Patterns of adolescent alcohol, cigarette, and marijuana use over a 6-month period.

In the current study, alcohol, cigarette, and marijuana use among adolescents (N= 794, 48.6% female) was assessed at two time points, and four patterns of use were identified: (1) abstainers: no lifetime use; (2) new users: no use at baseline but had used by the follow-up period; (3) experimenters: use prior to the baseline but no use in the period up to the follow-up; and (4) consistent users: self-report of use prior to the baseline and the follow-up. Mean levels of psychosocial variables (mastery, self-esteem, and parental social support) were compared across the four patterns of use for each substance. Only analyses including parental social support as the dependent variable were significant. Adolescents with higher levels of social support were more likely to be classified as abstainers or experimenters of alcohol than consistent users. More frequent users of cigarettes at baseline were likely to be classified as frequent users at the follow-up. The discussion focuses on the identification of the situational context of substance use for alcohol, cigarettes, and marijuana.