RT Journal Article SR Electronic T1 Comprehension of a simplified assent form in a vaccine trial for adolescents JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 410 OP 412 DO 10.1136/medethics-2012-101286 VO 39 IS 6 A1 Sonia Lee A1 Bill G Kapogiannis A1 Patricia M Flynn A1 Bret J Rudy A1 James Bethel A1 Sushma Ahmad A1 Diane Tucker A1 Sue Ellen Abdalian A1 Dannie Hoffman A1 Craig M Wilson A1 Coleen K Cunningham A1 Adolescent Medicine Trials Network for HIV/AIDS Interventions (ATN) YR 2013 UL http://jme.bmj.com/content/39/6/410.abstract AB Introduction Future HIV vaccine efficacy trials with adolescents will need to ensure that participants comprehend study concepts in order to confer true informed assent. A Hepatitis B vaccine trial with adolescents offers valuable opportunity to test youth understanding of vaccine trial requirements in general. Methods Youth reviewed a simplified assent form with study investigators and then completed a comprehension questionnaire. Once enrolled, all youth were tested for HIV and confirmed to be HIV-negative. Results 123 youth completed the questionnaire (mean age=15 years; 63% male; 70% Hispanic). Overall, only 69 (56%) youth answered all six questions correctly. Conclusions Youth enrolled in a Hepatitis B vaccine trial demonstrated variable comprehension of the study design and various methodological concepts, such as treatment group masking.