Parental involvement in brief interventions for adolescent marijuana use

Area of Science:

• Adolescent psychology
• Substance abuse treatment
• Clinical intervention research

Background:

• Adolescent substance abuse, particularly marijuana use, is a significant public health concern.
• Brief interventions (BIs) are increasingly utilized in school settings for adolescent drug abuse.
• The role of parental involvement and co-occurring conditions in intervention efficacy requires further investigation.

Purpose of the Study:

• To compare the effectiveness of two brief intervention formats for adolescent marijuana and drug abuse.
• To examine the impact of parental involvement within brief interventions.
• To investigate how baseline marijuana dependence and conduct problems moderate intervention outcomes.

Main Methods:

• Randomized controlled trial involving 259 adolescents (aged 12-18) identified with substance abuse in schools.
• Two manualized, 2-session brief interventions were administered: adolescent-only (BI-A) and adolescent plus parent session (BI-AP).
• Outcomes assessed at intake and 6-month follow-up using marijuana use measures, considering diagnostic status and co-occurring conduct problems.

Main Results:

• The brief intervention with parent involvement (BI-AP) demonstrated superior 6-month marijuana use outcomes compared to the adolescent-only intervention (BI-A).
• Adolescents with a baseline marijuana dependence diagnosis showed poorer outcomes than those without.
• Interactions revealed that marijuana dependence worsened outcomes in BI-A, while conduct problems were associated with poorer outcomes in BI-AP.

Conclusions:

• Parental involvement in brief interventions significantly enhances outcomes for adolescent marijuana abuse.
• Tailoring interventions based on diagnostic status (marijuana dependence) and co-occurring conduct problems is crucial for optimizing effectiveness.
• School-based brief interventions can be adapted to incorporate parental sessions and address specific adolescent needs.