Current Cannabis Projects

Teen Marijuana Check-Up 3

PI: Roger Roffman
Co-PI: Robert S. Stephens, Virginia Polytechnic Institute and State University
Clinical Director: Denise Walker

Funding Source: National Institute on Drug Abuse Grant No. 2 RO1 DA 14296-04.

Start/End Dates: September 2004 through June 2009

Description: This study is a continuation of 2 previous NIDA-funded projects that developed and evaluated the acceptability and preliminary efficacy of a brief intervention (The Teen Marijuana Check-Up) intended to attract voluntary participation from adolescents who smoke marijuana. The interventions are designed to provide adolescents who are not seeking treatment with an opportunity to weigh the pros and cons of smoking marijuana through the provision of objective information regarding marijuana use. The present study will evaluate the efficacy of this intervention with an adequate sample size to determine its impact on adolescent marijuana use and readiness to change. 300 teens from six Seattle high schools will be enrolled over a 3-year period. Participants will complete a computerized assessment pre-intervention and 3 and 12-months post-intervention.

Past Cannabis Projects

Marijuana Treatment Project

PI: Roger Roffman
Co-PI: Robert S. Stephens, Virginia Polytechnic Institute and State University
Clinical Director: Denise Walker

Funding Source: National Institutes of Health Grant No. 1 RO 1 DA14050-01A1.

Start/End Dates: September 2001 through August 2006

Description: In this randomized controlled trial, two alternate formats of a counseling intervention are being evaluated. Adults who meet diagnostic criteria for marijuana dependence are randomized to either 9 sessions of individual counseling, or 4 sessions plus the opportunity to return for additional sessions, if needed, over a 30-month period. Both conditions involve cognitive behavioral skills training, motivational enhancement therapy, and case management. All participants are re-assessed periodically over a 3-year period.

"Teen Marijuana Check-Up 2" (Sep. 2001 - Aug. 2004)

PI: Roger Roffman
Co-PI: Robert S. Stephens, Virginia Polytechnic Institute and State University
Clinical Director: Denise Walker

Funding Source: National Institute on Drug Abuse Grant No. 1 RO1 DA 14296-01.

Description: In this randomized controlled trial, a brief motivational enhancement intervention was evaluated with non-treatment-seeking adolescents in four Seattle high schools. Participants were offered a personalized feedback report concerning their marijuana use. Specific goals for change and behavior change strategies were discussed with participants who wish support in making changes.

PI: Roger Roffman
Co-PI: Robert S. Stephens, Virginia Polytechnic Institute and State University
Clinical Director: Denise Walker

Funding Source: National Institute on Drug Abuse Grant No. 1 RO1 DAO9425.

Description: This study was a continuation of a previous NIDA-funded project that evaluated a brief intervention (The Marijuana Check-Up) for adult marijuana smokers who had concerns about their use, but were not ready to change. This study will evaluate an extended version of the check-up intervention that offers four additional sessions to participants.

PI: Roger Roffman
Funding Source: Supplement to NIDA Grant No. 1 RO1 DAO9425-01A2.

PI: Roger Roffman
Funding Source: SAMHSA/CSAT Grant 1 UR4 TI11270.

PI: Roger Roffman
Funding Source: Alcohol and Drug Abuse Institute, University of Washington.

PI: Roger Roffman
Funding Source: NIDA Grant DAO3586.

PI: Roger Roffman
Funding Source: NIDA Grant DAO3586.