Suboptimal health among Chinese middle school students may be associated with psychological symptoms and sleep duration: A cross-sectional survey in China

Suboptimal health among Chinese middle school students may be associated with psychological symptoms and sleep duration: A cross-sectional survey in China | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Suboptimal health among Chinese middle school students may be associated with psychological symptoms and sleep duration: A cross-sectional survey in China Zhaohao Zhong, Shangmin Chen, Xiaowei Zhang, Hengwei Chen, Liping Li This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4938654/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 12 Nov, 2024 Read the published version in BMC Public Health → Version 1 posted 4 You are reading this latest preprint version Abstract Background Suboptimal health status (SHS) is an intermediate status between ideal heath and illness, it is characterized by the perception of health complaints, general weakness, decreased immunity and low energy. More and more Chinese students have been troubled by psychological symptoms (PS). The relationship between SHS and PS is unclear in adolescents. This study aimed to investigate the prevalence of SHS and PS in Chinese adolescents and the relationship between SHS and PS and to identify the risk factors of SHS from the perspective of public health. Methods A cross-sectional study was conducted with the cluster sampling method among 1955 middle school students in Shantou, China. SHS was assessed by Suboptimal Health Status Questionnaire-25 (SHSQ-25). And the PS of anxiety and depression were assessed with Generalized Anxiety Disorder Scale (GAD-7) and Beck Depression Inventory-Ⅱ Scale (BDI-Ⅱ) self-assessment questionnaires. Variate logistic analysis was applied to explore risk factors of SHS. The relationship between SHS and PS among Chinese middle school students was subsequently analyzed. Results Among the 1955 participants, 1904 middle school students were finally included in the analysis, the effective response rate was 97.39%. The prevalence of SHS was 10.3% (197/1904) while the prevalence of anxiety and depression was 30.7% (585/1904) and 34.1% (649/1904), respectively. A strong correlation was identified between SHS and PS among middle school students. With the aggravation of anxiety and depression, the probability of suffering from SHS increased (both P <0.01). The scores for various dimensions of SHS among the depression and anxiety groups were higher compared to those of the non-depression and non-anxiety groups (all P <0.01 ). Multivariate regression showed that compared with sleeping less than six hours, 6–8 hours is a protective factor for SHS ( OR = 0.486, 95% CI = 0.278–0.851). Conclusions Attention should be paid to the SHS and PS of Chinese middle school students and there is a strong association between SHS and PS among them. Lack of sleep is a risk factor for SHS so that sufficient sleeping time should be highly recommended as an advised measure to prevent SHS. Further discovering the risk factors of SHS and ensuring adequate sleep will benefit the health status of adolescents. Suboptimal heath status (SHS) Psychological symptoms (PS) Sleep time Middle school students Introduction Adolescence is an important period of physical and mental growth. During this period, adolescents' bodies develop rapidly, but their psychology is immature and unstable. In the past 30 years, China has undergone unprecedented economic development and social change. The change has led to tremendous transformation in disease epidemiology, and the main health burden among adolescents has shifted from infectious diseases and nutritional deficiencies to non-communicable diseases, especially mental health disorders[ 1 ]. Modern society has put forward higher requirements for adolescents, including mental wellness, self-control and adjustment abilities, social adaptability, and daily behavioral habits, etc. However, the mental health situation of Chinese adolescents is not optimistic, a significant number of adolescents have mental health disorders, and the proportion is rising[ 2 – 4 ]. Increasing peer pressure puts a huge strain on adolescents. And adolescents regularly experience a variety of learning-related stressors including but not limited to long study hours, interpersonal relationships, emotional disturbance and parents' expectations, which is particularly serious in China. The education systems in China and the West, particularly Europe and America, exhibit significant differences. Western universities operate on an application-based system, typically requiring students to submit personal information, high school transcripts, personal statements, etc. China, on the other hand, operates under a compulsory nine-year education system. Initially, through the junior high school entrance examination, a portion of students is eliminated, meaning not every student has the opportunity to advance to high school. After three years of high school education, students take the national standardized college entrance examination. Every point gained or lost is crucial, determining whether one can enter their desired university. In China, both junior high school and high school students are collectively referred to as middle school students. Therefore, it is quite important to pay attention to the psychological and physical health of middle school students and the relationship between them. The World Health Organization (WHO) points out that health is not merely no disease or physical weakness, but rather a dynamic state of well-being encompassing physiological, psychological, and social adaptation[ 5 ]. With the shift in biomedical models and the spectrum of human diseases, the intermediate state between illness and health is gradually being recognized, known as Suboptimal health status (SHS)[ 6 ]. Nowadays, SHS is recognized as a significant public health challenge globally[ 6 ]. SHS typically lacks clinical symptoms and signs or may involve symptomatic sensations without clinical evidence, but there is a potential predisposition to disease, and the body is in a state of reduced physiological function and psychological imbalance[ 7 ]. The characteristics of SHS are described as the perception of health complaints, general weakness, low energy and immunocompromised[ 8 ]. SHS is characterized by the perception of health issues, persistent fatigue, and a combination of physical symptoms affecting various systems including the cardiovascular, digestive, and immune systems, as well as mental well-being. These symptoms typically persist for a duration of at least three months[ 7 ]. SHS is the process from health to disease, from quantitative changes to qualitative changes. It can return to a healthy state through strengthening self-care, or it can develop into various diseases due to unhealthy lifestyle habits[ 9 ]. Rapid changes in environment and lifestyles in China widely influence health conditions, exposing people to the increased risk of sub-optimal health status (SHS)[ 10 ]. Previous studies have shown that the prevalence of SHS was 55.9% among college students and 74.2% among nurses in China[ 11 , 12 ]. With the accelerating pace of life and increasing competitive pressures, adolescents inevitably experience varying degrees of psychological tension, fatigue, and significant psychological stress during their growth process. Although these factors may not immediately lead to disease immediately, they may have the potential to impact the physical and mental health of adolescents, increasing the risk of SHS. At present, an unprecedented increase in non-communicable diseases among individuals of all ages is observed[ 13 ]. The adolescent stage (ages 10 to 24) is a crucial period bridging childhood and adulthood. It is characterized by pubertal development, the evolution toward mature social roles, and the cultivation of independence. Adolescence represents a significant phase where individuals are highly influenced by peer groups and may adopt unhealthy behaviors like alcohol consumption, smoking, and poor dietary habits. These behaviors can impact both present and future health outcomes[ 14 ]. Unhealthy behaviors during adolescence are significantly harmful to the development of health consequences in later life[ 15 ]. Nevertheless, adolescence also presents a significant opportunity for shaping behavior positively, potentially leading to improved long-term health outcomes[ 14 ]. The period between the onset of SHS and the clinical manifestation of associated disorders provides an opportunity to employ reliable risk assessment tools and predictive diagnostics, followed by cost-effective targeted prevention and personalized treatments. This is particularly crucial during adolescence, as the adverse health effects of SHS are often reversible. Health scales and questionnaires serve as effective tools for identifying reversible health impairments that are challenging to measure directly[ 16 ]. Suboptimal Health Status Questionnaire-25 (SHSQ-25) has been established to measure SHS and it has been proved to be a reliable and valid tool among different ethnic groups[ 17 – 19 ]. SHSQ-25 consists of 25 items related to 5 domains: fatigue, cardiovascular system, digestive tract, immune system and mental state[ 16 ]. Previous studies have proved that SHS is associated with mental health disorders[ 20 ]. Although physical and psychological health of adolescents is receiving increasing attention, the psychological health status of Chinese adolescents is not optimistic. Recent epidemiological data suggested a significant number of Chinese adolescents exhibit symptoms of depression or anxiety[ 4 , 21 , 22 ]. Adolescent depression and anxiety not only affect their studies but also disrupt their regular lives. In severe cases, some may even engage in self-injuries or suicidal behaviors, causing huge economic losses and significant impacts on the normal societal development[ 23 , 24 ]. Moreover, psychological factors are associated with SHS and are always measured within SHS assessment[ 25 ]. For middle school students, early identification of SHS and prevention from progressing to disease states is crucial. This not only affects their academic performance but also impacts their overall health and development. In light of this, we conducted this survey to identify SHS among middle school students at an early stage and to explore the predictive factors associated with suboptimal health in this population, preparing for further personalized interventions. Participants and methods Ethics statement This study was approved by the Ethics Committee of Shantou University Medical School (No. SUMC-2022-076) and we had also obtained the consent of participants. All participants gave their informed consent and volunteered to participate. Inclusion criteria The inclusion criteria were (1) voluntarily participate in the survey, (2) no somatic diseases, (3) no psychiatric diseases or abnormalities currently, (4) no history of medication consumption in the previous 2 weeks. Exclusion criteria The exclusion criteria were (1) decline to participate in survey or refuse to provide informed consent, (2) unable to complete the questionnaire independently, (3) clinically diagnosed diseases. Participants’ recruitment A cross-sectional study was conducted at schools, Shantou city, China, from May to June 2022. The cluster random sampling method was used to select middle school students as the research subjects. A total of 1955 middle school students were preliminarily recruited in the survey. After excluding invalid questionnaires, the number of valid questionnaires was 1904 after review. The effective rate of the survey was 97.39% (1904/1955). SHS, depression, and anxiety assessment A general questionnaire was applied to investigate demographic information, including age, gender, average daily sleep time, exercise frequency, smoking behavior, etc. The condition of SHS was evaluated by the self-reporting questionnaire SHSQ-25. SHSQ-25 measures SHS across five dimensions: fatigue, cardiovascular system, digestive tract, immune system and mental state, comprising a total of 25 items[ 16 ]. Each item of SHSQ-25 adopts the Likert 5-point scoring method based on how often they underwent uncomfortable symptoms in the preceding 3 months, with the options “never or almost never,” “occasionally,” “often,” “very often,” and “always,” corresponding to 0, 1, 2, 3 and 4, respectively. The total score of SHSQ-25 was the sum of scores from each item, with a higher score indicating the worse health status[ 16 ]. Based on SHSQ-25, the health status was stratified into two classifications: ideal health (with summed score < 35) and suboptimal health (with summed score ≥ 35). The severity of depression and anxiety of participants were assessed by the Beck Depression Inventory-Ⅱ (BDI-Ⅱ) and Generalized Anxiety Disorder Scale (GAD-7) respectively[ 26 , 27 ]. BDI-Ⅱ comprises 21 items, based on the criteria provided by the scale and summed score, the participants were stratified into four classifications: no depression symptom (≤ 13), mild depression (14–19), moderate depression (20–28), and severe depression (≥ 29)[ 26 ]. The GAD-7 was utilized to investigate the degree of anxiety symptom. The GAD-7 consists of 7 items, with each item offering four response options: "not at all," "several days," "more than a week," and "nearly every day," corresponding to scores of 0, 1, 2, and 3, respectively. The higher the score, the more severe the anxiety symptom. Based on the criteria provided by the scale and summed score, the participants were categorized into the following groups: normal (0–4), mild anxiety (5–9), and severe anxiety (≥ 10). Grouping and statistical analysis The statistical analysis was performed by SPSS (version 23.0, IBM, New York, USA). Quantitative data normally distributed were described by the mean and standard deviation (mean ± SD) while non-normally distributed data were described as quartiles ( P 25 ~ P 75). Qualitative data were described by percentage or ratio. Student's t ( t ) test, Pearson chi-squared ( χ 2 ) test, Wilcoxon rank sum ( z ) test, ANOVA ( F ) test and LSD test were used to compare differences between groups. Multivariate logistic regression analysis was used to exploring risk factors for SHS, by which odds ratio ( OR ) and 95% confidence intervals ( CI ) were obtained. P < 0.05 was considered statistically significant. For comparison of GAD-7 and BDI-Ⅱ scores, participants were divided by quartile method based on shsq-25 scores into 4 groups as follows: Group A) SHSQ-25 score ≤ 7, Group B) SHSQ-25 score 8–14, Group C) SHSQ-25 score 15–22, Group D) SHSQ-25 score ≥ 23. Results Characteristics of participants The characteristics of 1904 eligible students participated in the survey as shown in Table 1 . Among 1904 students, 10.3% (197/1904) had SHS, and 89.7% (1707/1904) had optimal health (OPH). By comparing two groups, there were statistically significant difference on age ( P <0.001), gender ( P = 0.004), average daily sleep time ( P <0.001), smoking status ( P <0.001), drinking behavior ( P <0.001), and exercise frequency ( P <0.001). Table 1 Characteristics of participants Variables n OPH n = 1707 (89.7%) SHS n = 197 (10.3%) χ 2 P Age (years) * * 17.031 <0.001 12–14 679 635 (93.5) 44 (6.5) 15–17 1148 1005 (87.5) 143 (12.5) ≥ 18 77 67 (87.0) 10 (13.0) Gender * Male 978 896 (91.6) 82 (8.4) 8.347 0.004 Female 926 811 (87.6) 115 (12.4) BMI 2.323 0.508 Thin 898 810 (90.2) 88 (9.8) Normal 770 692 (89.9) 78 (10.1) Overweight 112 97 (86.6) 15 (13.4) Obese 124 108 (87.1) 16 (12.9) Academic record 8.866 0.065 70% 214 188 (87.9) 26 (12.1) Left-behind children 0.125 0.724 Yes 78 69 (88.5) 9 (11.5) No 1826 1638 (89.7) 188 (10.3) Live in campus 2.155 0.142 Yes 220 191 (86.8) 29 (13.2) No 1684 1516 (90.0) 168 (10.0) Average daily sleep time ** 107.861 <0.001 8 hours 208 193 (92.8) 15 (7.2) Smoking status ** 37.673 <0.001 Yes 177 135 (76.3) 42 (23.7) No 1727 1572 (91.0) 155 (9.0) Drinking behavior ** 82.803 <0.001 Yes 70 40 (57.1) 30 (42.9) No 1834 1667 (90.9) 167 (9.1) Exercise frequency ** 73.125 <0.001 Seldom or never 125 84 (67.2) 41 (32.8) Occasionally 1244 1131 (90.9) 113 (9.1) Frequently 535 492 (92.0) 43 (8.0) * P <0.05, ** P <0.001 Psychological states of participants As shown in Table 2 , SHS middle school students had statistically higher mean GAD-7 score (11.53 versus 2.60, P <0.001) and BDI-Ⅱ (30.91 versus 9.11, P <0.001) compared with OPH middle school students. And as the levels of anxiety and depression symptoms intensify, the rate of SHS increased. Table 2 Comparison of mean scores of GAD-7 and BDI-Ⅱ, and degree of symptoms between OPH and SHS groups. Variables n OPH n = 1707 (89.7%) SHS n = 197 (10.3%) t / z P GAD-7 1904 2.60 ± 3.10 11.53 ± 5.60 -34.484 <0.001 Normal 1319 1301 (76.2) 18 (9.1) 488.940 <0.001 Mild 424 356 (20.9) 68 (34.5) Severe 161 50 (2.9) 111 (56.4) BDI-Ⅱ 1904 9.11 ± 9.49 30.91 ± 12.39 -29.481 <0.001 Normal 1255 1238 (72.5) 17 (8.6) 454.443 <0.001 Mild 240 220 (12.9) 20 (10.2) Moderate 210 170 (10.0) 40 (20.3) Severe 199 79 (14.6) 120 (60.9) Logistic regression analysis on SHS As shown in Table 3 , the multivariate regression analysis with whether had SHS as the dependent variable was performed to identify major influences showed that average sleep time ( P = 0.017), GAD-7 ( P <0.001) and BDI-Ⅱ ( P <0.001) were positively associated with SHS. Compared with sleeping less than six hours, 6–8 hours is a protective factor for SHS ( OR = 0.486, 95% CI = 0.278–0.851). As the score of GAD-7 and BDI-Ⅱ increased, adolescents were 1.327 times and 1.082 times increased risk of developing SHS, respectively. Table 3 Multivariate logistic regression analysis for SHS Β SE Wald P Exp(B) 95% CI Male -0.227 0.239 0.904 0.191 0.797 (0.499–1.273) Age 3.326 0.190 15–17 0.429 0.263 2.663 0.103 1.535 (0.917–2.569) >18 0.695 0.531 1.713 0.191 2.003 (0.708–5.668) Average sleep time 8.146 0.017 6–8 hours -0.721 0.285 6.376 0.012 0.486 (0.278–0.851) >8 hours -0.067 0.456 0.021 0.884 0.936 (0.383–2.288) Smoking -0.002 0.417 0.000 0.996 0.998 (0.440–2.262) Drinking 0.549 0.514 1.140 0.286 1.731 (0.632–4.742) Exercise 1.664 0.435 Seldom or never 0.045 0.422 0.012 0.914 1.046 (0.458–2.392) Occasionally -0.288 0.280 1.052 0.305 0.750 (0.433–1.299) GAD-7 0.283 0.029 92.061 <0.001 1.327 (1.252–1.406) BDI-Ⅱ 0.079 0.011 51.003 <0.001 1.082 (1.059–1.106) Correlation between PS and SHS Among the students participated in the survey, there were statistically differences in the average GAD-7 and BDI-Ⅱ scores between all four quartiles of the SHS scores (all P <0.001), and the score of GAD-7 and BDI-Ⅱ increased significantly with increasing SHS quartile scores (Table 4 ). Table 4 Comparison of GAD-7 and BDI-Ⅱ scores of adolescents grouped by SHSQ-25 quartile Group A (n = 487) Group B (n = 470) Group C (n = 479) Group D (n = 468) F P LSD GAD-7 0.69 ± 1.62 1.95 ± 2.43 3.45 ± 2.77 8.13 ± 5.45 440.270 <0.001 A vs. B ** A vs. C ** A vs. D ** B vs. C ** B vs. D ** C vs. D ** BDI-Ⅱ 3.00 ± 5.03 8.09 ± 8.44 11.26 ± 9.02 23.45 ± 12.73 424.488 <0.001 A vs. B ** A vs. C ** A vs. D ** B vs. C ** B vs. D ** C vs. D ** ** P <0.001 Compared with non-anxiety group, the average SHS specific domains scores of mental health status, immune system, digestive tract, cardiovascular health and fatigue were statistically significantly increased among the students who had anxiety symptom (Table 5 ). Similarly, the depression group scored higher in each dimension of SHS than non-depression group (Table 6 ). Table 5 Comparison of the scores of the five domains of SHSQ-25 between the non-anxiety and anxiety groups depending on GAD-7 scores non-anxiety n = 1319 (69.28%) anxiety n = 585 (30.72%) t P Mental state 3.83 ± 3.51 10.00 ± 5.80 -28.609 <0.001 Immune system 3.83 ± 3.51 10.00 ± 5.80 -17.219 <0.001 Digestive tract 1.07 ± 1.53 2.75 ± 2.24 -19.021 <0.001 Cardiovascular system 0.43 ± 0.95 1.95 ± 2.31 -20.358 <0.001 Fatigue 5.24 ± 3.57 11.48 ± 5.95 -28.221 <0.001 Total score 11.91 ± 8.58 28.83 ± 15.28 -30.738 <0.001 Table 6 Comparison of the scores of the five domains of SHSQ-25 between the non-depression and depression groups depending on BDI-Ⅱ scores non-depression n = 1255 (65.91%) depression n = 649 (34.09%) t P Mental status 3.73 ± 3.52 9.58 ± 5.70 -27.528 <0.001 Immune system 1.35 ± 1.35 2.49 ± 2.03 -14.575 <0.001 Digestive tract 1.01 ± 1.40 2.71 ± 2.30 -20.031 <0.001 Cardiovascular system 0.41 ± 0.96 1.84 ± 2.22 -19.452 <0.001 Fatigue 5.14 ± 3.51 11.04 ± 5.93 -27.207 <0.001 Total score 11.66 ± 8.54 27.66 ± 15.13 -29.465 <0.001 Correlation between sleep and SHS As shown in Table 7 , the average daily sleep time of students had a significant inverse association with SHS score. There were statistical differences between the total SHS score and score of each domain among three groups categorized by average daily sleep time (all P <0.001), and differences existed between each group. Specifically, with a decrease in sleep time, the score of each domain of SHS increased significantly. Table 7 Comparison of the scores of the five domains of SHSQ-25 between the groups depending on average daily sleep time Group 1 n = 195 (10.24%) Group 2 n = 1501 (78.83%) Group 3 n = 208 (10.92%) F P LSD Mental status 8.78 ± 6.62 5.54 ± 4.85 4.24 ± 5.02 45.253 <0.001 A vs. B ** A vs. C ** B vs. C * Immune system 2.46 ± 2.45 1.70 ± 1.61 1.31 ± 1.21 25.081 <0.001 A vs. B ** A vs. C ** B vs. C * Digestive tract 2.83 ± 2.99 1.49 ± 1.71 1.13 ± 1.82 49.937 <0.001 A vs. B ** A vs. C ** B vs. C * Cardiovascular system 1.55 ± 2.56 0.88 ± 1.56 0.41 ± 0.91 25.236 <0.001 A vs. B ** A vs. C ** B vs. C ** Fatigue 10.99 ± 7.23 6.94 ± 4.82 5.13 ± 4.63 73.038 <0.001 A vs. B ** A vs. C ** B vs. C ** Total score 26.62 ± 19.00 16.55 ± 12.35 12.22 ± 11.55 67.133 <0.001 A vs. B ** A vs. C ** B vs. C ** Group 1) 8 hours, * P <0.05, ** P <0.001 Discussion The WHO defined health as the state of complete physical, mental, and social well-being, and not merely the absence of disease or infirmity[ 5 ]. SHS may not always correspond to either the early stage or preclinical phase of an illness, but it is typically defined as the period preceding the onset of clinical manifestations of diseases. Individuals in the early stage or preclinical period often require interventions with specific therapies aimed at preventing or delaying the onset of the disease[ 28 ]. Modifiable risk factors, in particular, play a crucial role in implementing targeted, cost-effective prevention measures for illnesses in the population. Adolescence is a critical period of physical, psychological and social adaptation. However, China's environmental pollution and rapid changes in lifestyle have widely affected people's health conditions and greatly increased the risk of SHS[ 9 ]. At the same time, SHS is also a major challenge faced by the global public health[ 29 , 30 ]. With the rapid development of the social economy, various cultures, pressures, values, lifestyle behaviors, etc., swiftly infiltrate the adolescents, significantly impacting the immature physical and mental aspects, leading to an increasing prevalence of SHS among adolescents. The research findings revealed that among 1904 middle school students, a total of 197 (10.35%) were identified SHS. Previous research on people aged 15–60 in China showed that the prevalence of SHS was 46.3%, which was higher than current study[ 31 ]. And the research conducted in Chinese universities showed the prevalence of SHS among college students was 21.0%, which was also higher than current study[ 32 ]. The SHS rate among adolescents was slightly lower compared to the general population, which may be attributed to the fact that SHS tends to increase with age[ 12 ]. However, this by no means implies that SHS in adolescents should be overlooked. Instead, we should pay more attention to SHS in adolescents. Adolescents develop rapidly physically and mentally but are immature, while simultaneously facing a series of external pressures such as academic, employment, and emotional challenges, leading to a gradual prevalence of SHS[ 33 ]. SHS may be a pathway to a whole lifespan, determining the increased cause of health risk in old age and it is recognized that early diagnosis and timely management can prevent the occurrence of SHS[ 34 ]. Adolescents with SHS often manifests in daily life as low energy and a state of fatigue, severely impacting the academic performance and healthy growth of adolescents[ 6 ]. At the same time, SHS is associated with internalizing issues such as anxiety and depression[ 12 ], consistent with the results obtained in this study focusing on the middle school students. In the present study, the prevalence of depressive symptoms and anxiety symptoms are 34.09% and 30.72%, respectively, which is consistent with those reported by other studies[ 35 , 36 ]. The PS of Chinese adolescents is not optimistic. The present study showed that compared with students without PS, the prevalence of SHS among students with depression and anxiety symptoms were 91.4% and 90.9%, respectively (Table 2 ), which were extremely high. And through multivariate logistic regression, it was found that as the scores of GAD-7 and BDI-Ⅱ increased, adolescents were 1.33 times and 1.08 times increased risk of developing SHS, respectively (Table 3 ). Another finding was that as the SHS score increased, both the GAD-7 and BDI-Ⅱ scores increased in the same direction (Table 4 ). In addition, the five domain scores and total score of SHS were significantly higher in the groups of students who had anxiety or depression symptom (Tables 5 and 6 ). According to the results of this study, a strong correlation can be identified between PS and SHS. The reasons for adolescents' susceptibility to psychological issues such as depression or anxiety are complex and involve multiple factors. Firstly, physiological changes are a significant characteristic of adolescence, and these changes during this period may have a significant impact on emotional and PS. The hormonal levels fluctuate during adolescence, with an increase in the secretion of sex hormones and growth hormones promoting rapid physical growth and development, the hormonal fluctuation may lead to emotional swings[ 37 , 38 ]. In addition, heavy academic pressure is a significant challenge faced by adolescents, especially in middle school stage, which may have a huge impact on the psychological well-being of Chinese adolescents[ 39 , 40 ]. Adolescents need to cope with numerous exams and academic assessments, such as high school or university entrance exams, which are extremely crucial in China and are likely result in anxiety and depression among adolescents. Meanwhile, these intense competitions mean that students must perform better academically for better prospects. This kind of competition often adds a considerable amount of anxiety and pressure to them. Furthermore, middle school students may feel overwhelmed by academic burdens, including a substantial amount of homework and extracurricular tutoring, leaving them with insufficient time for physical and mental rest. Faced with these pressures, students may experience feelings of frustration, anxiety, and even depression[ 41 ]. Psychological stress is a type of negative emotional state. Chronic social psychological stress caused by long-term psychological stress may lead to SHS by the changed profiling of serum cortisol level and glucocorticoid receptor[ 42 , 43 ]. Adolescents may also experience PS due to the excessive expectations from parents[ 44 ]. The intense competitions, academic burdens, physiological changes and excessive expectations affect the physical and mental health of adolescents in China, resulting in poor health status. For example, if the symptoms of depression and anxiety are not well managed, they will increase the risk of suffering cardiovascular diseases[ 45 , 46 ]. In the OPH group, the proportion of sleep time less than 6 hours was lower than that of SHS group. The results of multivariate logistic regression analysis with whether had SHS as the dependent variable also showed that compared with students sleep less than 6 hours, sleeping 6–8 hours is a significant protective factor ( P = 0.012) for SHS (Table 3 ). In addition, with the increase in sleeping time, the scores of each dimension of SHS decreased (Table 7 ). The explanation to the observed finding may owe to the shared common characteristics between SHS and insufficient sleep, particularly the relevant items in the questionnaires and the common predisposing factors associated with their causes. These results indicate that adequate sleeping time helps reduce the risk of SHS. Previous studies have indicated that sufficient sleep contributes to reducing psychological stress and helps maintain both physical and mental well-being[ 47 , 48 ]. Sleep is an important factor in promoting physical growth and development in adolescents and helps the maintenance of normal bodily functions[ 48 ]. Moreover, numerous studies have proven that sufficient sleep helps strengthen the immune system, enabling adolescents more resistant to disease[ 49 ], and the regular sleep pattern contributes to maintaining normal metabolic functions, preventing obesity, and other metabolic issues[ 50 , 51 ]. Adequate sleep also helps improve PS. It was reported previously that sufficient sleep can alleviate anxiety and depressive feelings, contributing to emotional stability and psychological well-being[ 52 ]. This, in turn, helps adolescents better cope with the pressures and challenges of daily life. For middle school students, adequate sleep is crucial for learning, memory and attention[ 53 ]. It helps enhance learning efficiency and academic performance. The current study indicates that adolescents who get less sleep are more susceptible to SHS. The coexistence of SHS and insufficient sleep will aggravate in terms of worse life quality, higher health risks, lower study efficiency and less happiness. This research has confirmed a significant correlation between SHS and anxiety, depression among middle school students, with inadequate sleep of less than 6 hours being identified as a predictive factor for SHS. From the perspective of public health, identifying modifiable risk factors, predicting, preventing and performing early personalized interventions are highly important for preventing and reducing the risk of disease. For middle school students, physical health is just as important as mental health. SHSQ-25 can be used to screen for SHS groups, and combined with physical examination indicators, personalized interventions can be implemented in future work to extend life expectancy. Limitations The cross-sectional study data were derived from self-administered questionnaires. Students surveyed need to recall information about themselves, which may lead to recall bias. Additionally, regarding certain sensitive questions, there was a possibility of exaggeration or concealment, resulting in socially desirable responses and causing reporting bias. In addition, the study was a cross-sectional study, making it difficult to infer a casual relationship between PS and SHS, further longitudinal studies were needed to infer causal relationships between variables. Conclusions The prevalence of SHS and PS among middle school students in China are relatively high. The study demonstrated that that adolescents experiencing anxiety, depression, and insufficient sleep are more prone to SHS. From the perspectives of public health, strategies for early, personalised intervention at the SHS stage are urgently needed to improve the mental health of adolescents and enhance their coping and adaptability skills. The sleep condition is also worth noting, and it is essential to ensure that adolescents obtain sufficient sleep. Overall, the SHS among middle school students shows a worrying trend, significantly compromising their normal healthy development and impacting the comprehensive enhancement of their life. Although SHS is not a disease, it still has an important negative impact on adolescents. Therefore, it is crucial to prioritize and take measures to prevent SHS among adolescents. To prevent the occurrence of SHS among adolescents, comprehensive measures need to be implemented. These measures encompass not only developing good sleeping habits to ensure sufficient sleep, but also enhancing social and emotional support, improving dietary habits, increasing physical activity, and elevating the overall health level of adolescents. Parents, schools, and society also need to provide more attention and support to adolescents. The health department should take the lead in collaboration with education, civil affairs, and other relevant departments to guide adolescents and their guardians in forming a health management mindset. Simultaneously, emphasis should be placed on the collaboration between families and schools, with widespread participation from both, ensuring quality outdoor activities while implementing educational measures to reduce stress. Prioritizing health care and regular check-ups, promoting balanced nutrition, and comprehensive prevention strategies are crucial for addressing SHS among adolescents. Abbreviations SHS Suboptimal health status OPH optimal health PS psychological symptoms WHO World Health Organization BMI body mass index SHSQ-25 Suboptimal Health Status Questionnaire-25 BDI-Ⅱ Beck Depression Inventory-Ⅱ GAD-7 Generalized Anxiety Disorder Scale OR odds ratio CI confidence intervals GR glucocorticoid IgG immunoglobulin G. Declarations Data Availability Statement The datasets used and analyzed in the study are available from the corresponding author on reasonable request. Funding This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. Competing interests The authors declare no conflict of interest. Ethics approval This study was approved by the Ethics Committee of Shantou University Medical School (No. SUMC-2022-076) and we had also obtained the consent of participants. All participants were required to sign an informed consent before being enrolled in this study. Consent to participate Informed consent was obtained from all subjects involved in the study. Consent for publication All the authors had complete access to the manuscript and agreed to submit it for publication. Code availability Not applicable. Author contributions Z.Z. and C.S. undertook the data analysis, wrote down the research process and literature reviews, and interpreted the results. Z.X. and C.H. performed the data collection, complete statistical tables, and result analysis. 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Int J Environ Res Public Health 2021, 18(14). Beiter R, Nash R, McCrady M, Rhoades D, Linscomb M, Clarahan M, Sammut S. The prevalence and correlates of depression, anxiety, and stress in a sample of college students. J Affect Disord. 2015;173:90–6. Kubzansky LD, Huffman JC, Boehm JK, Hernandez R, Kim ES, Koga HK, Feig EH, Lloyd-Jones DM, Seligman MEP, Labarthe DR. Positive Psychological Well-Being and Cardiovascular Disease: JACC Health Promotion Series. J Am Coll Cardiol. 2018;72(12):1382–96. Song H, Fang F, Arnberg FK, Mataix-Cols D, Fernández de la Cruz L, Almqvist C, Fall K, Lichtenstein P, Thorgeirsson G, Valdimarsdóttir UA. Stress related disorders and risk of cardiovascular disease: population based, sibling controlled cohort study. BMJ. 2019;365:l1255. Curran T, Hill AP. Young people's perceptions of their parents' expectations and criticism are increasing over time: Implications for perfectionism. Psychol Bull. 2022;148(1–2):107–28. Meng R, Yu C, Liu N, He M, Lv J, Guo Y, Bian Z, Yang L, Chen Y, Zhang X, et al. Association of Depression With All-Cause and Cardiovascular Disease Mortality Among Adults in China. JAMA Netw Open. 2020;3(2):e1921043. Tully PJ, Harrison NJ, Cheung P, Cosh S. Anxiety and Cardiovascular Disease Risk: a Review. Curr Cardiol Rep. 2016;18(12):120. Scott AJ, Webb TL, Martyn-St James M, Rowse G, Weich S. Improving sleep quality leads to better mental health: A meta-analysis of randomised controlled trials. Sleep Med Rev. 2021;60:101556. Tarokh L, Saletin JM, Carskadon MA. Sleep in adolescence: Physiology, cognition and mental health. Neurosci Biobehav Rev. 2016;70:182–8. Besedovsky L, Lange T, Born J. Sleep and immune function. Pflugers Arch. 2012;463(1):121–37. Chaput J-P, McHill AW, Cox RC, Broussard JL, Dutil C, da Costa BGG, Sampasa-Kanyinga H, Wright KP. The role of insufficient sleep and circadian misalignment in obesity. Nat Rev Endocrinol. 2023;19(2):82–97. Duan D, Kim LJ, Jun JC, Polotsky VY. Connecting insufficient sleep and insomnia with metabolic dysfunction. Ann N Y Acad Sci 2023, 1519(1). Ghrouz AK, Noohu MM, Dilshad Manzar M, Warren Spence D, BaHammam AS, Pandi-Perumal SR. Physical activity and sleep quality in relation to mental health among college students. Sleep Breath. 2019;23(2):627–34. Kopasz M, Loessl B, Hornyak M, Riemann D, Nissen C, Piosczyk H, Voderholzer U. Sleep and memory in healthy children and adolescents - a critical review. Sleep Med Rev. 2010;14(3):167–77. Additional Declarations No competing interests reported. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4938654","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":343139783,"identity":"d832f211-b9e2-4126-88ad-3deb72c5d7b7","order_by":0,"name":"Zhaohao Zhong","email":"","orcid":"","institution":"Shantou University","correspondingAuthor":false,"prefix":"","firstName":"Zhaohao","middleName":"","lastName":"Zhong","suffix":""},{"id":343139784,"identity":"95d7cdce-eade-4e91-ba5e-1bbb71fd8751","order_by":1,"name":"Shangmin Chen","email":"","orcid":"","institution":"Shantou University","correspondingAuthor":false,"prefix":"","firstName":"Shangmin","middleName":"","lastName":"Chen","suffix":""},{"id":343139786,"identity":"59923110-6bd3-4365-9bc0-856bf8a9c621","order_by":2,"name":"Xiaowei Zhang","email":"","orcid":"","institution":"Shantou University","correspondingAuthor":false,"prefix":"","firstName":"Xiaowei","middleName":"","lastName":"Zhang","suffix":""},{"id":343139788,"identity":"6f976c20-d400-4a17-bb4a-2fe0668ba3ce","order_by":3,"name":"Hengwei Chen","email":"","orcid":"","institution":"Shantou University","correspondingAuthor":false,"prefix":"","firstName":"Hengwei","middleName":"","lastName":"Chen","suffix":""},{"id":343139793,"identity":"20be8ef9-2cc0-4a01-ba77-01723264dfd0","order_by":4,"name":"Liping Li","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAqUlEQVRIiWNgGAWjYBACPgbmhgMfIGwD4rSwMTA2HJwBUU2CFmYe0rRINzYetvnzJ7GBvXmbBEPNHSK0yBxsOJzbZpDYwHOsTILh2DMitEgkArU0ALVI5JhJMDYcJlKLxR+gFvk3pGhhYAPZwkOsFqBfDva2GRu38aQVWyQcI0ILv3Tz4Q8//sjJ9rMf3njjQw0RWhgkYNaBiAQiNCC0jIJRMApGwSjACQDBfDbxFL3eMQAAAABJRU5ErkJggg==","orcid":"","institution":"Shantou University","correspondingAuthor":true,"prefix":"","firstName":"Liping","middleName":"","lastName":"Li","suffix":""}],"badges":[],"createdAt":"2024-08-19 12:32:26","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4938654/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4938654/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1186/s12889-024-20658-8","type":"published","date":"2024-11-12T15:56:54+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":69274732,"identity":"5473de28-a270-4ead-9f9e-3eb73d2854b0","added_by":"auto","created_at":"2024-11-18 16:19:24","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":961086,"visible":true,"origin":"","legend":"","description":"","filename":"manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4938654/v1/585974a0-f902-4c53-8758-e0b31eb160f0.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Suboptimal health among Chinese middle school students may be associated with psychological symptoms and sleep duration: A cross-sectional survey in China","fulltext":[{"header":"Introduction","content":"\u003cp\u003eAdolescence is an important period of physical and mental growth. During this period, adolescents' bodies develop rapidly, but their psychology is immature and unstable. In the past 30 years, China has undergone unprecedented economic development and social change. The change has led to tremendous transformation in disease epidemiology, and the main health burden among adolescents has shifted from infectious diseases and nutritional deficiencies to non-communicable diseases, especially mental health disorders[\u003cspan citationid=\"CR1\" class=\"CitationRef\"\u003e1\u003c/span\u003e]. Modern society has put forward higher requirements for adolescents, including mental wellness, self-control and adjustment abilities, social adaptability, and daily behavioral habits, etc. However, the mental health situation of Chinese adolescents is not optimistic, a significant number of adolescents have mental health disorders, and the proportion is rising[\u003cspan additionalcitationids=\"CR3\" citationid=\"CR2\" class=\"CitationRef\"\u003e2\u003c/span\u003e\u0026ndash;\u003cspan citationid=\"CR4\" class=\"CitationRef\"\u003e4\u003c/span\u003e]. Increasing peer pressure puts a huge strain on adolescents. And adolescents regularly experience a variety of learning-related stressors including but not limited to long study hours, interpersonal relationships, emotional disturbance and parents' expectations, which is particularly serious in China. The education systems in China and the West, particularly Europe and America, exhibit significant differences. Western universities operate on an application-based system, typically requiring students to submit personal information, high school transcripts, personal statements, etc. China, on the other hand, operates under a compulsory nine-year education system. Initially, through the junior high school entrance examination, a portion of students is eliminated, meaning not every student has the opportunity to advance to high school. After three years of high school education, students take the national standardized college entrance examination. Every point gained or lost is crucial, determining whether one can enter their desired university. In China, both junior high school and high school students are collectively referred to as middle school students. Therefore, it is quite important to pay attention to the psychological and physical health of middle school students and the relationship between them.\u003c/p\u003e \u003cp\u003eThe World Health Organization (WHO) points out that health is not merely no disease or physical weakness, but rather a dynamic state of well-being encompassing physiological, psychological, and social adaptation[\u003cspan citationid=\"CR5\" class=\"CitationRef\"\u003e5\u003c/span\u003e]. With the shift in biomedical models and the spectrum of human diseases, the intermediate state between illness and health is gradually being recognized, known as Suboptimal health status (SHS)[\u003cspan citationid=\"CR6\" class=\"CitationRef\"\u003e6\u003c/span\u003e]. Nowadays, SHS is recognized as a significant public health challenge globally[\u003cspan citationid=\"CR6\" class=\"CitationRef\"\u003e6\u003c/span\u003e]. SHS typically lacks clinical symptoms and signs or may involve symptomatic sensations without clinical evidence, but there is a potential predisposition to disease, and the body is in a state of reduced physiological function and psychological imbalance[\u003cspan citationid=\"CR7\" class=\"CitationRef\"\u003e7\u003c/span\u003e]. The characteristics of SHS are described as the perception of health complaints, general weakness, low energy and immunocompromised[\u003cspan citationid=\"CR8\" class=\"CitationRef\"\u003e8\u003c/span\u003e]. SHS is characterized by the perception of health issues, persistent fatigue, and a combination of physical symptoms affecting various systems including the cardiovascular, digestive, and immune systems, as well as mental well-being. These symptoms typically persist for a duration of at least three months[\u003cspan citationid=\"CR7\" class=\"CitationRef\"\u003e7\u003c/span\u003e]. SHS is the process from health to disease, from quantitative changes to qualitative changes. It can return to a healthy state through strengthening self-care, or it can develop into various diseases due to unhealthy lifestyle habits[\u003cspan citationid=\"CR9\" class=\"CitationRef\"\u003e9\u003c/span\u003e]. Rapid changes in environment and lifestyles in China widely influence health conditions, exposing people to the increased risk of sub-optimal health status (SHS)[\u003cspan citationid=\"CR10\" class=\"CitationRef\"\u003e10\u003c/span\u003e]. Previous studies have shown that the prevalence of SHS was 55.9% among college students and 74.2% among nurses in China[\u003cspan citationid=\"CR11\" class=\"CitationRef\"\u003e11\u003c/span\u003e, \u003cspan citationid=\"CR12\" class=\"CitationRef\"\u003e12\u003c/span\u003e]. With the accelerating pace of life and increasing competitive pressures, adolescents inevitably experience varying degrees of psychological tension, fatigue, and significant psychological stress during their growth process. Although these factors may not immediately lead to disease immediately, they may have the potential to impact the physical and mental health of adolescents, increasing the risk of SHS.\u003c/p\u003e \u003cp\u003eAt present, an unprecedented increase in non-communicable diseases among individuals of all ages is observed[\u003cspan citationid=\"CR13\" class=\"CitationRef\"\u003e13\u003c/span\u003e]. The adolescent stage (ages 10 to 24) is a crucial period bridging childhood and adulthood. It is characterized by pubertal development, the evolution toward mature social roles, and the cultivation of independence. Adolescence represents a significant phase where individuals are highly influenced by peer groups and may adopt unhealthy behaviors like alcohol consumption, smoking, and poor dietary habits. These behaviors can impact both present and future health outcomes[\u003cspan citationid=\"CR14\" class=\"CitationRef\"\u003e14\u003c/span\u003e]. Unhealthy behaviors during adolescence are significantly harmful to the development of health consequences in later life[\u003cspan citationid=\"CR15\" class=\"CitationRef\"\u003e15\u003c/span\u003e]. Nevertheless, adolescence also presents a significant opportunity for shaping behavior positively, potentially leading to improved long-term health outcomes[\u003cspan citationid=\"CR14\" class=\"CitationRef\"\u003e14\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eThe period between the onset of SHS and the clinical manifestation of associated disorders provides an opportunity to employ reliable risk assessment tools and predictive diagnostics, followed by cost-effective targeted prevention and personalized treatments. This is particularly crucial during adolescence, as the adverse health effects of SHS are often reversible. Health scales and questionnaires serve as effective tools for identifying reversible health impairments that are challenging to measure directly[\u003cspan citationid=\"CR16\" class=\"CitationRef\"\u003e16\u003c/span\u003e]. Suboptimal Health Status Questionnaire-25 (SHSQ-25) has been established to measure SHS and it has been proved to be a reliable and valid tool among different ethnic groups[\u003cspan additionalcitationids=\"CR18\" citationid=\"CR17\" class=\"CitationRef\"\u003e17\u003c/span\u003e\u0026ndash;\u003cspan citationid=\"CR19\" class=\"CitationRef\"\u003e19\u003c/span\u003e]. SHSQ-25 consists of 25 items related to 5 domains: fatigue, cardiovascular system, digestive tract, immune system and mental state[\u003cspan citationid=\"CR16\" class=\"CitationRef\"\u003e16\u003c/span\u003e].\u003c/p\u003e \u003cp\u003ePrevious studies have proved that SHS is associated with mental health disorders[\u003cspan citationid=\"CR20\" class=\"CitationRef\"\u003e20\u003c/span\u003e]. Although physical and psychological health of adolescents is receiving increasing attention, the psychological health status of Chinese adolescents is not optimistic. Recent epidemiological data suggested a significant number of Chinese adolescents exhibit symptoms of depression or anxiety[\u003cspan citationid=\"CR4\" class=\"CitationRef\"\u003e4\u003c/span\u003e, \u003cspan citationid=\"CR21\" class=\"CitationRef\"\u003e21\u003c/span\u003e, \u003cspan citationid=\"CR22\" class=\"CitationRef\"\u003e22\u003c/span\u003e]. Adolescent depression and anxiety not only affect their studies but also disrupt their regular lives. In severe cases, some may even engage in self-injuries or suicidal behaviors, causing huge economic losses and significant impacts on the normal societal development[\u003cspan citationid=\"CR23\" class=\"CitationRef\"\u003e23\u003c/span\u003e, \u003cspan citationid=\"CR24\" class=\"CitationRef\"\u003e24\u003c/span\u003e]. Moreover, psychological factors are associated with SHS and are always measured within SHS assessment[\u003cspan citationid=\"CR25\" class=\"CitationRef\"\u003e25\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eFor middle school students, early identification of SHS and prevention from progressing to disease states is crucial. This not only affects their academic performance but also impacts their overall health and development. In light of this, we conducted this survey to identify SHS among middle school students at an early stage and to explore the predictive factors associated with suboptimal health in this population, preparing for further personalized interventions.\u003c/p\u003e"},{"header":"Participants and methods","content":"\u003cdiv id=\"Sec3\" class=\"Section2\"\u003e \u003ch2\u003eEthics statement\u003c/h2\u003e \u003cp\u003eThis study was approved by the Ethics Committee of Shantou University Medical School (No. SUMC-2022-076) and we had also obtained the consent of participants. All participants gave their informed consent and volunteered to participate.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec4\" class=\"Section2\"\u003e \u003ch2\u003eInclusion criteria\u003c/h2\u003e \u003cp\u003eThe inclusion criteria were (1) voluntarily participate in the survey, (2) no somatic diseases, (3) no psychiatric diseases or abnormalities currently, (4) no history of medication consumption in the previous 2 weeks.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec5\" class=\"Section2\"\u003e \u003ch2\u003eExclusion criteria\u003c/h2\u003e \u003cp\u003eThe exclusion criteria were (1) decline to participate in survey or refuse to provide informed consent, (2) unable to complete the questionnaire independently, (3) clinically diagnosed diseases.\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec6\" class=\"Section2\"\u003e \u003ch2\u003eParticipants\u0026rsquo; recruitment\u003c/h2\u003e \u003cp\u003eA cross-sectional study was conducted at schools, Shantou city, China, from May to June 2022. The cluster random sampling method was used to select middle school students as the research subjects. A total of 1955 middle school students were preliminarily recruited in the survey. After excluding invalid questionnaires, the number of valid questionnaires was 1904 after review. The effective rate of the survey was 97.39% (1904/1955).\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec7\" class=\"Section2\"\u003e \u003ch2\u003eSHS, depression, and anxiety assessment\u003c/h2\u003e \u003cp\u003eA general questionnaire was applied to investigate demographic information, including age, gender, average daily sleep time, exercise frequency, smoking behavior, etc.\u003c/p\u003e \u003cp\u003eThe condition of SHS was evaluated by the self-reporting questionnaire SHSQ-25. SHSQ-25 measures SHS across five dimensions: fatigue, cardiovascular system, digestive tract, immune system and mental state, comprising a total of 25 items[\u003cspan citationid=\"CR16\" class=\"CitationRef\"\u003e16\u003c/span\u003e]. Each item of SHSQ-25 adopts the Likert 5-point scoring method based on how often they underwent uncomfortable symptoms in the preceding 3 months, with the options \u0026ldquo;never or almost never,\u0026rdquo; \u0026ldquo;occasionally,\u0026rdquo; \u0026ldquo;often,\u0026rdquo; \u0026ldquo;very often,\u0026rdquo; and \u0026ldquo;always,\u0026rdquo; corresponding to 0, 1, 2, 3 and 4, respectively. The total score of SHSQ-25 was the sum of scores from each item, with a higher score indicating the worse health status[\u003cspan citationid=\"CR16\" class=\"CitationRef\"\u003e16\u003c/span\u003e]. Based on SHSQ-25, the health status was stratified into two classifications: ideal health (with summed score\u0026thinsp;\u0026lt;\u0026thinsp;35) and suboptimal health (with summed score\u0026thinsp;\u0026ge;\u0026thinsp;35).\u003c/p\u003e \u003cp\u003eThe severity of depression and anxiety of participants were assessed by the Beck Depression Inventory-Ⅱ (BDI-Ⅱ) and Generalized Anxiety Disorder Scale (GAD-7) respectively[\u003cspan citationid=\"CR26\" class=\"CitationRef\"\u003e26\u003c/span\u003e, \u003cspan citationid=\"CR27\" class=\"CitationRef\"\u003e27\u003c/span\u003e]. BDI-Ⅱ comprises 21 items, based on the criteria provided by the scale and summed score, the participants were stratified into four classifications: no depression symptom (\u0026le;\u0026thinsp;13), mild depression (14\u0026ndash;19), moderate depression (20\u0026ndash;28), and severe depression (\u0026ge;\u0026thinsp;29)[\u003cspan citationid=\"CR26\" class=\"CitationRef\"\u003e26\u003c/span\u003e]. The GAD-7 was utilized to investigate the degree of anxiety symptom. The GAD-7 consists of 7 items, with each item offering four response options: \"not at all,\" \"several days,\" \"more than a week,\" and \"nearly every day,\" corresponding to scores of 0, 1, 2, and 3, respectively. The higher the score, the more severe the anxiety symptom. Based on the criteria provided by the scale and summed score, the participants were categorized into the following groups: normal (0\u0026ndash;4), mild anxiety (5\u0026ndash;9), and severe anxiety (\u0026ge;\u0026thinsp;10).\u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec8\" class=\"Section2\"\u003e \u003ch2\u003eGrouping and statistical analysis\u003c/h2\u003e \u003cp\u003eThe statistical analysis was performed by SPSS (version 23.0, IBM, New York, USA). Quantitative data normally distributed were described by the mean and standard deviation (mean\u0026thinsp;\u0026plusmn;\u0026thinsp;SD) while non-normally distributed data were described as quartiles (\u003cem\u003eP\u003c/em\u003e25\u0026thinsp;~\u0026thinsp;\u003cem\u003eP\u003c/em\u003e75). Qualitative data were described by percentage or ratio. Student's t (\u003cem\u003et\u003c/em\u003e) test, Pearson chi-squared (\u003cem\u003eχ\u003c/em\u003e\u003csup\u003e\u003cem\u003e2\u003c/em\u003e\u003c/sup\u003e) test, Wilcoxon rank sum (\u003cem\u003ez\u003c/em\u003e) test, ANOVA (\u003cem\u003eF\u003c/em\u003e) test and \u003cem\u003eLSD\u003c/em\u003e test were used to compare differences between groups. Multivariate logistic regression analysis was used to exploring risk factors for SHS, by which odds ratio (\u003cem\u003eOR\u003c/em\u003e) and 95% confidence intervals (\u003cem\u003eCI\u003c/em\u003e) were obtained. \u003cem\u003eP\u003c/em\u003e\u0026thinsp;\u0026lt;\u0026thinsp;0.05 was considered statistically significant.\u003c/p\u003e \u003cp\u003e For comparison of GAD-7 and BDI-Ⅱ scores, participants were divided by quartile method based on shsq-25 scores into 4 groups as follows: Group A) SHSQ-25 score\u0026thinsp;\u0026le;\u0026thinsp;7, Group B) SHSQ-25 score 8\u0026ndash;14, Group C) SHSQ-25 score 15\u0026ndash;22, Group D) SHSQ-25 score\u0026thinsp;\u0026ge;\u0026thinsp;23.\u003c/p\u003e \u003c/div\u003e"},{"header":"Results","content":"\u003cdiv id=\"Sec10\" class=\"Section2\"\u003e \u003ch2\u003eCharacteristics of participants\u003c/h2\u003e \u003cp\u003eThe characteristics of 1904 eligible students participated in the survey as shown in Table\u0026nbsp;\u003cspan refid=\"Tab1\" class=\"InternalRef\"\u003e1\u003c/span\u003e. Among 1904 students, 10.3% (197/1904) had SHS, and 89.7% (1707/1904) had optimal health (OPH). By comparing two groups, there were statistically significant difference on age (\u003cem\u003eP\u003c/em\u003e\u0026lt;0.001), gender (\u003cem\u003eP\u003c/em\u003e\u0026thinsp;=\u0026thinsp;0.004), average daily sleep time (\u003cem\u003eP\u003c/em\u003e\u0026lt;0.001), smoking status (\u003cem\u003eP\u003c/em\u003e\u0026lt;0.001), drinking behavior (\u003cem\u003eP\u003c/em\u003e\u0026lt;0.001), and exercise frequency (\u003cem\u003eP\u003c/em\u003e\u0026lt;0.001).\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab1\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 1\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eCharacteristics of participants\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"8\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c6\" colnum=\"6\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c7\" colnum=\"7\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c8\" colnum=\"8\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eVariables\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003en\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"2\" nameend=\"c4\" namest=\"c3\"\u003e \u003cp\u003eOPH\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;1707 (89.7%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"2\" nameend=\"c6\" namest=\"c5\"\u003e \u003cp\u003eSHS\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;197 (10.3%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u003cem\u003eχ\u003c/em\u003e\u003csup\u003e2\u003c/sup\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u003cem\u003eP\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAge (years)\u003csup\u003e* *\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e17.031\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e12\u0026ndash;14\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e679\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e635 (93.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e44 (6.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e15\u0026ndash;17\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1148\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1005 (87.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e143 (12.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u0026ge;\u0026thinsp;18\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e77\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e67 (87.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e10 (13.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eGender\u003csup\u003e*\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMale\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e978\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e896 (91.6)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e82 (8.4)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e8.347\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e0.004\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eFemale\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e926\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e811 (87.6)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e115 (12.4)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBMI\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e2.323\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e0.508\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eThin\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e898\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e810 (90.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e88 (9.8)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNormal\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e770\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e692 (89.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e78 (10.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eOverweight\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e112\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e97 (86.6)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e15 (13.4)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eObese\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e124\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e108 (87.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e16 (12.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAcademic record\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e8.866\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e0.065\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u0026lt;10%\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e294\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e272 (92.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e22 (7.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e10%-30%\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e450\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e412 (91.6)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e38 (8.4)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e30%-50%\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e561\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e489 (87.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e72 (12.8)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e50%-70%\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e385\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e346 (89.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e39 (10.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u0026gt;70%\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e214\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e188 (87.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e26 (12.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLeft-behind children\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e0.125\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e0.724\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eYes\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e78\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e69 (88.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e9 (11.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNo\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1826\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1638 (89.7)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e188 (10.3)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eLive in campus\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e2.155\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e0.142\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eYes\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e220\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e191 (86.8)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e29 (13.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNo\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1684\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1516 (90.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e168 (10.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAverage daily sleep time\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e107.861\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u0026lt;6 hours\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e195\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e133 (68.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e62 (31.8)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e6\u0026ndash;8 hours\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1501\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1381 (92.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e120 (8.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u0026gt;8 hours\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e208\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e193 (92.8)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e15 (7.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSmoking status\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e37.673\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eYes\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e177\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e135 (76.3)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e42 (23.7)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNo\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1727\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1572 (91.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e155 (9.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDrinking behavior\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e82.803\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eYes\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e70\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e40 (57.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e30 (42.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNo\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1834\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1667 (90.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e167 (9.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eExercise frequency\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e73.125\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSeldom or never\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e125\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e84 (67.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e41 (32.8)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eOccasionally\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1244\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1131 (90.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e113 (9.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eFrequently\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e535\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e492 (92.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e43 (8.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003ctfoot\u003e \u003ctr\u003e\u003ctd colspan=\"8\"\u003e\u003csup\u003e*\u003cem\u003eP\u003c/em\u003e\u0026lt;0.05, ** \u003cem\u003eP\u003c/em\u003e\u0026lt;0.001\u003c/sup\u003e\u003c/td\u003e\u003c/tr\u003e \u003c/tfoot\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec11\" class=\"Section2\"\u003e \u003ch2\u003ePsychological states of participants\u003c/h2\u003e \u003cp\u003eAs shown in Table\u0026nbsp;\u003cspan refid=\"Tab2\" class=\"InternalRef\"\u003e2\u003c/span\u003e, SHS middle school students had statistically higher mean GAD-7 score (11.53 versus 2.60, \u003cem\u003eP\u003c/em\u003e\u0026lt;0.001) and BDI-Ⅱ (30.91 versus 9.11, \u003cem\u003eP\u003c/em\u003e\u0026lt;0.001) compared with OPH middle school students. And as the levels of anxiety and depression symptoms intensify, the rate of SHS increased.\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab2\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 2\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eComparison of mean scores of GAD-7 and BDI-Ⅱ, and degree of symptoms between OPH and SHS groups.\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"8\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c6\" colnum=\"6\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c7\" colnum=\"7\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c8\" colnum=\"8\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e \u003cp\u003eVariables\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003en\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"2\" nameend=\"c4\" namest=\"c3\"\u003e \u003cp\u003eOPH\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;1707 (89.7%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"2\" nameend=\"c6\" namest=\"c5\"\u003e \u003cp\u003eSHS\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;197 (10.3%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u003cem\u003et\u003c/em\u003e/\u003cem\u003ez\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u003cem\u003eP\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eGAD-7\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1904\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e2.60\u0026thinsp;\u0026plusmn;\u0026thinsp;3.10\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e11.53\u0026thinsp;\u0026plusmn;\u0026thinsp;5.60\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e-34.484\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNormal\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1319\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1301 (76.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e18 (9.1)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e488.940\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMild\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e424\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e356 (20.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e68 (34.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSevere\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e161\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e50 (2.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e111 (56.4)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBDI-Ⅱ\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1904\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e9.11\u0026thinsp;\u0026plusmn;\u0026thinsp;9.49\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e30.91\u0026thinsp;\u0026plusmn;\u0026thinsp;12.39\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e-29.481\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eNormal\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1255\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1238 (72.5)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e17 (8.6)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e \u003cp\u003e454.443\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMild\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e240\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e220 (12.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e20 (10.2)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eModerate\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e210\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e170 (10.0)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e40 (20.3)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSevere\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e199\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e79 (14.6)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e120 (60.9)\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c7\" namest=\"c6\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec12\" class=\"Section2\"\u003e \u003ch2\u003eLogistic regression analysis on SHS\u003c/h2\u003e \u003cp\u003eAs shown in Table\u0026nbsp;\u003cspan refid=\"Tab3\" class=\"InternalRef\"\u003e3\u003c/span\u003e, the multivariate regression analysis with whether had SHS as the dependent variable was performed to identify major influences showed that average sleep time (\u003cem\u003eP\u003c/em\u003e\u0026thinsp;=\u0026thinsp;0.017), GAD-7 (\u003cem\u003eP\u003c/em\u003e\u0026lt;0.001) and BDI-Ⅱ (\u003cem\u003eP\u003c/em\u003e\u0026lt;0.001) were positively associated with SHS. Compared with sleeping less than six hours, 6\u0026ndash;8 hours is a protective factor for SHS (\u003cem\u003eOR\u003c/em\u003e\u0026thinsp;=\u0026thinsp;0.486, 95%\u003cem\u003eCI\u003c/em\u003e\u0026thinsp;=\u0026thinsp;0.278\u0026ndash;0.851). As the score of GAD-7 and BDI-Ⅱ increased, adolescents were 1.327 times and 1.082 times increased risk of developing SHS, respectively.\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab3\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 3\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eMultivariate logistic regression analysis for SHS\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"10\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c6\" colnum=\"6\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c7\" colnum=\"7\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c8\" colnum=\"8\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c9\" colnum=\"9\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c10\" colnum=\"10\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e\u0026nbsp;\u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003e\u003cem\u003eΒ\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"2\" nameend=\"c4\" namest=\"c3\"\u003e \u003cp\u003eSE\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"2\" nameend=\"c6\" namest=\"c5\"\u003e \u003cp\u003eWald\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u003cem\u003eP\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"2\" nameend=\"c9\" namest=\"c8\"\u003e \u003cp\u003eExp(B) 95% CI\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colspan=\"1\" nameend=\"c10\" namest=\"c10\"\u003e\u0026nbsp;\u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMale\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e-0.227\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.239\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e0.904\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.191\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e0.797 (0.499\u0026ndash;1.273)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAge\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e3.326\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.190\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e15\u0026ndash;17\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.429\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.263\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e2.663\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.103\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e1.535 (0.917\u0026ndash;2.569)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u0026gt;18\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.695\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.531\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e1.713\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.191\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e2.003 (0.708\u0026ndash;5.668)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eAverage sleep time\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e8.146\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.017\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e6\u0026ndash;8 hours\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e-0.721\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.285\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e6.376\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.012\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e0.486 (0.278\u0026ndash;0.851)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003e\u0026gt;8 hours\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e-0.067\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.456\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e0.021\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.884\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e0.936 (0.383\u0026ndash;2.288)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSmoking\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e-0.002\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.417\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e0.000\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.996\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e0.998 (0.440\u0026ndash;2.262)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDrinking\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.549\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.514\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e1.140\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.286\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e1.731 (0.632\u0026ndash;4.742)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eExercise\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e\u0026nbsp;\u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e1.664\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.435\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e\u0026nbsp;\u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eSeldom or never\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.045\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.422\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e0.012\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.914\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e1.046 (0.458\u0026ndash;2.392)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eOccasionally\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e-0.288\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.280\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e1.052\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e0.305\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e0.750 (0.433\u0026ndash;1.299)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eGAD-7\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.283\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.029\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e92.061\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e1.327 (1.252\u0026ndash;1.406)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBDI-Ⅱ\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.079\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.011\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c5\" namest=\"c4\"\u003e \u003cp\u003e51.003\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"3\" nameend=\"c8\" namest=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colspan=\"2\" nameend=\"c10\" namest=\"c9\"\u003e \u003cp\u003e1.082 (1.059\u0026ndash;1.106)\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec13\" class=\"Section2\"\u003e \u003ch2\u003eCorrelation between PS and SHS\u003c/h2\u003e \u003cp\u003eAmong the students participated in the survey, there were statistically differences in the average GAD-7 and BDI-Ⅱ scores between all four quartiles of the SHS scores (all \u003cem\u003eP\u003c/em\u003e\u0026lt;0.001), and the score of GAD-7 and BDI-Ⅱ increased significantly with increasing SHS quartile scores (Table\u0026nbsp;\u003cspan refid=\"Tab4\" class=\"InternalRef\"\u003e4\u003c/span\u003e).\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab4\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 4\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eComparison of GAD-7 and BDI-Ⅱ scores of adolescents grouped by SHSQ-25 quartile\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"8\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c6\" colnum=\"6\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c7\" colnum=\"7\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c8\" colnum=\"8\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e\u0026nbsp;\u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eGroup A\u003c/p\u003e \u003cp\u003e(n\u0026thinsp;=\u0026thinsp;487)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eGroup B\u003c/p\u003e \u003cp\u003e(n\u0026thinsp;=\u0026thinsp;470)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003eGroup C\u003c/p\u003e \u003cp\u003e(n\u0026thinsp;=\u0026thinsp;479)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003eGroup D\u003c/p\u003e \u003cp\u003e(n\u0026thinsp;=\u0026thinsp;468)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u003cem\u003eF\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u003cem\u003eP\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c8\"\u003e \u003cp\u003e\u003cem\u003eLSD\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eGAD-7\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.69\u0026thinsp;\u0026plusmn;\u0026thinsp;1.62\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1.95\u0026thinsp;\u0026plusmn;\u0026thinsp;2.43\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e3.45\u0026thinsp;\u0026plusmn;\u0026thinsp;2.77\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e8.13\u0026thinsp;\u0026plusmn;\u0026thinsp;5.45\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e440.270\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. D\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. D\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eC vs. D\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eBDI-Ⅱ\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e3.00\u0026thinsp;\u0026plusmn;\u0026thinsp;5.03\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e8.09\u0026thinsp;\u0026plusmn;\u0026thinsp;8.44\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e11.26\u0026thinsp;\u0026plusmn;\u0026thinsp;9.02\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e23.45\u0026thinsp;\u0026plusmn;\u0026thinsp;12.73\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e424.488\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c8\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. D\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. D\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eC vs. D\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003ctfoot\u003e \u003ctr\u003e\u003ctd colspan=\"8\"\u003e\u003csup\u003e** \u003cem\u003eP\u003c/em\u003e\u0026lt;0.001\u003c/sup\u003e\u003c/td\u003e\u003c/tr\u003e \u003c/tfoot\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003cp\u003eCompared with non-anxiety group, the average SHS specific domains scores of mental health status, immune system, digestive tract, cardiovascular health and fatigue were statistically significantly increased among the students who had anxiety symptom (Table\u0026nbsp;\u003cspan refid=\"Tab5\" class=\"InternalRef\"\u003e5\u003c/span\u003e). Similarly, the depression group scored higher in each dimension of SHS than non-depression group (Table\u0026nbsp;\u003cspan refid=\"Tab6\" class=\"InternalRef\"\u003e6\u003c/span\u003e).\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab5\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 5\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eComparison of the scores of the five domains of SHSQ-25 between the non-anxiety and anxiety groups depending on GAD-7 scores\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"5\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e\u0026nbsp;\u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003enon-anxiety\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;1319 (69.28%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eanxiety\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;585 (30.72%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003e\u003cem\u003et\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u003cem\u003eP\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMental state\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e3.83\u0026thinsp;\u0026plusmn;\u0026thinsp;3.51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e10.00\u0026thinsp;\u0026plusmn;\u0026thinsp;5.80\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-28.609\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eImmune system\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e3.83\u0026thinsp;\u0026plusmn;\u0026thinsp;3.51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e10.00\u0026thinsp;\u0026plusmn;\u0026thinsp;5.80\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-17.219\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDigestive tract\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1.07\u0026thinsp;\u0026plusmn;\u0026thinsp;1.53\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e2.75\u0026thinsp;\u0026plusmn;\u0026thinsp;2.24\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-19.021\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCardiovascular system\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.43\u0026thinsp;\u0026plusmn;\u0026thinsp;0.95\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1.95\u0026thinsp;\u0026plusmn;\u0026thinsp;2.31\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-20.358\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eFatigue\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e5.24\u0026thinsp;\u0026plusmn;\u0026thinsp;3.57\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e11.48\u0026thinsp;\u0026plusmn;\u0026thinsp;5.95\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-28.221\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTotal score\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e11.91\u0026thinsp;\u0026plusmn;\u0026thinsp;8.58\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e28.83\u0026thinsp;\u0026plusmn;\u0026thinsp;15.28\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-30.738\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab6\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 6\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eComparison of the scores of the five domains of SHSQ-25 between the non-depression and depression groups depending on BDI-Ⅱ scores\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"5\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e\u0026nbsp;\u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003enon-depression\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;1255 (65.91%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003edepression\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;649 (34.09%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003e\u003cem\u003et\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u003cem\u003eP\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMental status\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e3.73\u0026thinsp;\u0026plusmn;\u0026thinsp;3.52\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e9.58\u0026thinsp;\u0026plusmn;\u0026thinsp;5.70\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-27.528\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eImmune system\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1.35\u0026thinsp;\u0026plusmn;\u0026thinsp;1.35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e2.49\u0026thinsp;\u0026plusmn;\u0026thinsp;2.03\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-14.575\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDigestive tract\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1.01\u0026thinsp;\u0026plusmn;\u0026thinsp;1.40\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e2.71\u0026thinsp;\u0026plusmn;\u0026thinsp;2.30\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-20.031\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCardiovascular system\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e0.41\u0026thinsp;\u0026plusmn;\u0026thinsp;0.96\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1.84\u0026thinsp;\u0026plusmn;\u0026thinsp;2.22\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-19.452\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eFatigue\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e5.14\u0026thinsp;\u0026plusmn;\u0026thinsp;3.51\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e11.04\u0026thinsp;\u0026plusmn;\u0026thinsp;5.93\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-27.207\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTotal score\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e11.66\u0026thinsp;\u0026plusmn;\u0026thinsp;8.54\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e27.66\u0026thinsp;\u0026plusmn;\u0026thinsp;15.13\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e-29.465\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003c/div\u003e \u003cdiv id=\"Sec14\" class=\"Section2\"\u003e \u003ch2\u003eCorrelation between sleep and SHS\u003c/h2\u003e \u003cp\u003eAs shown in Table\u0026nbsp;\u003cspan refid=\"Tab7\" class=\"InternalRef\"\u003e7\u003c/span\u003e, the average daily sleep time of students had a significant inverse association with SHS score. There were statistical differences between the total SHS score and score of each domain among three groups categorized by average daily sleep time (all \u003cem\u003eP\u003c/em\u003e\u0026lt;0.001), and differences existed between each group. Specifically, with a decrease in sleep time, the score of each domain of SHS increased significantly.\u003c/p\u003e \u003cp\u003e \u003cdiv class=\"gridtable\"\u003e\u003ctable float=\"Yes\" id=\"Tab7\" border=\"1\"\u003e \u003ccaption language=\"En\"\u003e \u003cdiv class=\"CaptionNumber\"\u003eTable 7\u003c/div\u003e \u003cdiv class=\"CaptionContent\"\u003e \u003cp\u003eComparison of the scores of the five domains of SHSQ-25 between the groups depending on average daily sleep time\u003c/p\u003e \u003c/div\u003e \u003c/caption\u003e \u003ccolgroup cols=\"7\"\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c1\" colnum=\"1\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c2\" colnum=\"2\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c3\" colnum=\"3\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c4\" colnum=\"4\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c5\" colnum=\"5\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c6\" colnum=\"6\"\u003e\u003c/div\u003e \u003cdiv align=\"left\" class=\"colspec\" colname=\"c7\" colnum=\"7\"\u003e\u003c/div\u003e \u003cthead\u003e \u003ctr\u003e \u003cth align=\"left\" colname=\"c1\"\u003e\u0026nbsp;\u003c/th\u003e \u003cth align=\"left\" colname=\"c2\"\u003e \u003cp\u003eGroup 1\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;195 (10.24%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c3\"\u003e \u003cp\u003eGroup 2\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;1501 (78.83%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c4\"\u003e \u003cp\u003eGroup 3\u003c/p\u003e \u003cp\u003en\u0026thinsp;=\u0026thinsp;208 (10.92%)\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c5\"\u003e \u003cp\u003e\u003cem\u003eF\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u003cem\u003eP\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003cth align=\"left\" colname=\"c7\"\u003e \u003cp\u003e\u003cem\u003eLSD\u003c/em\u003e\u003c/p\u003e \u003c/th\u003e \u003c/tr\u003e \u003c/thead\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eMental status\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e8.78\u0026thinsp;\u0026plusmn;\u0026thinsp;6.62\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e5.54\u0026thinsp;\u0026plusmn;\u0026thinsp;4.85\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e4.24\u0026thinsp;\u0026plusmn;\u0026thinsp;5.02\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e45.253\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e*\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eImmune system\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e2.46\u0026thinsp;\u0026plusmn;\u0026thinsp;2.45\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1.70\u0026thinsp;\u0026plusmn;\u0026thinsp;1.61\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e1.31\u0026thinsp;\u0026plusmn;\u0026thinsp;1.21\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e25.081\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e*\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eDigestive tract\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e2.83\u0026thinsp;\u0026plusmn;\u0026thinsp;2.99\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e1.49\u0026thinsp;\u0026plusmn;\u0026thinsp;1.71\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e1.13\u0026thinsp;\u0026plusmn;\u0026thinsp;1.82\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e49.937\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e*\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eCardiovascular system\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e1.55\u0026thinsp;\u0026plusmn;\u0026thinsp;2.56\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e0.88\u0026thinsp;\u0026plusmn;\u0026thinsp;1.56\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e0.41\u0026thinsp;\u0026plusmn;\u0026thinsp;0.91\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e25.236\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eFatigue\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e10.99\u0026thinsp;\u0026plusmn;\u0026thinsp;7.23\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e6.94\u0026thinsp;\u0026plusmn;\u0026thinsp;4.82\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e5.13\u0026thinsp;\u0026plusmn;\u0026thinsp;4.63\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e73.038\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003ctr\u003e \u003ctd align=\"left\" colname=\"c1\"\u003e \u003cp\u003eTotal score\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c2\"\u003e \u003cp\u003e26.62\u0026thinsp;\u0026plusmn;\u0026thinsp;19.00\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c3\"\u003e \u003cp\u003e16.55\u0026thinsp;\u0026plusmn;\u0026thinsp;12.35\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c4\"\u003e \u003cp\u003e12.22\u0026thinsp;\u0026plusmn;\u0026thinsp;11.55\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c5\"\u003e \u003cp\u003e67.133\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c6\"\u003e \u003cp\u003e\u0026lt;0.001\u003c/p\u003e \u003c/td\u003e \u003ctd align=\"left\" colname=\"c7\"\u003e \u003cp\u003eA vs. B\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eA vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003cp\u003eB vs. C\u003csup\u003e**\u003c/sup\u003e\u003c/p\u003e \u003c/td\u003e \u003c/tr\u003e \u003c/tbody\u003e \u003c/colgroup\u003e \u003ctfoot\u003e \u003ctr\u003e\u003ctd colspan=\"7\"\u003e\u003csup\u003eGroup 1) \u0026lt;6 hours, Group 2) 6\u0026ndash;8 hours, Group 3) \u0026gt;8 hours, * \u003cem\u003eP\u003c/em\u003e\u0026lt;0.05, ** \u003cem\u003eP\u003c/em\u003e\u0026lt;0.001\u003c/sup\u003e\u003c/td\u003e\u003c/tr\u003e \u003c/tfoot\u003e \u003c/table\u003e\u003c/div\u003e \u003c/p\u003e \u003c/div\u003e"},{"header":"Discussion","content":"\u003cp\u003eThe WHO defined health as the state of complete physical, mental, and social well-being, and not merely the absence of disease or infirmity[\u003cspan citationid=\"CR5\" class=\"CitationRef\"\u003e5\u003c/span\u003e]. SHS may not always correspond to either the early stage or preclinical phase of an illness, but it is typically defined as the period preceding the onset of clinical manifestations of diseases. Individuals in the early stage or preclinical period often require interventions with specific therapies aimed at preventing or delaying the onset of the disease[\u003cspan citationid=\"CR28\" class=\"CitationRef\"\u003e28\u003c/span\u003e]. Modifiable risk factors, in particular, play a crucial role in implementing targeted, cost-effective prevention measures for illnesses in the population. Adolescence is a critical period of physical, psychological and social adaptation. However, China's environmental pollution and rapid changes in lifestyle have widely affected people's health conditions and greatly increased the risk of SHS[\u003cspan citationid=\"CR9\" class=\"CitationRef\"\u003e9\u003c/span\u003e]. At the same time, SHS is also a major challenge faced by the global public health[\u003cspan citationid=\"CR29\" class=\"CitationRef\"\u003e29\u003c/span\u003e, \u003cspan citationid=\"CR30\" class=\"CitationRef\"\u003e30\u003c/span\u003e]. With the rapid development of the social economy, various cultures, pressures, values, lifestyle behaviors, etc., swiftly infiltrate the adolescents, significantly impacting the immature physical and mental aspects, leading to an increasing prevalence of SHS among adolescents. The research findings revealed that among 1904 middle school students, a total of 197 (10.35%) were identified SHS. Previous research on people aged 15\u0026ndash;60 in China showed that the prevalence of SHS was 46.3%, which was higher than current study[\u003cspan citationid=\"CR31\" class=\"CitationRef\"\u003e31\u003c/span\u003e]. And the research conducted in Chinese universities showed the prevalence of SHS among college students was 21.0%, which was also higher than current study[\u003cspan citationid=\"CR32\" class=\"CitationRef\"\u003e32\u003c/span\u003e]. The SHS rate among adolescents was slightly lower compared to the general population, which may be attributed to the fact that SHS tends to increase with age[\u003cspan citationid=\"CR12\" class=\"CitationRef\"\u003e12\u003c/span\u003e]. However, this by no means implies that SHS in adolescents should be overlooked. Instead, we should pay more attention to SHS in adolescents. Adolescents develop rapidly physically and mentally but are immature, while simultaneously facing a series of external pressures such as academic, employment, and emotional challenges, leading to a gradual prevalence of SHS[\u003cspan citationid=\"CR33\" class=\"CitationRef\"\u003e33\u003c/span\u003e]. SHS may be a pathway to a\u003c/p\u003e \u003cp\u003ewhole lifespan, determining the increased cause of health risk in old age and it is recognized that early diagnosis and timely management can prevent the occurrence of SHS[\u003cspan citationid=\"CR34\" class=\"CitationRef\"\u003e34\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eAdolescents with SHS often manifests in daily life as low energy and a state of fatigue, severely impacting the academic performance and healthy growth of adolescents[\u003cspan citationid=\"CR6\" class=\"CitationRef\"\u003e6\u003c/span\u003e]. At the same time, SHS is associated with internalizing issues such as anxiety and depression[\u003cspan citationid=\"CR12\" class=\"CitationRef\"\u003e12\u003c/span\u003e], consistent with the results obtained in this study focusing on the middle school students. In the present study, the prevalence of depressive symptoms and anxiety symptoms are 34.09% and 30.72%, respectively, which is consistent with those reported by other studies[\u003cspan citationid=\"CR35\" class=\"CitationRef\"\u003e35\u003c/span\u003e, \u003cspan citationid=\"CR36\" class=\"CitationRef\"\u003e36\u003c/span\u003e]. The PS of Chinese adolescents is not optimistic. The present study showed that compared with students without PS, the prevalence of SHS among students with depression and anxiety symptoms were 91.4% and 90.9%, respectively (Table\u0026nbsp;\u003cspan refid=\"Tab2\" class=\"InternalRef\"\u003e2\u003c/span\u003e), which were extremely high. And through multivariate logistic regression, it was found that as the scores of GAD-7 and BDI-Ⅱ increased, adolescents were 1.33 times and 1.08 times increased risk of developing SHS, respectively (Table\u0026nbsp;\u003cspan refid=\"Tab3\" class=\"InternalRef\"\u003e3\u003c/span\u003e). Another finding was that as the SHS score increased, both the GAD-7 and BDI-Ⅱ scores increased in the same direction (Table\u0026nbsp;\u003cspan refid=\"Tab4\" class=\"InternalRef\"\u003e4\u003c/span\u003e). In addition, the five domain scores and total score of SHS were significantly higher in the groups of students who had anxiety or depression symptom (Tables\u0026nbsp;\u003cspan refid=\"Tab5\" class=\"InternalRef\"\u003e5\u003c/span\u003e and \u003cspan refid=\"Tab6\" class=\"InternalRef\"\u003e6\u003c/span\u003e). According to the results of this study, a strong correlation can be identified between PS and SHS. The reasons for adolescents' susceptibility to psychological issues such as depression or anxiety are complex and involve multiple factors. Firstly, physiological changes are a significant characteristic of adolescence, and these changes during this period may have a significant impact on emotional and PS. The hormonal levels fluctuate during adolescence, with an increase in the secretion of sex hormones and growth hormones promoting rapid physical growth and development, the hormonal fluctuation may lead to emotional swings[\u003cspan citationid=\"CR37\" class=\"CitationRef\"\u003e37\u003c/span\u003e, \u003cspan citationid=\"CR38\" class=\"CitationRef\"\u003e38\u003c/span\u003e]. In addition, heavy academic pressure is a significant challenge faced by adolescents, especially in middle school stage, which may have a huge impact on the psychological well-being of Chinese adolescents[\u003cspan citationid=\"CR39\" class=\"CitationRef\"\u003e39\u003c/span\u003e, \u003cspan citationid=\"CR40\" class=\"CitationRef\"\u003e40\u003c/span\u003e]. Adolescents need to cope with numerous exams and academic assessments, such as high school or university entrance exams, which are extremely crucial in China and are likely result in anxiety and depression among adolescents. Meanwhile, these intense competitions mean that students must perform better academically for better prospects. This kind of competition often adds a considerable amount of anxiety and pressure to them. Furthermore, middle school students may feel overwhelmed by academic burdens, including a substantial amount of homework and extracurricular tutoring, leaving them with insufficient time for physical and mental rest. Faced with these pressures, students may experience feelings of frustration, anxiety, and even depression[\u003cspan citationid=\"CR41\" class=\"CitationRef\"\u003e41\u003c/span\u003e]. Psychological stress is a type of negative emotional state. Chronic social psychological stress caused by long-term psychological stress may lead to SHS by the changed profiling of serum cortisol level and glucocorticoid receptor[\u003cspan citationid=\"CR42\" class=\"CitationRef\"\u003e42\u003c/span\u003e, \u003cspan citationid=\"CR43\" class=\"CitationRef\"\u003e43\u003c/span\u003e]. Adolescents may also experience PS due to the excessive expectations from parents[\u003cspan citationid=\"CR44\" class=\"CitationRef\"\u003e44\u003c/span\u003e]. The intense competitions, academic burdens, physiological changes and excessive expectations affect the physical and mental health of adolescents in China, resulting in poor health status. For example, if the symptoms of depression and anxiety are not well managed, they will increase the risk of suffering cardiovascular diseases[\u003cspan citationid=\"CR45\" class=\"CitationRef\"\u003e45\u003c/span\u003e, \u003cspan citationid=\"CR46\" class=\"CitationRef\"\u003e46\u003c/span\u003e].\u003c/p\u003e \u003cp\u003eIn the OPH group, the proportion of sleep time less than 6 hours was lower than that of SHS group. The results of multivariate logistic regression analysis with whether had SHS as the dependent variable also showed that compared with students sleep less than 6 hours, sleeping 6\u0026ndash;8 hours is a significant protective factor (\u003cem\u003eP\u003c/em\u003e\u0026thinsp;=\u0026thinsp;0.012) for SHS (Table\u0026nbsp;\u003cspan refid=\"Tab3\" class=\"InternalRef\"\u003e3\u003c/span\u003e). In addition, with the increase in sleeping time, the scores of each dimension of SHS decreased (Table\u0026nbsp;\u003cspan refid=\"Tab7\" class=\"InternalRef\"\u003e7\u003c/span\u003e). The explanation to the observed finding may owe to the shared common characteristics between SHS and insufficient sleep, particularly the relevant items in the questionnaires and the common predisposing factors associated with their causes. These results indicate that adequate sleeping time helps reduce the risk of SHS. Previous studies have indicated that sufficient sleep contributes to reducing psychological stress and helps maintain both physical and mental well-being[\u003cspan citationid=\"CR47\" class=\"CitationRef\"\u003e47\u003c/span\u003e, \u003cspan citationid=\"CR48\" class=\"CitationRef\"\u003e48\u003c/span\u003e]. Sleep is an important factor in promoting physical growth and development in adolescents and helps the maintenance of normal bodily functions[\u003cspan citationid=\"CR48\" class=\"CitationRef\"\u003e48\u003c/span\u003e]. Moreover, numerous studies have proven that sufficient sleep helps strengthen the immune system, enabling adolescents more resistant to disease[\u003cspan citationid=\"CR49\" class=\"CitationRef\"\u003e49\u003c/span\u003e], and the regular sleep pattern contributes to maintaining normal metabolic functions, preventing obesity, and other metabolic issues[\u003cspan citationid=\"CR50\" class=\"CitationRef\"\u003e50\u003c/span\u003e, \u003cspan citationid=\"CR51\" class=\"CitationRef\"\u003e51\u003c/span\u003e]. Adequate sleep also helps improve PS. It was reported previously that sufficient sleep can alleviate anxiety and depressive feelings, contributing to emotional stability and psychological well-being[\u003cspan citationid=\"CR52\" class=\"CitationRef\"\u003e52\u003c/span\u003e]. This, in turn, helps adolescents better cope with the pressures and challenges of daily life. For middle school students, adequate sleep is crucial for learning, memory and attention[\u003cspan citationid=\"CR53\" class=\"CitationRef\"\u003e53\u003c/span\u003e]. It helps enhance learning efficiency and academic performance. The current study indicates that adolescents who get less sleep are more susceptible to SHS. The coexistence of SHS and insufficient sleep will aggravate in terms of worse life quality, higher health risks, lower study efficiency and less happiness.\u003c/p\u003e \u003cp\u003eThis research has confirmed a significant correlation between SHS and anxiety, depression among middle school students, with inadequate sleep of less than 6 hours being identified as a predictive factor for SHS. From the perspective of public health, identifying modifiable risk factors, predicting, preventing and performing early personalized interventions are highly important for preventing and reducing the risk of disease. For middle school students, physical health is just as important as mental health. SHSQ-25 can be used to screen for SHS groups, and combined with physical examination indicators, personalized interventions can be implemented in future work to extend life expectancy.\u003c/p\u003e \u003cdiv id=\"Sec16\" class=\"Section2\"\u003e \u003ch2\u003eLimitations\u003c/h2\u003e \u003cp\u003eThe cross-sectional study data were derived from self-administered questionnaires. Students surveyed need to recall information about themselves, which may lead to recall bias. Additionally, regarding certain sensitive questions, there was a possibility of exaggeration or concealment, resulting in socially desirable responses and causing reporting bias. In addition, the study was a cross-sectional study, making it difficult to infer a casual relationship between PS and SHS, further longitudinal studies were needed to infer causal relationships between variables.\u003c/p\u003e \u003c/div\u003e"},{"header":"Conclusions","content":"\u003cp\u003eThe prevalence of SHS and PS among middle school students in China are relatively high. The study demonstrated that that adolescents experiencing anxiety, depression, and insufficient sleep are more prone to SHS. From the perspectives of public health, strategies for early, personalised intervention at the SHS stage are urgently needed to improve the mental health of adolescents and enhance their coping and adaptability skills. The sleep condition is also worth noting, and it is essential to ensure that adolescents obtain sufficient sleep.\u003c/p\u003e \u003cp\u003eOverall, the SHS among middle school students shows a worrying trend, significantly compromising their normal healthy development and impacting the comprehensive enhancement of their life. Although SHS is not a disease, it still has an important negative impact on adolescents. Therefore, it is crucial to prioritize and take measures to prevent SHS among adolescents. To prevent the occurrence of SHS among adolescents, comprehensive measures need to be implemented. These measures encompass not only developing good sleeping habits to ensure sufficient sleep, but also enhancing social and emotional support, improving dietary habits, increasing physical activity, and elevating the overall health level of adolescents. Parents, schools, and society also need to provide more attention and support to adolescents. The health department should take the lead in collaboration with education, civil affairs, and other relevant departments to guide adolescents and their guardians in forming a health management mindset. Simultaneously, emphasis should be placed on the collaboration between families and schools, with widespread participation from both, ensuring quality outdoor activities while implementing educational measures to reduce stress. Prioritizing health care and regular check-ups, promoting balanced nutrition, and comprehensive prevention strategies are crucial for addressing SHS among adolescents.\u003c/p\u003e "},{"header":"Abbreviations","content":"\u003cdiv class=\"DefinitionList\"\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eSHS\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eSuboptimal health status\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eOPH\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eoptimal health\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003ePS\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003epsychological symptoms\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eWHO\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eWorld Health Organization\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eBMI\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003ebody mass index\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eSHSQ-25\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eSuboptimal Health Status Questionnaire-25\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eBDI-Ⅱ\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eBeck Depression Inventory-Ⅱ\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eGAD-7\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eGeneralized Anxiety Disorder Scale\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eOR\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eodds ratio\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eCI\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003econfidence intervals\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eGR\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eglucocorticoid\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003cdiv class=\"DefinitionListEntry\"\u003e \u003cdiv class=\"Term\"\u003eIgG\u003c/div\u003e \u003cdiv class=\"Description\"\u003e \u003cp\u003eimmunoglobulin G.\u003c/p\u003e \u003c/div\u003e \u003c/div\u003e \u003c/div\u003e"},{"header":"Declarations","content":"\u003cp\u003e\u003cstrong\u003eData Availability Statement\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThe datasets used and analyzed in the study are available from the corresponding author on reasonable request.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eFunding\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThis research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompeting interests\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThe authors declare no conflict of interest.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eEthics approval\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eThis study was approved by the Ethics Committee of Shantou University Medical School (No. SUMC-2022-076) and we had also obtained the consent of participants. All participants were required to sign an informed consent before being enrolled in this study.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eConsent to participate\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eInformed consent was obtained from all subjects involved in the study.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eConsent for publication\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eAll the authors had complete access to the manuscript and agreed to submit it for publication.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eCode availability\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eNot applicable.\u003c/p\u003e\n\u003cp\u003e\u003cstrong\u003eAuthor contributions\u003c/strong\u003e\u003c/p\u003e\n\u003cp\u003eZ.Z. and C.S. undertook the data analysis, wrote down the research process and literature reviews, and interpreted the results. Z.X. and C.H. performed the data collection, complete statistical tables, and result analysis. L.L. was in charge of the conception, undertook the design of the study framework, took responsibility for the integrity of the data and the accuracy of the data, and interpreted the conclusion.\u003c/p\u003e"},{"header":"References","content":"\u003col\u003e\u003cli\u003e\u003cspan\u003eHuang Y, Wang Y, Wang H, Liu Z, Yu X, Yan J, Yu Y, Kou C, Xu X, Lu J, et al. Prevalence of mental disorders in China: a cross-sectional epidemiological study. Lancet Psychiatry. 2019;6(3):211\u0026ndash;24.\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eHuang Y, Liu Z, Wang H, Guan X, Chen H, Ma C, Li Q, Yan J, Yu Y, Kou C, et al. Survey (CMHS): I. background, aims and measures. Soc Psychiatry Psychiatr Epidemiol. 2016;51(11):1559\u0026ndash;69. The China Mental Health.\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eHuang Y-q. [Epidemiological study on mental disorder in China]. 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Sleep Breath. 2019;23(2):627\u0026ndash;34.\u003c/span\u003e\u003c/li\u003e \u003cli\u003e\u003cspan\u003eKopasz M, Loessl B, Hornyak M, Riemann D, Nissen C, Piosczyk H, Voderholzer U. Sleep and memory in healthy children and adolescents - a critical review. Sleep Med Rev. 2010;14(3):167\u0026ndash;77.\u003c/span\u003e\u003c/li\u003e\u003c/ol\u003e"}],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":true,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":false,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":false,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"bmc-public-health","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"pubh","sideBox":"Learn more about [BMC Public Health](http://bmcpublichealth.biomedcentral.com/)","snPcode":"","submissionUrl":"https://www.editorialmanager.com/pubh/default.aspx","title":"BMC Public Health","twitterHandle":"@BMC_series","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"em","reportingPortfolio":"BMC Series","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"Suboptimal heath status (SHS), Psychological symptoms (PS), Sleep time, Middle school students","lastPublishedDoi":"10.21203/rs.3.rs-4938654/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4938654/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003ch2\u003eBackground\u003c/h2\u003e \u003cp\u003eSuboptimal health status (SHS) is an intermediate status between ideal heath and illness, it is characterized by the perception of health complaints, general weakness, decreased immunity and low energy. More and more Chinese students have been troubled by psychological symptoms (PS). The relationship between SHS and PS is unclear in adolescents. This study aimed to investigate the prevalence of SHS and PS in Chinese adolescents and the relationship between SHS and PS and to identify the risk factors of SHS from the perspective of public health.\u003c/p\u003e\u003ch2\u003eMethods\u003c/h2\u003e \u003cp\u003eA cross-sectional study was conducted with the cluster sampling method among 1955 middle school students in Shantou, China. SHS was assessed by Suboptimal Health Status Questionnaire-25 (SHSQ-25). And the PS of anxiety and depression were assessed with Generalized Anxiety Disorder Scale (GAD-7) and Beck Depression Inventory-Ⅱ Scale (BDI-Ⅱ) self-assessment questionnaires. Variate logistic analysis was applied to explore risk factors of SHS. The relationship between SHS and PS among Chinese middle school students was subsequently analyzed.\u003c/p\u003e\u003ch2\u003eResults\u003c/h2\u003e \u003cp\u003eAmong the 1955 participants, 1904 middle school students were finally included in the analysis, the effective response rate was 97.39%. The prevalence of SHS was 10.3% (197/1904) while the prevalence of anxiety and depression was 30.7% (585/1904) and 34.1% (649/1904), respectively. A strong correlation was identified between SHS and PS among middle school students. With the aggravation of anxiety and depression, the probability of suffering from SHS increased (both \u003cem\u003eP\u003c/em\u003e\u0026lt;0.01). The scores for various dimensions of SHS among the depression and anxiety groups were higher compared to those of the non-depression and non-anxiety groups (all \u003cem\u003eP\u003c/em\u003e\u0026lt;0.01 ). Multivariate regression showed that compared with sleeping less than six hours, 6\u0026ndash;8 hours is a protective factor for SHS (\u003cem\u003eOR\u003c/em\u003e\u0026thinsp;=\u0026thinsp;0.486, 95%\u003cem\u003eCI\u003c/em\u003e\u0026thinsp;=\u0026thinsp;0.278\u0026ndash;0.851).\u003c/p\u003e\u003ch2\u003eConclusions\u003c/h2\u003e \u003cp\u003eAttention should be paid to the SHS and PS of Chinese middle school students and there is a strong association between SHS and PS among them. Lack of sleep is a risk factor for SHS so that sufficient sleeping time should be highly recommended as an advised measure to prevent SHS. Further discovering the risk factors of SHS and ensuring adequate sleep will benefit the health status of adolescents.\u003c/p\u003e","manuscriptTitle":"Suboptimal health among Chinese middle school students may be associated with psychological symptoms and sleep duration: A cross-sectional survey in China","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-09-17 11:30:45","doi":"10.21203/rs.3.rs-4938654/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2024-08-21T10:29:35+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2024-08-20T04:10:54+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2024-08-20T04:10:26+00:00","index":"","fulltext":""},{"type":"submitted","content":"BMC Public Health","date":"2024-08-19T12:31:05+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"bmc-public-health","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"pubh","sideBox":"Learn more about [BMC Public Health](http://bmcpublichealth.biomedcentral.com/)","snPcode":"","submissionUrl":"https://www.editorialmanager.com/pubh/default.aspx","title":"BMC Public Health","twitterHandle":"@BMC_series","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"em","reportingPortfolio":"BMC Series","inReviewEnabled":true,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"fbe7ec91-cbb7-4cbf-9d5d-bce6a7e091d6","owner":[],"postedDate":"September 17th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2024-11-18T15:59:01+00:00","versionOfRecord":{"articleIdentity":"rs-4938654","link":"https://doi.org/10.1186/s12889-024-20658-8","journal":{"identity":"bmc-public-health","isVorOnly":false,"title":"BMC Public Health"},"publishedOn":"2024-11-12 15:56:54","publishedOnDateReadable":"November 12th, 2024"},"versionCreatedAt":"2024-09-17 11:30:45","video":"","vorDoi":"10.1186/s12889-024-20658-8","vorDoiUrl":"https://doi.org/10.1186/s12889-024-20658-8","workflowStages":[]},"version":"v1","identity":"rs-4938654","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4938654","identity":"rs-4938654","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}