Influence of Lifestyle Patterns On Myopia In Students Aged 9 To 18 In Tianjin, China: A Latent Class Analysis

Purpose: This study aims to determine influence of lifestyle patterns on myopia and spherical equivalent refraction (SE) in school-aged children in Tianjin. Methods: : Students aged 9 to 18 in grade 4 to 12 were recruited. Non-cycloplegic SE was obtained. A self-administration questionnaire was used to collect demographic and lifestyle information. Results: : The overall prevalence of myopia of 8651 students was 81.5% and that of high myopia was 8.88%. Myopia and high myopia rate increased dramatically with grade (p<0.001). Students were classified into 3 groups based on latent class analysis (LCA). Students in class 2 had the lowest myopia rate of 74.1% and those in class 1 had the highest rate of 82.8%. Binary logistic regression analysis showed that class 1 and 3 had a higher risk for myopia compared to class 2 (OR= 1.68, p <0.001; OR= 1.46, p =0.004). The risk for high myopia of Class 1 and 3 were also higher compared to that of class2 (OR= 2.41, p <0.001; OR= 2.13, p =0.006). General linear model showed that SE of students in class 1 and 3 was lower than that of students in class 2 (β=-0.82, p <0.001; β=-0.68, p <0.001). Conclusion: Lifestyle is associated with myopia and SE value.