title: A randomized controlled trial of a brief motivational enhancement for non-treatment-seeking adolescent cannabis users.
abstract: Evidence for negative effects of early-onset cannabis use has led to a need for effective interventions targeting adolescent cannabis users. A randomized controlled trial of an Australian two-session intervention based on motivational interviewing (the ACCU, or Weed-Check in Dutch) was replicated in a larger Dutch sample of 119 non-treatment-seeking adolescent cannabis users. Outcome measures at the 3-month follow-up were quantity and frequency of cannabis use, symptoms of dependence, stage of change, and psychosocial functioning. Changes in all measures were in the expected direction, yet not significant. In moderation analyses, heavier cannabis users at baseline receiving the Weed-Check had greater reductions in cannabis use than those in the control condition. These results suggest that the Weed-Check might be beneficial for heavier cannabis-using adolescents. Further research is needed to confirm these results in a sample of adolescent heavy cannabis users and to examine the relationship between MI skills of prevention workers and outcome.
authors: Trimbos Institute, Postbus 725, 3500 AS Utrecht, The Netherlands. Electronic address: agee@trimbos.nl.
authors: Elisabeth A
authors: EA
authors: de Gee
authors: Trimbos Institute, Postbus 725, 3500 AS Utrecht, The Netherlands.
authors: Jacqueline E E
authors: JE
authors: Verdurmen
authors: Trimbos Institute, Postbus 725, 3500 AS Utrecht, The Netherlands.
authors: Els
authors: E
authors: Bransen
authors: University of Applied Sciences Windesheim, Postbus 10090, 8000 GB Zwolle, The Netherlands.
authors: Jannet M
authors: JM
authors: de Jonge
authors: Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
authors: Gerard M
authors: GM
authors: Schippers
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000534:rehabilitation*; D009042:Motivation; D062405:Motivational Interviewing; D009426:Netherlands; D018579:Patient Selection; D011594:Psychometrics / Q000379:methods; D012959:Socioeconomic Factors; D016896:Treatment Outcome
keywords: Adolescents; Cannabis; Check-up; Indicated prevention; Motivational interviewing