The Cannabis Youth Treatment (CYT) Study: Main findings from two randomized trials

Michael Dennis, Susan H. Godley, Guy Diamond, Frank M. Tims, Thomas Babor, Jean Donaldson, Howard A Liddle, Janet C. Titus, Yifrah Kaminer, Charles Webb, Nancy Hamilton, Rod Funk

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528 Scopus citations

Abstract

This article presents the main outcome findings from two inter-related randomized trials conducted at four sites to evaluate the effectiveness and cost-effectiveness of five short-term outpatient interventions for adolescents with cannabis use disorders. Trial 1 compared five sessions of Motivational Enhancement Therapy plus Cognitive Behavioral Therapy (MET/CBT) with a 12-session regimen of MET and CBT (MET/CBT12) and another that included family education and therapy components (Family Support Network [FSN]). Trial II compared the five-session MET/CBT with the Adolescent Community Reinforcement Approach (ACRA) and Multidimensional Family Therapy (MDFT). The 600 cannabis users were predominately white males, aged 15-16. All five CYT interventions demonstrated significant pre-post treatment during the 12 months after random assignment to a treatment intervention in the two main outcomes: days of abstinence and the percent of adolescents in recovery (no use or abuse/dependence problems and living in the community). Overall, the clinical outcomes were very similar across sites and conditions; however, after controlling for initial severity, the most cost-effective interventions were MET/CBT5 and MET/CBT12 in Trial 1 and ACRA and MET/CBT5 in Trial 2. It is possible that the similar results occurred because outcomes were driven more by general factors beyond the treatment approaches tested in this study; or because of shared, general helping factors across therapies that help these teens attend to and decrease their connection to cannabis and alcohol.

Original languageEnglish
Pages (from-to)197-213
Number of pages17
JournalJournal of Substance Abuse Treatment
Volume27
Issue number3
DOIs
StatePublished - Oct 1 2004

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Keywords

  • Adolescents
  • Cost-effectiveness
  • Manual-guided therapy
  • Marijuana
  • Treatment effectiveness

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Neuroscience(all)

Cite this

Dennis, M., Godley, S. H., Diamond, G., Tims, F. M., Babor, T., Donaldson, J., Liddle, H. A., Titus, J. C., Kaminer, Y., Webb, C., Hamilton, N., & Funk, R. (2004). The Cannabis Youth Treatment (CYT) Study: Main findings from two randomized trials. Journal of Substance Abuse Treatment, 27(3), 197-213. https://doi.org/10.1016/j.jsat.2003.09.005