Social and Behavioral Sciences Commons^™

Early Adolescent Through Young Adult Alcohol And Marijuana Use Trajectories: Early Predictors, Young Adult Outcomes, And Predictive Utility, Kate Flory, Donald Lynam, Richard Milich, Carl Leukefeld, Richard Clayton

Psychology Faculty Publications

The present study takes a developmental approach to subgrouping and examines the trajectories of substance use from early adolescence through young adulthood among a community sample of 481 individuals. The patterns of use were examined, subgroups were identified separately for men and women and for alcohol and marijuana, and psychosocial predictors and psychopathology outcomes that differentiated the groups were identified. The results revealed three substantially overlapping subgroups for both alcohol and marijuana: early onset, late onset, and nonuser. Although the general patterns of which dependent variables were related to group were similar for alcohol and marijuana, a closer examination revealed …