The purpose of this study was to provide estimates of the prevalence of premarital intercourse, use and nonuse of contraception, pregnancy, and pregnancy resolution among teenagers. The study also att
1UIA = unprotected insertive anal intercourse; URA = unprotected receptive anal intercourse; SDUIA: UIA with serodiscordant or unknown status partners; SDURA: URA with serodiscordant or unknown status
(a)OR = Adjusted Odds Ratio (matched by age and admission time).Final conditional logistic regression model: HIV risk factors among MSM, Project Horizonte, 1994–2010.
