Dataset of a national survey on online gambling activities among young people in Portugal.

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These changes are reshaping gambling behaviors, attracting a growing number of enthusiasts. This paper describes a dataset that maps online gambling activities among young individuals in Portugal, providing insights into their gambling prevalence, habits, behaviors, preferences, and potential antecedents and consequences of these activities. Methods A survey was conducted with a representative sample of 1,993 young people in Portugal, aged between 18 and 34, to gather data on their activities. This methodology involved a quantitative telephone survey conducted in March and April 2023, utilizing quota sampling to ensure representation across various regions. The data collection process employed Computer Assisted Telephone Interviewing (CATI) and involved rigorous quality control measures to ensure accuracy and reliability. Conclusion The dataset generated from this survey provides valuable insights into the patterns of online gambling activities among young Portuguese individuals. It allows researchers to explore potential risk factors, including gambling-related harm, and to understand the sociodemographic factors influencing gambling behaviors. The findings can inform interventions and policies aimed at mitigating the negative consequences of online gambling among youth. " } { "@context": "http://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": "1", "item": { "@id": "https://f1000research.com/", "name": "Home" } }, { "@type": "ListItem", "position": "2", "item": { "@id": "https://f1000research.com/browse/articles", "name": "Browse" } }, { "@type": "ListItem", "position": "3", "item": { "@id": "https://f1000research.com/articles/13-893/v2", "name": "Dataset of a national survey on online gambling activities among young..." } } ] } Home Browse Dataset of a national survey on online gambling activities among young... ALL Metrics - Views Downloads Get PDF Get XML Cite How to cite this article Farias AR and Antunes AC. Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.12688/f1000research.152851.2 ) NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article. Close Copy Citation Details Export Export Citation Sciwheel EndNote Ref. Manager Bibtex ProCite Sente EXPORT Select a format first Track Share ▬ ✚ Data Note Revised Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] Ana Rita Farias https://orcid.org/0000-0002-7686-4046 1 , Ana Cristina Antunes https://orcid.org/0000-0001-8983-2062 2 Ana Rita Farias https://orcid.org/0000-0002-7686-4046 1 , Ana Cristina Antunes https://orcid.org/0000-0001-8983-2062 2 PUBLISHED 07 Mar 2025 Author details Author details 1 HEI‐Lab: Digital Human‐Environment Interaction Labs, Lusófona University, Lisbon, Lisbon, Portugal 2 School of Communication and Media Studies (ESCS), LIACOM, Polytechnic Institute of Lisbon, Lisbon, Lisbon, Portugal Ana Rita Farias Roles: Conceptualization, Data Curation, Formal Analysis, Funding Acquisition, Investigation, Methodology, Project Administration, Resources, Supervision, Validation, Writing – Original Draft Preparation, Writing – Review & Editing Ana Cristina Antunes Roles: Conceptualization, Data Curation, Formal Analysis, Funding Acquisition, Investigation, Methodology, Project Administration, Resources, Supervision, Validation, Writing – Original Draft Preparation, Writing – Review & Editing OPEN PEER REVIEW DETAILS REVIEWER STATUS This article is included in the Addiction and Related Behaviors gateway. Abstract Abstract Background Recent advancements in online gambling have significantly increased the popularity and participation in gambling activities among the general population, specifically the young generations. These changes are reshaping gambling behaviors, attracting a growing number of enthusiasts. This paper describes a dataset that maps online gambling activities among young individuals in Portugal, providing insights into their gambling prevalence, habits, behaviors, preferences, and potential antecedents and consequences of these activities. Methods A survey was conducted with a representative sample of 1,993 young people in Portugal, aged between 18 and 34, to gather data on their activities. This methodology involved a quantitative telephone survey conducted in March and April 2023, utilizing quota sampling to ensure representation across various regions. The data collection process employed Computer Assisted Telephone Interviewing (CATI) and involved rigorous quality control measures to ensure accuracy and reliability. Conclusion The dataset generated from this survey provides valuable insights into the patterns of online gambling activities among young Portuguese individuals. It allows researchers to explore potential risk factors, including gambling-related harm, and to understand the sociodemographic factors influencing gambling behaviors. The findings can inform interventions and policies aimed at mitigating the negative consequences of online gambling among youth. READ ALL READ LESS Keywords Online Gambling Behavior; Young Gamblers, Antecedents, Consequences, and Sociodemographic Factors Corresponding Author(s) Ana Rita Farias ( [email protected] ) Close Corresponding author: Ana Rita Farias Competing interests: No competing interests were disclosed. Grant information: This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UIDB/05380/2020 and by Fundação "laCaixa", Proposal number: FP22-1B034 Call: FP22_1B Realidad Social de los jóvenes en Portugal. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Copyright: © 2025 Farias AR and Antunes AC. This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. How to cite: Farias AR and Antunes AC. Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.12688/f1000research.152851.2 ) First published: 06 Aug 2024, 13 :893 ( https://doi.org/10.12688/f1000research.152851.1 ) Latest published: 07 Mar 2025, 13 :893 ( https://doi.org/10.12688/f1000research.152851.2 ) Revised Amendments from Version 1 The revised document improves methodological clarity by addressing data handling, sample division, and coding procedures. It refines explanations on managing non-response rates, enhances the rationale for sub-sample division, and clarifies the data coding process. Additional details on the pilot phase strengthen the study’s transparency. The revised document improves methodological clarity by addressing data handling, sample division, and coding procedures. It refines explanations on managing non-response rates, enhances the rationale for sub-sample division, and clarifies the data coding process. Additional details on the pilot phase strengthen the study’s transparency. See the authors' detailed response to the review by Tiange Xu READ REVIEWER RESPONSES Introduction The digital world has optimized numerous daily tasks, such as grocery shopping and communication. However, it has also introduced new problems or new forms of old problems. One industry significantly affected by digital transformation is gambling, and the online gambling market is growing worldwide, driven by technological advancements and increasing consumer confidence in online monetary transactions. According to Statista (2024), the revenue of the online gambling market is projected to reach US$100.90bn in 2024, with an annual growth rate (2024-2029) of 6.20%, resulting in a projected market volume of US$136.30bn by 2029, while the number of users is expected to reach 281.3 million by 2029. Notably, online gambling is currently the fastest-growing form of gambling. The easy access and convenience of online gambling, which can be done anywhere, at any time, and for an unlimited duration, coupled with the increasing availability of digital platforms, the low costs and incentives of online gambling, and the possible anonymity, has led to a rise in the number of people engaging in these forms of gambling for money. 1 These trends have raised concerns among various professionals, including educators and healthcare providers, who are increasingly worried about the potential negative effects of online gambling, such as financial problems and impacts on mental health. 2 , 3 Indeed, when compared with land-based gambling, online gambling has a greater addictive potential due to a series of situational and structural aspects, such as availability, accessibility, immediacy of reinforcement, or speed and frequency of gambling. 4 , 5 Additionally, it is associated with a range of negative outcomes that make it potentially harmful to individuals’ financial, physical, and emotional well-being, as well as to their families and society as a whole. 2 , 3 Moreover, despite clear age restrictions, literature suggests that the prevalence of online gambling activities is significantly higher among younger age groups compared to adults. 6 Understanding this issue among young people is crucial, as these new forms of online gambling seem particularly enticing to this population. To address the urgent need for understanding and mapping online gambling activities among Portuguese youth, this research aims to shed light on this phenomenon within this less-studied generational cohort. A telephone survey was conducted in March and April 2023, targeting a random sample of 1,993 young individuals aged 18 to 34, residing in Portugal. Methods This project, which intends to map online gambling activities and examine potential antecedents and outcomes among young individuals in Portugal, received data collection support from GfK. This quantitative study included both male and female participants, aged 18 to 34, living in Portugal. The sample consisted of 1,993 participants, divided into two sub-samples proportionately distributed across key regions in Portugal ( Table 1 ). Sub-sample 1 investigated the possible antecedents, while Sub-sample 2 examined the possible consequences. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality. Respondents were selected using the quota sampling method, incorporating variables such as gender, age (categorized into 2 groups), and region (using the Portuguese NUTS II regions). Quota sampling intends “to approximate the results that would be obtained with probabilistic samples” (Romero & Bologna, 2013, p. 288), 7 thus reproducing the characteristics of the study population. Households were chosen by randomly generating fixed and mobile telephone numbers, ensuring representation across the different Portuguese regions based on the initial matrix. The random generation of numbers followed assigned prefixes specific to each region and operator. Table 1. Sub-samples distribution among regions. Key-regions in Portugal Sub-sample 1 (SS1) Sub-sample 2 (SS2) North 357 356 Center 202 204 Lisbon 294 304 Alentejo 62 63 Algarve 41 45 Azores 25 25 Madeira 26 24 Total 1007 1021 The pilot study, conducted with six participants aged 18-34, aimed to assess survey question clarity, estimate interview duration to maintain engagement, identify technical issues with the Computer Assisted Telephone Interviewing (CATI) script, and evaluate the logical flow of questionnaire items. Based on participant feedback, minor wording adjustments were made to improve clarity, and the estimated duration was confirmed to be within an acceptable range, leading to the development of the final questionnaire. Data was collected through telephone interviews utilizing the CATI system, supported by a questionnaire developed by the research team. The fieldwork took place between January 28th and March 25th, 2023, with a team of 47 interviewers trained by GfK Metris. Interviews were conducted on weekdays from 5 PM to 10 PM and on weekends from 11 AM to 10 PM, covering a range of suitable time slots for data collection. Quality control Comprehensive quality control measures were implemented to ensure the accuracy and reliability of the data. Interviewers underwent thorough training, and we limited the inclusion of new interviewers to 25% of the total interviews. Additionally, interviews were distributed among different interviewers in each region to avoid concentration and potential bias. The CATI system enabled the automatic validation of the data file at multiple levels, including a response code validation for each question and ensuring a logical flow between questions, such as skips and filters, to maintain the questionnaire’s structure integrity. A field technician from Metris GfK supervised the interviewers, closely monitoring adherence to household and respondent selection criteria, overseeing interview conditions and duration, and providing on-site support when needed. Errors or missing information in the survey were reviewed by the IT Department, which determined appropriate procedures to rectify issues, such as contacting respondents for missing data or voiding interviews with abnormal non-response rates. An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire. Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high. Additionally, a separate supervision process involved recontacting at least 10% of each interviewer’s respondents to ensure data accuracy and consistency. Open-ended questions were transcribed using CATI software (e.g. https://www.b2binternational.com/research/methods/faq/what-is-cati/ ), converted into numeric data, capturing 100% of the responses. This facilitated the implementation of coding plans specific to each question, ensuring proper analysis and interpretation of qualitative data. Data coding of all variables was conducted using SPSS Statistics Version 28.0.1.0. After the coding process and comprehensive validation of the computer file, the data were ready for tabulation and further analysis using dedicated software. These measures ensured the overall quality and reliability of the collected data, enabling insightful findings on online gambling behaviors and meaningful conclusions on their predictors and consequences. Measures The questionnaire is structured in four sections: after an initial screening, there is a section intended to map gambling activities in general, followed by a focus on online gambling activities, habits, preferences and problem gambling, while the third section is designed to gather information on gambling antecedents and consequences and the final section obtains demographic information of the respondents. A) Initial screening : The initial screening measure aims to gain a preliminary understanding of participants’ gambling involvement and establish a baseline for further assessment. The key measure is Gambling Participation which determines whether the participant has ever engaged in any form of gambling (either online or offline). This essential question is posed with two response options: “1 - Yes” for those who gambled at least once during their lifetime and “2 - No” for those who have not. By identifying participants with prior gambling experience, researchers can segment the sample, which serves as a crucial step in understanding the dynamics of participation and involvement with gambling activities. B) Main measures across the two samples 1) Gambling activities map The following set of measures is designed to provide a comprehensive assessment of participants’ gambling experiences, habits, and spending patterns. • Gambling Experience Offline/Online Measure : Investigates whether participants have ever bet money on offline or online games using a dichotomous question (1 - Yes; 2 - No). • Gambling Frequency Offline/Online Measure : A single close-ended question tracks the frequency of participants’ gambling activities over their lifetime. It records the number of gambling occasions both online and offline, utilizing a frequency scale ranging from 1 (never) to 7 (41 or more occasions). • Gambling Participation Past 12 Months and Past 3 Months Offline/Online Measures : Adapted from Canale et al. (2016), 8 two close-ended questions gather information on the number of times participants engaged in online or offline gambling activities during the previous 12 months and the previous 3 months, respectively. Responses are recorded on a 5-point frequency scale, ranging from 1 (never) to 7 (41 or more occasions). • Gambling Frequency per Game Types in the Last 12 Months and Last 3 Months Measure : Based on Canale et al. (2016), 8 this measure assesses the frequency of participation in 11 different gambling activities, such as slot machines, Euromillions, bingo, instant lottery, sports betting, and poker. The gambling frequency on these different game types is measured using a 7-point frequency scale ranging from 1 (never) to 7 (41 or more occasions). • Gambling Average Monthly Expenditure Measure : Derived from Hubert (2015), 9 this close-ended question measures participants’ gambling expenditures in a typical month during the year preceding data collection. Participants are asked to indicate their monthly spending amount using a 6-point scale ranging from 1 (20€ or less) to 6 (100€ or more). • Gambling Spending Typical Month Measure : This open-ended question requires participants to specify the exact amount they spend in a typical month on both online and offline gambling activities. 2) Online Gambling Activities Map This set of measures is designed to explore various aspects of online gambling behavior and problematic gambling tendencies: • Start Browsing Age : assesses, by an open question, the age at which participants began browsing independently the internet. • Device Usage Frequency Measure: This measure assesses the frequency of device usage for online gambling, including personal computers, smartphones, and gaming consoles. Participants are asked to report how often they use for each device on a 5-point scale ranging from 1 (never) to 5 (always). • Gambling location frequency: This measure explores the frequency of online gambling in various locations, such as home, work, university/school, and outdoors. Participants are asked to indicate how often they gamble in each location using a 5-point scale ranging from 1 (never) to 5 (always). • Online Betting Time Preference: Assesses, through a single question, the preferred time of day for online betting. Participants are asked to select their preferred time from four options: morning, afternoon, night, and dawn. • Online Gambling Attraction Levels: An 11-item scale adapted from Hubert (2015) 9 assesses participants’ attraction to various aspects of online gambling, such as anonymity, convenience, diversity of games, and connection with others. Each item is rated on a 5-point scale, ranging from 1 (not at all attractive) to 5 (very attractive). Gambling-related Problem: Gambling problems were assessed using a version of the DSM-IV pathological gambling criteria (American Psychiatric Association, 2000), adapted from Canale et al. (2016). 8 Seven gambling-related problems (e.g., problems with spouse/partner and/or other people, financial problems, work-related problems) experienced in the previous 12 months are assessed. To go beyond the mere presence or absence of a symptom/problem, participants are asked to indicate the frequency that they experienced each symptom, using a 5-point frequency scale from 1 (Never) to 4 (Always). C) Specific measures s1 (Antecedents) and s2 (consequents) 1) Mapping antecedents (s1): This set of measures is designed to assess participants’ gambling antecedents comprehensively: • Gambling Motives measure : A 25-item measure adapted from Hubert (2019) 10 is used to assess peoples’ motives for gambling. Participants responded by indicating on a 7-point scale (1 being ‘does not apply to me at all’ and 7 ‘applies totally to me’), how much each motive could be applied to them. • Gambling Advertising measure : A 10-item scale adapted from Noble et al. (2022) 11 measures the perceived exposure to several types of gambling advertising and promotions. Participants are asked to indicate whether they had been aware of ads or promotions for gambling in several media (e.g., ‘Ads on TV’, ‘Ads on social media’, ‘Pop-ups on websites’, ‘Celebrities promoting gambling’) in the previous 30 days, using a 5-point frequency scale ranging from 1 (never) to 5 (always). 2) Mapping consequents (s2): This set of measures is designed to comprehensively assess the participants’ main gambling consequences: • Consequences for health and well-being : The Short Form Health Survey (SF-12) by Ware et al. (1996) 12 is used to assess overall health and well-being across eight domains, including physical functioning, role limitations due to physical and emotional problems, bodily pain, general health perceptions, vitality, social functioning, and mental health. It is widely used in clinical and research settings to provide a quick, reliable assessment of physical and mental health status. • Consequences Due to Gambling Measure : All 24 items of this scale adapted from Hubert (2015) 9 concern several consequences that can be derived from gambling (e.g., financial, for social and/or family life, on the professional sphere or for psychological and/or physical health). Participants are asked to rate the extent and severity of these various gambling-related consequences on a 6-point scale from 0 (not at all serious) to 5 (extremely serious). Items include “I couldn’t concentrate at work,” “At home, I was only physically present,” “It took up too much of my time,” and “I lost job or professional, social, or marital opportunities.” D) Socio-demographics: The socio-demographic measures collect essential personal and household information from respondents (incl. gender; age; years of formal education completed; parents’ education levels; marital status; employment status; average weekly and monthly disposable income; and household members). Dataset validation n/a Ethical considerations and consent to participate The study adhered to the Declaration of Helsinki and received approval from the Ethics Committee “Comissão De Ética E Deontologia Para A Investigação Científica (CEDIC)” of Lusófona University (Protocol code: CEDIC-2023-02-08; Approval Date: February 1, 2023). Before conducting the interviews, participants were informed about the general objective of the study and verbal consent was obtained. Verbal consent was deemed appropriate due to the data collection methodology, which involved telephone interviews. Data availability The data presented are openly available at OSF repository https://osf.io : National survey on online gambling activities among young people in Portugal. ( https://doi.org/ 10.17605/OSF.IO/JEK2T ) 13 Data are available under the terms of the Creative Commons Attribution 4.0 International license (CC B4.0). Acknowledgements n/a References 1. Tomei A, Petrovic G, Simon O: Offline and online gambling in a Swiss emerging-adult male population. J. Gambl. Stud. 2022; 38 (4): 1215–1228. PubMed Abstract | Publisher Full Text | Free Full Text 2. Wardle H, Degenhardt L, Ceschia A, et al. : The Lancet Public Health Commission on gambling. Lancet Public Health. 2021; 6 (1): e2–e3. PubMed Abstract | Publisher Full Text 3. Abarbanel B, Gainsbury SM, King D, et al. : Gambling games on social platforms: How do advertisements for social casino games target young adults? Policy Internet. 2017; 9 (2): 184–209. Publisher Full Text 4. Chóliz M: The challenge of online gambling: the effect of legalization on the increase in online gambling addiction. J. Gambl. Stud. 2016; 32 : 749–756. PubMed Abstract | Publisher Full Text 5. Montiel I, Ortega-Barón J, Basterra-González A, et al. : Problematic online gambling among adolescents: A systematic review about prevalence and related measurement issues. J. Behav. Addict. 2021; 10 (3): 566–586. PubMed Abstract | Publisher Full Text | Free Full Text 6. Abarbanel B, Johnson MR: Gambling engagement mechanisms in Twitch live streaming. Int. Gambl. Stud. 2020; 20 (3): 393–413. Publisher Full Text 7. Romero W, Bologna E: Técnicas de muestreo.Bologna E, editor. Estadística para psicología y educación. 2013; pp. 269–297. Editorial Brujas. 8. Canale N, Griffiths MD, Vieno A, et al. : Impact of Internet gambling on problem gambling among adolescents in Italy: Findings from a large-scale nationally representative survey. Comput. Hum. Behav. 2016; 57 : 99–106. Publisher Full Text 9. Hubert PF: Jogadores patológicos online e offline: caracterização e comparação (Doctoral thesis). Universidade Autónoma de Lisboa; 2015. Reference Source 10. Hubert P: Perturbação ou abuso de jogo? Navegação à vista nos limites do diagnóstico.Calado V, Org. Jogo, Internet e Outros Comportamentos Aditivos – dossier temático. 2019; pp. 71–87. SICAD, Ministério da Saúde – Portugal. Reference Source 11. Noble N, Freund M, Hill D, et al. : Exposure to gambling promotions and gambling behaviors in Australian secondary school students. Addict. Behav. Rep. 2022; 16 : 100439. PubMed Abstract | Publisher Full Text | Free Full Text 12. Ware J Jr, Kosinski M, Keller SD: A 12-Item Short-Form Health Survey: construction of scales and preliminary tests of reliability and validity. Med. Care. 1996; 34 (3): 220–233. Publisher Full Text 13. Farias AR, Antunes AC: National survey on online gambling activities among young people in Portugal.2024, June 6. Publisher Full Text Comments on this article Comments (0) Version 2 VERSION 2 PUBLISHED 06 Aug 2024 ADD YOUR COMMENT Comment Author details Author details 1 HEI‐Lab: Digital Human‐Environment Interaction Labs, Lusófona University, Lisbon, Lisbon, Portugal 2 School of Communication and Media Studies (ESCS), LIACOM, Polytechnic Institute of Lisbon, Lisbon, Lisbon, Portugal Ana Rita Farias Roles: Conceptualization, Data Curation, Formal Analysis, Funding Acquisition, Investigation, Methodology, Project Administration, Resources, Supervision, Validation, Writing – Original Draft Preparation, Writing – Review & Editing Ana Cristina Antunes Roles: Conceptualization, Data Curation, Formal Analysis, Funding Acquisition, Investigation, Methodology, Project Administration, Resources, Supervision, Validation, Writing – Original Draft Preparation, Writing – Review & Editing Competing interests No competing interests were disclosed. Grant information This work was supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UIDB/05380/2020 and by Fundação "laCaixa", Proposal number: FP22-1B034 Call: FP22_1B Realidad Social de los jóvenes en Portugal. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Article Versions (2) version 2 Revised Published: 07 Mar 2025, 13:893 https://doi.org/10.12688/f1000research.152851.2 version 1 Published: 06 Aug 2024, 13:893 https://doi.org/10.12688/f1000research.152851.1 Copyright © 2025 Farias AR and Antunes AC. This is an open access article distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Download Export To Sciwheel Bibtex EndNote ProCite Ref. Manager (RIS) Sente metrics Views Downloads F1000Research - - PubMed Central info_outline Data from PMC are received and updated monthly. - - Citations open_in_new 0 open_in_new 0 open_in_new SEE MORE DETAILS CITE how to cite this article Farias AR and Antunes AC. Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.12688/f1000research.152851.2 ) NOTE: If applicable, it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS track receive updates on this article Track an article to receive email alerts on any updates to this article. TRACK THIS ARTICLE Share Open Peer Review Current Reviewer Status: ? Key to Reviewer Statuses VIEW HIDE Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions Version 2 VERSION 2 PUBLISHED 07 Mar 2025 Revised Views 0 Cite How to cite this report: Grosemans E. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r397748 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-397748 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 22 Aug 2025 Eva Grosemans , Katholieke Universiteit Leuven, Leuven, Belgium Approved VIEWS 0 https://doi.org/10.5256/f1000research.178023.r397748 Thank you for this very useful dataset! I have a few, very small remarks. I think it would be useful to already add data on the gender split, as well as on the mean age and two ... Continue reading READ ALL Thank you for this very useful dataset! I have a few, very small remarks. I think it would be useful to already add data on the gender split, as well as on the mean age and two age groups (for the whole dataset and/or for the subsets). What was the average duration of the interviews? Did participants receive a definition and/or examples of gambling? I think it might be useful to add some examples of gambling motivations in the methods section. Is the rationale for creating the dataset(s) clearly described? Yes Are the protocols appropriate and is the work technically sound? Yes Are sufficient details of methods and materials provided to allow replication by others? Yes Are the datasets clearly presented in a useable and accessible format? Yes Competing Interests: No competing interests were disclosed. Reviewer Expertise: Gambling, young adults I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Grosemans E. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r397748 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-397748 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Respond or Comment COMMENT ON THIS REPORT Views 0 Cite How to cite this report: Pallesen S. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r394529 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-394529 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 14 Aug 2025 Ståle Pallesen , Department of Psychosocial Science, University of Bergen, Bergen, Hordaland, Norway; Haukeland University Hospital, Bergen, Norway Approved with Reservations VIEWS 0 https://doi.org/10.5256/f1000research.178023.r394529 This paper presents a dataset investigating online gambling behavior and various correlates among young people in Portugal as well as potential antecedents and consequences of such gambling. Abstract: I would like to see ... Continue reading READ ALL This paper presents a dataset investigating online gambling behavior and various correlates among young people in Portugal as well as potential antecedents and consequences of such gambling. Abstract: I would like to see some more results presented in the abstract (e.g., sample size broken down on the two subsets as well as overall response rate). Introduction: The introduction should maybe end with some clearly and explicitly formulated research questions – as of now it is just stated that there is “an urgent need to understand…” It is stated that the division into to samples (two sets of questionnaire) – was among other motivated by being able to investigate cause-effect relationship. However, as this study is based on a cross-sectional design cause-effect relationships (nor even directionality) cannot be elucidated based on such a design. To me it’s very unclear whether the sample is representative of the population or not. If quota sampling was used it means that the quotas reflect the population on some variables, however selection of persons into the quotas is normally based on convenience sampling. Please elaborate. If the phone numbers were randomly generated, how could only persons 18-34 years been reached? What happened if a call was directed to a household with more than one person 18-34 years of age? How was missing data handled statistically (e.g., imputation)? What was the response rate? This crucial information is currently lacking. I do acknowledge the usefulness of screening questions – however the authors run a risk of producing underreporting, as many of those who don’t endorse any type of gambling, could have endorsed if provided with a clue/priming (e.g., a list a potential gambling forms, such as lottery, poker with friends etc.). This may be mentioned as a limitation. The response alternatives on a 7-point scale, where the last alternative is “41 or more occasions” seems to reflect data on an ordinal scale. Please state if this is correct. In many instances the authors refer to scales they have adapted from other (such as Canale et al., 2016, Hubert, 2015, and Noble et al., 2022). The readers need to be informed exactly what the adaptions implies – otherwise the research is not replicable. I suggest that the authors make the whole questionnaire available in an appendix. Is the rationale for creating the dataset(s) clearly described? Partly Are the protocols appropriate and is the work technically sound? Partly Are sufficient details of methods and materials provided to allow replication by others? No Are the datasets clearly presented in a useable and accessible format? Partly Competing Interests: No competing interests were disclosed. Reviewer Expertise: Gambling/gaming and sleep I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Pallesen S. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r394529 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-394529 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Respond or Comment COMMENT ON THIS REPORT Views 0 Cite How to cite this report: Xu T. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r369955 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-369955 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 19 Mar 2025 Tiange Xu , University of Nevada, Las Vegas, NV, USA Approved VIEWS 0 https://doi.org/10.5256/f1000research.178023.r369955 No further comments to ... Continue reading READ ALL No further comments to make on this revised article. Competing Interests: No competing interests were disclosed. Reviewer Expertise: Problem gambling I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Xu T. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r369955 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-369955 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Respond or Comment COMMENT ON THIS REPORT Version 1 VERSION 1 PUBLISHED 06 Aug 2024 Views 0 Cite How to cite this report: Xu T. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.167658.r332353 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v1#referee-response-332353 NOTE: it is important to ensure the information in square brackets after the title is included in this citation. Close Copy Citation Details Reviewer Report 31 Oct 2024 Tiange Xu , University of Nevada, Las Vegas, NV, USA Approved with Reservations VIEWS 0 https://doi.org/10.5256/f1000research.167658.r332353 This manuscript describes a dataset on online gambling behaviors among Portuguese youth (18-34 years old), collected through telephone surveys with 1,993 participants. The study aims to understand gambling prevalence, habits, behaviors, and their antecedents/consequences. The data was ... Continue reading READ ALL This manuscript describes a dataset on online gambling behaviors among Portuguese youth (18-34 years old), collected through telephone surveys with 1,993 participants. The study aims to understand gambling prevalence, habits, behaviors, and their antecedents/consequences. The data was collected using CATI methodology with robust quality control measures. Rationale for dataset creation: The authors clearly establish the importance of studying online gambling among youth, citing relevant statistics and highlighting the growing concerns around this issue. Protocols and Technical Soundness: While the overall methodology is sound, I have a few concerns: 1) Could you clarify how you handled non-response rates? What was considered an "abnormal" non-response rate? 2) The split into two sub-samples needs more explanation—what was the rationale behind this division? Methods and Materials for Replication: I appreciate the detailed description of the survey methodology, but a few elements are missing: 1) The coding plans mentioned for open-ended questions should be described; 2) Could you specify the software used for data analysis? 3) Please provide more details about the pilot phase—like, how many participants were involved, and what specific changes were made based on the pilot? Is the rationale for creating the dataset(s) clearly described? Yes Are the protocols appropriate and is the work technically sound? Partly Are sufficient details of methods and materials provided to allow replication by others? Partly Are the datasets clearly presented in a useable and accessible format? Yes Competing Interests: No competing interests were disclosed. Reviewer Expertise: Problem gambling I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. Close READ LESS CITE CITE HOW TO CITE THIS REPORT Xu T. Reviewer Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.167658.r332353 ) The direct URL for this report is: https://f1000research.com/articles/13-893/v1#referee-response-332353 NOTE: it is important to ensure the information in square brackets after the title is included in all citations of this article. COPY CITATION DETAILS Report a concern Author Response 07 Mar 2025 Ana Rita Farias , HEI‐Lab: Digital Human‐Environment Interaction Labs, Lusófona University, Lisbon, Portugal 07 Mar 2025 Author Response Dear Reviewer, We sincerely appreciate the time and effort you have taken to review our manuscript. Your insightful comments have helped us refine our work, and we have carefully ... Continue reading Dear Reviewer, We sincerely appreciate the time and effort you have taken to review our manuscript. Your insightful comments have helped us refine our work, and we have carefully addressed each of your concerns. Below, we provide detailed responses to your queries and describe the corresponding revisions made to our manuscript. 1. Handling of Non-Response Rates Reviewer’s Comment: Could you clarify how you handled non-response rates? Response: The data collection and handling of non-responses were managed by GfK Metris Portugal. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high. We have clarified this in the revised manuscript by integrating the following text to addressed this concern: “Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high.” 2. Definition of Abnormal Non-Response Rate Reviewer’s Comment: What was considered an "abnormal" non-response rate? Response: An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire. Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. This information has been explicitly stated in the revised manuscript. “An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire.” 3. Rationale for Sub-Sample Division Reviewer’s Comment: The split into two sub-samples needs more explanation—what was the rationale behind this division? Response: The dataset was divided into two sub-samples to allow a more focused exploration of antecedents and consequences of gambling behaviors: a) Sub-sample 1 (SS1): Investigated potential antecedents of gambling behavior, such as exposure to gambling advertisements, motives for gambling, and early experiences. b) Sub-sample 2 (SS2): Focused on gambling consequences, such as financial difficulties, social and psychological effects, and health impacts. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality. This explanation has now been included in the revised manuscript as follows. “The sample consisted of 1,993 participants, divided into two sub-samples proportionately distributed across key regions in Portugal ( Table 1). Sub-sample 1 investigated the possible antecedents, while Sub-sample 2 examined the possible consequences. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality.” 4. Description of Coding Plans for Open-Ended Questions Reviewer’s Comment: The coding plans mentioned for open-ended questions should be described. Response: We have clarified that all open-ended questions were converted into numeric data. A brief description of the coding process has been added to the revised manuscript. “ Open-ended questions were transcribed using CATI software (e.g. https://www.b2binternational.com/research/methods/faq/what-is-cati/ ), converted into numeric data, capturing 100% of the responses. ” 5. Specification of Software Used for Data Analysis Reviewer’s Comment: Could you specify the software used for data analysis? Response: Data coding of all variables was conducted using SPSS Statistics Version 28.0.1.0. This information has been explicitly stated in the revised manuscript. 6. Details on the Pilot Phase Reviewer’s Comment: Please provide more details about the pilot phase—like how many participants were involved, and what specific changes were made based on the pilot? Response: The pilot study involved 6 participants from the target demographic (18-34 years old). The objectives of the pilot were: Assessing the clarity and comprehensibility of survey questions. Estimating the expected duration of interviews to ensure participant engagement and minimize survey fatigue. Identifying any technical issues with the CATI system. Testing the logical flow of questionnaire items. Based on feedback from the pilot study, minor wording adjustments were made to improve question clarity, and the estimated duration was confirmed to be within an acceptable range. These details have been added to the revised manuscript. “The pilot study, conducted with six participants aged 18-34, aimed to assess survey question clarity, estimate interview duration to maintain engagement, identify technical issues with the Computer Assisted Telephone Interviewing (CATI) script, and evaluate the logical flow of questionnaire items. Based on participant feedback, minor wording adjustments were made to improve clarity, and the estimated duration was confirmed to be within an acceptable range, leading to the development of the final questionnaire.” We are grateful for your valuable feedback, which has helped us strengthen our manuscript. We believe that the revisions enhance the clarity and rigor of our study. Thank you for your thoughtful review. Dear Reviewer, We sincerely appreciate the time and effort you have taken to review our manuscript. Your insightful comments have helped us refine our work, and we have carefully addressed each of your concerns. Below, we provide detailed responses to your queries and describe the corresponding revisions made to our manuscript. 1. Handling of Non-Response Rates Reviewer’s Comment: Could you clarify how you handled non-response rates? Response: The data collection and handling of non-responses were managed by GfK Metris Portugal. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high. We have clarified this in the revised manuscript by integrating the following text to addressed this concern: “Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high.” 2. Definition of Abnormal Non-Response Rate Reviewer’s Comment: What was considered an "abnormal" non-response rate? Response: An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire. Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. This information has been explicitly stated in the revised manuscript. “An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire.” 3. Rationale for Sub-Sample Division Reviewer’s Comment: The split into two sub-samples needs more explanation—what was the rationale behind this division? Response: The dataset was divided into two sub-samples to allow a more focused exploration of antecedents and consequences of gambling behaviors: a) Sub-sample 1 (SS1): Investigated potential antecedents of gambling behavior, such as exposure to gambling advertisements, motives for gambling, and early experiences. b) Sub-sample 2 (SS2): Focused on gambling consequences, such as financial difficulties, social and psychological effects, and health impacts. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality. This explanation has now been included in the revised manuscript as follows. “The sample consisted of 1,993 participants, divided into two sub-samples proportionately distributed across key regions in Portugal ( Table 1). Sub-sample 1 investigated the possible antecedents, while Sub-sample 2 examined the possible consequences. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality.” 4. Description of Coding Plans for Open-Ended Questions Reviewer’s Comment: The coding plans mentioned for open-ended questions should be described. Response: We have clarified that all open-ended questions were converted into numeric data. A brief description of the coding process has been added to the revised manuscript. “ Open-ended questions were transcribed using CATI software (e.g. https://www.b2binternational.com/research/methods/faq/what-is-cati/ ), converted into numeric data, capturing 100% of the responses. ” 5. Specification of Software Used for Data Analysis Reviewer’s Comment: Could you specify the software used for data analysis? Response: Data coding of all variables was conducted using SPSS Statistics Version 28.0.1.0. This information has been explicitly stated in the revised manuscript. 6. Details on the Pilot Phase Reviewer’s Comment: Please provide more details about the pilot phase—like how many participants were involved, and what specific changes were made based on the pilot? Response: The pilot study involved 6 participants from the target demographic (18-34 years old). The objectives of the pilot were: Assessing the clarity and comprehensibility of survey questions. Estimating the expected duration of interviews to ensure participant engagement and minimize survey fatigue. Identifying any technical issues with the CATI system. Testing the logical flow of questionnaire items. Based on feedback from the pilot study, minor wording adjustments were made to improve question clarity, and the estimated duration was confirmed to be within an acceptable range. These details have been added to the revised manuscript. “The pilot study, conducted with six participants aged 18-34, aimed to assess survey question clarity, estimate interview duration to maintain engagement, identify technical issues with the Computer Assisted Telephone Interviewing (CATI) script, and evaluate the logical flow of questionnaire items. Based on participant feedback, minor wording adjustments were made to improve clarity, and the estimated duration was confirmed to be within an acceptable range, leading to the development of the final questionnaire.” We are grateful for your valuable feedback, which has helped us strengthen our manuscript. We believe that the revisions enhance the clarity and rigor of our study. Thank you for your thoughtful review. Competing Interests: No competing interests were disclosed. Close Report a concern Respond or Comment COMMENTS ON THIS REPORT Author Response 07 Mar 2025 Ana Rita Farias , HEI‐Lab: Digital Human‐Environment Interaction Labs, Lusófona University, Lisbon, Portugal 07 Mar 2025 Author Response Dear Reviewer, We sincerely appreciate the time and effort you have taken to review our manuscript. Your insightful comments have helped us refine our work, and we have carefully ... Continue reading Dear Reviewer, We sincerely appreciate the time and effort you have taken to review our manuscript. Your insightful comments have helped us refine our work, and we have carefully addressed each of your concerns. Below, we provide detailed responses to your queries and describe the corresponding revisions made to our manuscript. 1. Handling of Non-Response Rates Reviewer’s Comment: Could you clarify how you handled non-response rates? Response: The data collection and handling of non-responses were managed by GfK Metris Portugal. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high. We have clarified this in the revised manuscript by integrating the following text to addressed this concern: “Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high.” 2. Definition of Abnormal Non-Response Rate Reviewer’s Comment: What was considered an "abnormal" non-response rate? Response: An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire. Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. This information has been explicitly stated in the revised manuscript. “An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire.” 3. Rationale for Sub-Sample Division Reviewer’s Comment: The split into two sub-samples needs more explanation—what was the rationale behind this division? Response: The dataset was divided into two sub-samples to allow a more focused exploration of antecedents and consequences of gambling behaviors: a) Sub-sample 1 (SS1): Investigated potential antecedents of gambling behavior, such as exposure to gambling advertisements, motives for gambling, and early experiences. b) Sub-sample 2 (SS2): Focused on gambling consequences, such as financial difficulties, social and psychological effects, and health impacts. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality. This explanation has now been included in the revised manuscript as follows. “The sample consisted of 1,993 participants, divided into two sub-samples proportionately distributed across key regions in Portugal ( Table 1). Sub-sample 1 investigated the possible antecedents, while Sub-sample 2 examined the possible consequences. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality.” 4. Description of Coding Plans for Open-Ended Questions Reviewer’s Comment: The coding plans mentioned for open-ended questions should be described. Response: We have clarified that all open-ended questions were converted into numeric data. A brief description of the coding process has been added to the revised manuscript. “ Open-ended questions were transcribed using CATI software (e.g. https://www.b2binternational.com/research/methods/faq/what-is-cati/ ), converted into numeric data, capturing 100% of the responses. ” 5. Specification of Software Used for Data Analysis Reviewer’s Comment: Could you specify the software used for data analysis? Response: Data coding of all variables was conducted using SPSS Statistics Version 28.0.1.0. This information has been explicitly stated in the revised manuscript. 6. Details on the Pilot Phase Reviewer’s Comment: Please provide more details about the pilot phase—like how many participants were involved, and what specific changes were made based on the pilot? Response: The pilot study involved 6 participants from the target demographic (18-34 years old). The objectives of the pilot were: Assessing the clarity and comprehensibility of survey questions. Estimating the expected duration of interviews to ensure participant engagement and minimize survey fatigue. Identifying any technical issues with the CATI system. Testing the logical flow of questionnaire items. Based on feedback from the pilot study, minor wording adjustments were made to improve question clarity, and the estimated duration was confirmed to be within an acceptable range. These details have been added to the revised manuscript. “The pilot study, conducted with six participants aged 18-34, aimed to assess survey question clarity, estimate interview duration to maintain engagement, identify technical issues with the Computer Assisted Telephone Interviewing (CATI) script, and evaluate the logical flow of questionnaire items. Based on participant feedback, minor wording adjustments were made to improve clarity, and the estimated duration was confirmed to be within an acceptable range, leading to the development of the final questionnaire.” We are grateful for your valuable feedback, which has helped us strengthen our manuscript. We believe that the revisions enhance the clarity and rigor of our study. Thank you for your thoughtful review. Dear Reviewer, We sincerely appreciate the time and effort you have taken to review our manuscript. Your insightful comments have helped us refine our work, and we have carefully addressed each of your concerns. Below, we provide detailed responses to your queries and describe the corresponding revisions made to our manuscript. 1. Handling of Non-Response Rates Reviewer’s Comment: Could you clarify how you handled non-response rates? Response: The data collection and handling of non-responses were managed by GfK Metris Portugal. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high. We have clarified this in the revised manuscript by integrating the following text to addressed this concern: “Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high.” 2. Definition of Abnormal Non-Response Rate Reviewer’s Comment: What was considered an "abnormal" non-response rate? Response: An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire. Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. This information has been explicitly stated in the revised manuscript. “An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire.” 3. Rationale for Sub-Sample Division Reviewer’s Comment: The split into two sub-samples needs more explanation—what was the rationale behind this division? Response: The dataset was divided into two sub-samples to allow a more focused exploration of antecedents and consequences of gambling behaviors: a) Sub-sample 1 (SS1): Investigated potential antecedents of gambling behavior, such as exposure to gambling advertisements, motives for gambling, and early experiences. b) Sub-sample 2 (SS2): Focused on gambling consequences, such as financial difficulties, social and psychological effects, and health impacts. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality. This explanation has now been included in the revised manuscript as follows. “The sample consisted of 1,993 participants, divided into two sub-samples proportionately distributed across key regions in Portugal ( Table 1). Sub-sample 1 investigated the possible antecedents, while Sub-sample 2 examined the possible consequences. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality.” 4. Description of Coding Plans for Open-Ended Questions Reviewer’s Comment: The coding plans mentioned for open-ended questions should be described. Response: We have clarified that all open-ended questions were converted into numeric data. A brief description of the coding process has been added to the revised manuscript. “ Open-ended questions were transcribed using CATI software (e.g. https://www.b2binternational.com/research/methods/faq/what-is-cati/ ), converted into numeric data, capturing 100% of the responses. ” 5. Specification of Software Used for Data Analysis Reviewer’s Comment: Could you specify the software used for data analysis? Response: Data coding of all variables was conducted using SPSS Statistics Version 28.0.1.0. This information has been explicitly stated in the revised manuscript. 6. Details on the Pilot Phase Reviewer’s Comment: Please provide more details about the pilot phase—like how many participants were involved, and what specific changes were made based on the pilot? Response: The pilot study involved 6 participants from the target demographic (18-34 years old). The objectives of the pilot were: Assessing the clarity and comprehensibility of survey questions. Estimating the expected duration of interviews to ensure participant engagement and minimize survey fatigue. Identifying any technical issues with the CATI system. Testing the logical flow of questionnaire items. Based on feedback from the pilot study, minor wording adjustments were made to improve question clarity, and the estimated duration was confirmed to be within an acceptable range. These details have been added to the revised manuscript. “The pilot study, conducted with six participants aged 18-34, aimed to assess survey question clarity, estimate interview duration to maintain engagement, identify technical issues with the Computer Assisted Telephone Interviewing (CATI) script, and evaluate the logical flow of questionnaire items. Based on participant feedback, minor wording adjustments were made to improve clarity, and the estimated duration was confirmed to be within an acceptable range, leading to the development of the final questionnaire.” We are grateful for your valuable feedback, which has helped us strengthen our manuscript. We believe that the revisions enhance the clarity and rigor of our study. Thank you for your thoughtful review. Competing Interests: No competing interests were disclosed. Close Report a concern COMMENT ON THIS REPORT Comments on this article Comments (0) Version 2 VERSION 2 PUBLISHED 06 Aug 2024 ADD YOUR COMMENT Comment keyboard_arrow_left keyboard_arrow_right Open Peer Review Reviewer Status info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions Reviewer Reports Invited Reviewers 1 2 3 Version 2 (revision) 07 Mar 25 read read read Version 1 06 Aug 24 read Tiange Xu , University of Nevada, Las Vegas, USA Ståle Pallesen , University of Bergen, Bergen, Norway; Haukeland University Hospital, Bergen, Norway Eva Grosemans , Katholieke Universiteit Leuven, Leuven, Belgium Comments on this article All Comments (0) Add a comment Sign up for content alerts Sign Up You are now signed up to receive this alert Browse by related subjects keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2025 Grosemans E. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 22 Aug 2025 | for Version 2 Eva Grosemans , Katholieke Universiteit Leuven, Leuven, Belgium 0 Views copyright © 2025 Grosemans E. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (0) Approved info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions Thank you for this very useful dataset! I have a few, very small remarks. I think it would be useful to already add data on the gender split, as well as on the mean age and two age groups (for the whole dataset and/or for the subsets). What was the average duration of the interviews? Did participants receive a definition and/or examples of gambling? I think it might be useful to add some examples of gambling motivations in the methods section. Is the rationale for creating the dataset(s) clearly described? Yes Are the protocols appropriate and is the work technically sound? Yes Are sufficient details of methods and materials provided to allow replication by others? Yes Are the datasets clearly presented in a useable and accessible format? Yes Competing Interests No competing interests were disclosed. Reviewer Expertise Gambling, young adults I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. reply Respond to this report Responses (0) Grosemans E. Peer Review Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r397748) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-397748 keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2025 Pallesen S. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 14 Aug 2025 | for Version 2 Ståle Pallesen , Department of Psychosocial Science, University of Bergen, Bergen, Hordaland, Norway; Haukeland University Hospital, Bergen, Norway 0 Views copyright © 2025 Pallesen S. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (0) Approved With Reservations info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions This paper presents a dataset investigating online gambling behavior and various correlates among young people in Portugal as well as potential antecedents and consequences of such gambling. Abstract: I would like to see some more results presented in the abstract (e.g., sample size broken down on the two subsets as well as overall response rate). Introduction: The introduction should maybe end with some clearly and explicitly formulated research questions – as of now it is just stated that there is “an urgent need to understand…” It is stated that the division into to samples (two sets of questionnaire) – was among other motivated by being able to investigate cause-effect relationship. However, as this study is based on a cross-sectional design cause-effect relationships (nor even directionality) cannot be elucidated based on such a design. To me it’s very unclear whether the sample is representative of the population or not. If quota sampling was used it means that the quotas reflect the population on some variables, however selection of persons into the quotas is normally based on convenience sampling. Please elaborate. If the phone numbers were randomly generated, how could only persons 18-34 years been reached? What happened if a call was directed to a household with more than one person 18-34 years of age? How was missing data handled statistically (e.g., imputation)? What was the response rate? This crucial information is currently lacking. I do acknowledge the usefulness of screening questions – however the authors run a risk of producing underreporting, as many of those who don’t endorse any type of gambling, could have endorsed if provided with a clue/priming (e.g., a list a potential gambling forms, such as lottery, poker with friends etc.). This may be mentioned as a limitation. The response alternatives on a 7-point scale, where the last alternative is “41 or more occasions” seems to reflect data on an ordinal scale. Please state if this is correct. In many instances the authors refer to scales they have adapted from other (such as Canale et al., 2016, Hubert, 2015, and Noble et al., 2022). The readers need to be informed exactly what the adaptions implies – otherwise the research is not replicable. I suggest that the authors make the whole questionnaire available in an appendix. Is the rationale for creating the dataset(s) clearly described? Partly Are the protocols appropriate and is the work technically sound? Partly Are sufficient details of methods and materials provided to allow replication by others? No Are the datasets clearly presented in a useable and accessible format? Partly Competing Interests No competing interests were disclosed. Reviewer Expertise Gambling/gaming and sleep I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. reply Respond to this report Responses (0) Pallesen S. Peer Review Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r394529) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-394529 keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2025 Xu T. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 19 Mar 2025 | for Version 2 Tiange Xu , University of Nevada, Las Vegas, NV, USA 0 Views copyright © 2025 Xu T. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (0) Approved info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions No further comments to make on this revised article. Competing Interests No competing interests were disclosed. Reviewer Expertise Problem gambling I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard. reply Respond to this report Responses (0) Xu T. Peer Review Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.178023.r369955) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/13-893/v2#referee-response-369955 keyboard_arrow_left Back to all reports Reviewer Report 0 Views copyright © 2024 Xu T. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 31 Oct 2024 | for Version 1 Tiange Xu , University of Nevada, Las Vegas, NV, USA 0 Views copyright © 2024 Xu T. This is an open access peer review report distributed under the terms of the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. format_quote Cite this report speaker_notes Responses (1) Approved With Reservations info_outline Alongside their report, reviewers assign a status to the article: Approved The paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved Fundamental flaws in the paper seriously undermine the findings and conclusions This manuscript describes a dataset on online gambling behaviors among Portuguese youth (18-34 years old), collected through telephone surveys with 1,993 participants. The study aims to understand gambling prevalence, habits, behaviors, and their antecedents/consequences. The data was collected using CATI methodology with robust quality control measures. Rationale for dataset creation: The authors clearly establish the importance of studying online gambling among youth, citing relevant statistics and highlighting the growing concerns around this issue. Protocols and Technical Soundness: While the overall methodology is sound, I have a few concerns: 1) Could you clarify how you handled non-response rates? What was considered an "abnormal" non-response rate? 2) The split into two sub-samples needs more explanation—what was the rationale behind this division? Methods and Materials for Replication: I appreciate the detailed description of the survey methodology, but a few elements are missing: 1) The coding plans mentioned for open-ended questions should be described; 2) Could you specify the software used for data analysis? 3) Please provide more details about the pilot phase—like, how many participants were involved, and what specific changes were made based on the pilot? Is the rationale for creating the dataset(s) clearly described? Yes Are the protocols appropriate and is the work technically sound? Partly Are sufficient details of methods and materials provided to allow replication by others? Partly Are the datasets clearly presented in a useable and accessible format? Yes Competing Interests No competing interests were disclosed. Reviewer Expertise Problem gambling I confirm that I have read this submission and believe that I have an appropriate level of expertise to confirm that it is of an acceptable scientific standard, however I have significant reservations, as outlined above. reply Respond to this report Responses (1) Author Response 07 Mar 2025 Ana Rita Farias, HEI‐Lab: Digital Human‐Environment Interaction Labs, Lusófona University, Lisbon, Portugal Dear Reviewer, We sincerely appreciate the time and effort you have taken to review our manuscript. Your insightful comments have helped us refine our work, and we have carefully addressed each of your concerns. Below, we provide detailed responses to your queries and describe the corresponding revisions made to our manuscript. 1. Handling of Non-Response Rates Reviewer’s Comment: Could you clarify how you handled non-response rates? Response: The data collection and handling of non-responses were managed by GfK Metris Portugal. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high. We have clarified this in the revised manuscript by integrating the following text to addressed this concern: “Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. The company systematically reviewed all questionnaires to identify errors or missing information. Each case was assessed individually, with possible actions ranging from re-contacting participants to retrieve missing data to canceling interviews altogether if the non-response rate was deemed excessively high.” 2. Definition of Abnormal Non-Response Rate Reviewer’s Comment: What was considered an "abnormal" non-response rate? Response: An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire. Cases in which the extent of missing data compromised the validity or interpretability of the responses were classified as exhibiting an excessively high non-response rate, warranting the exclusion of the interview from the final dataset. This information has been explicitly stated in the revised manuscript. “An abnormal non-response rate was determined based on a comparative assessment of the proportion of unanswered questions relative to the total number of items in the questionnaire.” 3. Rationale for Sub-Sample Division Reviewer’s Comment: The split into two sub-samples needs more explanation—what was the rationale behind this division? Response: The dataset was divided into two sub-samples to allow a more focused exploration of antecedents and consequences of gambling behaviors: a) Sub-sample 1 (SS1): Investigated potential antecedents of gambling behavior, such as exposure to gambling advertisements, motives for gambling, and early experiences. b) Sub-sample 2 (SS2): Focused on gambling consequences, such as financial difficulties, social and psychological effects, and health impacts. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality. This explanation has now been included in the revised manuscript as follows. “The sample consisted of 1,993 participants, divided into two sub-samples proportionately distributed across key regions in Portugal ( Table 1). Sub-sample 1 investigated the possible antecedents, while Sub-sample 2 examined the possible consequences. This division enabled a more detailed analysis of cause-effect relationships without overloading individual respondents with an excessively long questionnaire, reducing survey fatigue and increasing response quality.” 4. Description of Coding Plans for Open-Ended Questions Reviewer’s Comment: The coding plans mentioned for open-ended questions should be described. Response: We have clarified that all open-ended questions were converted into numeric data. A brief description of the coding process has been added to the revised manuscript. “ Open-ended questions were transcribed using CATI software (e.g. https://www.b2binternational.com/research/methods/faq/what-is-cati/ ), converted into numeric data, capturing 100% of the responses. ” 5. Specification of Software Used for Data Analysis Reviewer’s Comment: Could you specify the software used for data analysis? Response: Data coding of all variables was conducted using SPSS Statistics Version 28.0.1.0. This information has been explicitly stated in the revised manuscript. 6. Details on the Pilot Phase Reviewer’s Comment: Please provide more details about the pilot phase—like how many participants were involved, and what specific changes were made based on the pilot? Response: The pilot study involved 6 participants from the target demographic (18-34 years old). The objectives of the pilot were: Assessing the clarity and comprehensibility of survey questions. Estimating the expected duration of interviews to ensure participant engagement and minimize survey fatigue. Identifying any technical issues with the CATI system. Testing the logical flow of questionnaire items. Based on feedback from the pilot study, minor wording adjustments were made to improve question clarity, and the estimated duration was confirmed to be within an acceptable range. These details have been added to the revised manuscript. “The pilot study, conducted with six participants aged 18-34, aimed to assess survey question clarity, estimate interview duration to maintain engagement, identify technical issues with the Computer Assisted Telephone Interviewing (CATI) script, and evaluate the logical flow of questionnaire items. Based on participant feedback, minor wording adjustments were made to improve clarity, and the estimated duration was confirmed to be within an acceptable range, leading to the development of the final questionnaire.” We are grateful for your valuable feedback, which has helped us strengthen our manuscript. We believe that the revisions enhance the clarity and rigor of our study. Thank you for your thoughtful review. View more View less Competing Interests No competing interests were disclosed. reply Respond Report a concern Xu T. Peer Review Report For: Dataset of a national survey on online gambling activities among young people in Portugal. [version 2; peer review: 2 approved, 1 approved with reservations] . F1000Research 2025, 13 :893 ( https://doi.org/10.5256/f1000research.167658.r332353) NOTE: it is important to ensure the information in square brackets after the title is included in this citation. The direct URL for this report is: https://f1000research.com/articles/13-893/v1#referee-response-332353 Alongside their report, reviewers assign a status to the article: Approved - the paper is scientifically sound in its current form and only minor, if any, improvements are suggested Approved with reservations - A number of small changes, sometimes more significant revisions are required to address specific details and improve the papers academic merit. Not approved - fundamental flaws in the paper seriously undermine the findings and conclusions Adjust parameters to alter display View on desktop for interactive features Includes Interactive Elements View on desktop for interactive features Competing Interests Policy Provide sufficient details of any financial or non-financial competing interests to enable users to assess whether your comments might lead a reasonable person to question your impartiality. Consider the following examples, but note that this is not an exhaustive list: Examples of 'Non-Financial Competing Interests' Within the past 4 years, you have held joint grants, published or collaborated with any of the authors of the selected paper. You have a close personal relationship (e.g. parent, spouse, sibling, or domestic partner) with any of the authors. You are a close professional associate of any of the authors (e.g. scientific mentor, recent student). You work at the same institute as any of the authors. 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