title: Indicated prevention for college student marijuana use: a randomized controlled trial.
abstract: OBJECTIVE
  Marijuana is the most frequently reported illicit substance used on college campuses. Despite the prevalence, few published intervention studies have focused specifically on addressing high-risk marijuana use on college campuses. The present study evaluated the efficacy of an in-person brief motivational enhancement intervention for reducing marijuana use and related consequences among frequently using college students.
  
  
  METHODS
  Participants included 212 college students from 2 campuses who reported frequent marijuana use (i.e., using marijuana at least 5 times in the past month). Participants completed Web-based screening and baseline assessments and upon completion of the baseline survey were randomized to either an in-person brief intervention or an assessment control group. Follow-up assessments were completed approximately 3 and 6 months post-baseline. Marijuana use was measured by number of days used in the past 30 days, typical number of joints used in a typical week in the last 60 days, and marijuana-related consequences.
  
  
  RESULTS
  Results indicated significant intervention effects on number of joints smoked in a typical week and a trend toward fewer marijuana-related consequences compared with the control group at 3-month follow-up.
  
  
  CONCLUSIONS
  This study provides preliminary data on short-term effects of a focused marijuana intervention for college students at reducing marijuana use during the academic quarter.
authors.affiliation: Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, WA 98195, USA. leecm@uw.edu
authors.forename: Christine M
authors.initials: CM
authors.lastname: Lee
authors.forename: Jason R
authors.initials: JR
authors.lastname: Kilmer
authors.forename: Clayton
authors.initials: C
authors.lastname: Neighbors
authors.forename: David C
authors.initials: DC
authors.lastname: Atkins
authors.forename: Cheng
authors.initials: C
authors.lastname: Zheng
authors.forename: Denise D
authors.initials: DD
authors.lastname: Walker
authors.forename: Mary E
authors.initials: ME
authors.lastname: Larimer
mesh_terms: D000293:Adolescent; D000328:Adult; D030141:Feedback, Psychological / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000517:prevention & control*; D009042:Motivation / Q000502:physiology; D011614:Psychotherapy, Brief / Q000379:methods*; D013334:Students / Q000523:psychology*; D016896:Treatment Outcome; D014495:Universities; D055815:Young Adult