title: Parental involvement in brief interventions for adolescent marijuana use.
abstract: Adolescents (aged 12-18 years) identified in a school setting as abusing marijuana and other drugs were randomly assigned to complete 1 of 2 brief interventions (BIs). Adolescents and their parent (N = 259) were randomly assigned to receive either a 2-session adolescent only (BI-A) or a 2-session adolescent and additional parent session (BI-AP). Interventions were manualized and delivered in a school setting by trained counselors. Adolescents were assessed at intake and at 6 months following the completion of the intervention. Using a latent construct representing 6-month marijuana use outcomes, current findings supported previous research that BI-AP resulted in superior outcomes when compared to BI-A. The presence of a marijuana dependence diagnosis at baseline predicted poorer outcomes when compared to youth without a diagnosis. Both baseline diagnostic status and co-occurring conduct problems interacted with intervention condition in predicting marijuana use outcomes. A marijuana dependence diagnosis resulted in poorer marijuana use outcomes within the BI-A condition when compared to BI-AP. Co-occurring conduct problems were associated with poorer marijuana use outcomes within the BI-AP intervention when compared to BI-A. Implications for implementing BIs given diagnostic status, parent involvement, and co-occurring conduct problems are discussed.
authors.affiliation: Department of Family Social Science.
authors.forename: Timothy F
authors.initials: TF
authors.lastname: Piehler
authors.affiliation: Department of Psychiatry, University of Minnesota Medical School.
authors.forename: Ken C
authors.initials: KC
authors.lastname: Winters
mesh_terms: D000293:Adolescent; D015897:Comorbidity; D019955:Conduct Disorder / Q000453:epidemiology; D005196:Family Therapy / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000453:epidemiology / Q000628:therapy*; D010290:Parents; D011614:Psychotherapy, Brief / Q000379:methods*; D016896:Treatment Outcome