Original articleDevelopmental relationships between adolescent substance use and risky sexual behavior in young adulthood
Section snippets
Sample and procedure
The participants in this study are 808 youths who participated in the Seattle Social Development Project (SSDP). They were recruited in the fall of 1985 from all fifth-grade students attending 18 Seattle elementary schools serving high-crime neighborhoods (N = 1053). Of these 1053 fifth-grade students, 808 (77%) consented to take part in a longitudinal study. Four-hundred-and-twelve (51%) of the sample were male; 372 (46%) were European-American, 195 (24%) were African-American, 170 (21%) were
Trajectory groups of adolescent substance use
Using SGM procedures, we tested one-group to five-group models of trajectories of binge-drinking and marijuana use; one-group to six-group models of trajectories of cigarette smoking; and one-group to four-group models of trajectories of other illicit drug use. Based on the BIC criterion, as well as a requirement that at least 1% of the sample was included in each trajectory group, a four-group model was selected as the best-fitting model for binge-drinking and marijuana use. A five-group model
Discussion
We identified qualitatively distinct trajectories of adolescent binge-drinking, cigarette smoking, marijuana use, and other illicit drug use using prospective longitudinal data from the Seattle Social Development Project (SSDP). Overall, these substance use trajectories were found to have unique and significant relationships with risky sexual behavior in young adulthood with the exception of other illicit drug use trajectories. Adolescent binge-drinking trajectories were significantly related
Acknowledgements
This research was supported by research grants #1R03DA13382-01 and #R01DA09679 from the National Institute on Drug Abuse, and a grant from the Robert Wood Johnson Foundation. Points of view are those of the authors and not the official positions of the funding agencies.
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