Condom Use at First Vaginal Intercourse Among Adolescents and Young Adults in the United States, 2002–2017

Purpose The purpose of this study was to describe trends in vaginal intercourse (VI) and condom use during first VI from 2002 to 2017 among never-married 15- to 24-year-olds in the United States. Methods Data come from the National Survey of Family Growth. We used logistic regression and Stata's margins package to estimate the percentage reporting VI and condom use at first VI and to conduct statistical comparisons across time. Results VI was...