Percent of youth reporting unprotected vaginal sex in the past three months at three-month and six-month follow-up among adolescents in the CyberSenga intervention (n = 366).

aOR = adjusted odds ratio.Intervention, nb = Intervention, no booster.Intervetion +b = Intervention with booster.NC = Not calculated (no observations).Abstinent youth include youth who have never had sex, as well as those who have had sex, but not more recently than 2 years ago.*Reference group.Odds ratios adjusted for: youth age, history of a boyfriend or girlfriend, support from a special person, Attitudes towards HIV preventive acts, Subjective norms regarding HIV preventive acts, and Behavioral intentions for HIV prevention. Models for All Youth (except three-month follow-up per-protocol) also are adjusted for biological sex; analyses stratified by baseline sexual experience are not due to collinearity.