This study examined the test-retest reliability of the 2021 national YRBS questionnaire. Design: Respondents completed a Time 1 and Time 2 paper-and-pencil questionnaire approximately 2 weeks apart during February to May 2022. Data were linked in such a way as to preserve...
Results A total of 151 573 respondents were included in the analysis (51.1% male and 48.9% female; mean [SEM] age, 14.57 [0.03] years). Prevalence of e-cigarette use peaked in 2019 and then declined. Between 2014 and 2021, the age at initiation of e-cigarette use decreased, and intens...
(sCcIIy),bceyrbseecrsuercituyrpitoylriceiveise,wsus,cahnads“tsheocsuerepearntadincoinngtrtoollcarbitliec”alteincfhonrmoloatgiioens 中国的网络安全政策,如关键信息基础设施、网络安全审查和“安全可控”技术 71 48 40 35 28 With many expressing hopes that some form of regularized dialogue between...
Methods This study uses four time points of nationally representative data from the Youth Risk Behavior Survey (YRBS) from 2015 to 2021 to examine the differential associations of reporting having carried a firearm and suicide-related outcomes, after controlling for relevant demographic factors...