The Teen Marijuana Check-Up (TMCU3)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00350285
Recruitment Status : Completed
First Posted : July 10, 2006
Last Update Posted : October 23, 2008
National Institute on Drug Abuse (NIDA)
Information provided by:
University of Washington

Brief Summary:
This behavioral research is an efficacy trial evaluating an intervention called "The Teen Marijuana Check-Up" with non-treatment seeking adolescent marijuana users.

Condition or disease Intervention/treatment Phase
Cannabis Abuse Cannabis Dependence Behavioral: Motivational enhancement therapy Behavioral: Marijuana education Phase 2

Detailed Description:

Three hundred adolescents who smoke marijuana (ages 14-19), recruited in four Seattle-area high schools, will be enrolled in the trial. Participants will be recruited either through in-class presentations focusing on marijuana or via referrals from school staff. They will first be assessed regarding use of marijuana, alcohol, and other drugs, as well as pertinent attitudes and goals. Participants will then be randomly assigned to one of three conditions.

  • The experimental intervention is a two-session motivational enhancement treatment. A personalized feedback report, containing information from the participant's assessment as well as normative comparison data, is reviewed, with the Health Educator employing motivational interviewing strategies intended to enhance motivation for reduction or cessation of marijuana use. Specific goals for change and behavior change strategies are discussed with participants who wish support to change their marijuana use.
  • The comparison condition involves two educational sessions focusing on the health and behavioral effects of marijuana.
  • The third condition (delayed treatment control) involves a minimal baseline assessment followed three months later by a reassessment interview. Those assigned to this condition will then be given their choice of either active treatment.

Following completion of their two intervention sessions, participants in the two active treatments will be offered an additional four sessions of cognitive-behavioral skills training in which the focus is strategies in quitting marijuana. All participants will be reassessed at 3 and 12 months following their initial assessment interviews.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 310 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Reaching and Motivating Change in Teen Marijuana Smokers
Study Start Date : September 2004
Actual Primary Completion Date : June 2008
Actual Study Completion Date : June 2008

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Marijuana

Arm Intervention/treatment
Experimental: 1
Motivational enhancement therapy
Behavioral: Motivational enhancement therapy
Personal feedback with counselor using motivational interviewing strategies.

Active Comparator: 2
Marijuana education
Behavioral: Marijuana education
Information about health and behavioral effects of marijuana use.

No Intervention: 3
Delayed treatment control condition

Primary Outcome Measures :
  1. Self-report of marijuana use [ Time Frame: 3 months and 12 months ]

Secondary Outcome Measures :
  1. Accepting abstinence-focused counseling [ Time Frame: 3 months and 12 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   14 Years to 19 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria: Individuals who contact the project will be screened according to the following inclusion criteria:

  • age (14-19 years old),
  • grade level (freshmen through seniors) and
  • marijuana use (smoked 9 or more days in past 30).

Exclusion Criteria: Individuals will be excluded if:

  • they are not fluent in English,
  • they have a thought disorder that precludes full participation,
  • they refuse to accept randomization to condition.

In addition to the inclusion and exclusion criteria, participants who appear to be in psychological or physical distress will be assessed further and referred to other services as appropriate. The need for other services will not necessarily preempt participation in the TMCU unless the individual is incapable or unwilling to complete the protocol. As was the case in our Stage 1b trial, all ineligible applicants will be offered a single feedback session, and the Strategies That Work booklet will be offered to those who indicate any interest in reducing or quitting marijuana use.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00350285

Sponsors and Collaborators
University of Washington
National Institute on Drug Abuse (NIDA)
Principal Investigator: Roger A Roffman, DSW University of Washington School of Social Work

Responsible Party: Roger A. Roffman /Professor, University of Washington Identifier: NCT00350285     History of Changes
Other Study ID Numbers: 01-8666-G-05
R01DA014296 ( U.S. NIH Grant/Contract )
First Posted: July 10, 2006    Key Record Dates
Last Update Posted: October 23, 2008
Last Verified: October 2008

Keywords provided by University of Washington:

Additional relevant MeSH terms:
Marijuana Abuse
Substance-Related Disorders
Chemically-Induced Disorders
Mental Disorders