This study examined the timing of several events marking the transitio
n from adolescence to young adulthood and their correlation with the a
ge at first sexual intercourse. The model included parental disruption
, dropping out of school, working, drug use, and dating. Socioeconomic
status, gender, and race were included as control variables. Data are
taken from the National Survey of Children, a longitudinal study of c
hildren ages 7-11 in 1976 who were reinterviewed in 1981 and 1986. Fac
tors associated with first intercourse include age, tobacco use, marij
uana use, dating, and parental divorce during the child's adolescent y
ears. Age interacts with dating, working, and the use of illegal subst
ances, and race interacts with dating and dropping out of school in th
eir influence on first intercourse. Other transitions, such as alcohol
use, parental divorce before adolescence, and parental marriage, had
little influence on first sexual intercourse. Events such as dating ap
pear to increase the risk of first intercourse, while the use of drugs
may reflect a set of behaviors that occur simultaneously with sexual
initiation. The correlated transitions identify a group of adolescents
at risk for early sexual activity.