Survey strategies into the national and you can county surveys were made to protect students’ confidentiality by allowing anonymous and you will volunteer involvement
Local adult consent steps was used just before survey management. Youngsters complete the new thinking-administered survey during one-class months and you will recorded their answers directly for the a pc-scannable booklet or address layer. Per survey incorporated next matter to find out frequency regarding previously with got sexual intercourse: “Have you got sexual intercourse?” Reaction choice were “yes” and “no.” Zero definition for sexual activity was considering.
On national YRBS, prevalence prices was basically calculated complete and also by levels (9th, tenth, 11th, otherwise twelfth), sex (male or female), and battle/ethnicity (non-Latina white [white], black colored, or Hispanic). Into state YRBSs, frequency estimates were determined because of the level. Mathematical application was utilized in order to account for this new complex sample activities during the analyses.
Logistic regression analyses were utilized to help you take into account most of the available rates; control to have changes in intercourse, levels, and you may race/ethnicity over the years; and assess statistically extreme (p