Objective. To examine temporal changes in the correlates of experimental and current e-cigarette use and associations with tobacco quit attempts. Method. Repeated cross-sectional analyses of data from the 2011 (n = 17,741), 2012 (n = 23,194), and 2013 (n = 16,858) National Youth Tobacco Surveys--a nationally representative sample of U.S. middle…

Adolescence is a common time for sexual initiation and information seeking about sexual health, yet little is known about how adolescents' sources of information about sex influence their sexual beliefs and behaviors. This is particularly true for Latino adolescents, whose sources of sex information and sexual behaviors are vastly understudied. A…

Purpose: Despite evidence that adolescents become addicted to nicotine even after limited use, adolescents believe they can experiment with or smoke cigarettes for a few years and easily quit. The goal of this study was to examine adolescents' understanding of the definition and process of nicotine addiction using a mixed-methods approach. Method:…

Aggressive and weapons carrying behaviors are indicative of youth violence. The theory of planned behavior is used in the current analysis to improve our understanding of violence-related behaviors. We examine the influence of perceived behavioral control (self-control and decision making) as a part of the overall framework for understanding the…

Introduction: Group-randomized trials (GRTs) are one of the most rigorous methods for evaluating the effectiveness of group-based health risk prevention programs. Efficiently designing GRTs with a sample size that is sufficient for meeting the trial's power and precision goals while not wasting resources exceeding them requires estimates of the…

Text messaging services are becoming an increasingly popular way to provide sexual health information to teens, but little is known about who uses such services. This study assessed whether teens at a greater risk for negative sexual health outcomes use a sexual health text message service. A text message service that connects teens with sexual…

Youth suicide is a serious public health issue in the United States. It is currently the third leading cause of death for youth aged 10 to 19. School-based prevention programs may be an effective method of educating youth and enhancing their help-seeking. Most school-based suicide prevention programs have not been rigorously evaluated for their…

The National Health Educator Competencies Update Project (CUP), conducted during 1998-2004, addressed what health educators currently do in practice, the degree to which the role definition of the entry-level health educator is still up-to-date, and the validation of advanced-level competencies. A 19-page questionnaire was sent to a representative…