title: The Cannabis Youth Treatment (CYT) experiment: rationale, study design and analysis plans.
abstract: OBJECTIVE
  This paper provides a description of the rationale, study design, treatments and assessment procedures used in the Cannabis Youth Treatment (CYT) experiment.
  
  
  METHODS
  CYT was designed to (a) test the relative effectiveness, cost and benefit-cost of five promising treatment interventions under field conditions and (b) provide evidence based manual-guided models of these interventions to the treatment field.
  
  
  METHODS
  The study involved two community-based treatment programs and two major medical centers.
  
  
  METHODS
  Participants were 600 adolescents recruited from the regular intake who were between the ages of 12 and 18, had used marijuana in the past 90 days, and met one or more criteria of dependence or abuse.
  
  
  METHODS
  Participants were randomly assigned to one of five interventions: Motivational Enhancement Therapy (MET), Cognitive Behavioral Therapy (CBT), Family Support Network (FSN), Adolescent Community Reinforcement Approach (ACRA), or Multidimensional Family Therapy (MDFT).
  
  
  METHODS
  Self-report data were collected at intake, 3, 6, 9 and 12 months post discharge using the Global Appraisal of Individual Needs (GAIN), as well as several supplemental self-reports, collateral reports, urine testing, and service logs.
  
  
  RESULTS
  This paper reports on the study's implementation including the psychometric properties of the measures (alphas over 0.8), validity of self-report (kappa over 0.6), high rates of treatment completion (81% completed two or more months), and high rates of follow-up (over 94% per wave).
  
  
  CONCLUSIONS
  The feasibility of implementing the CYT manual-guided treatment and quality assurance model in community-based adolescent treatment programs is discussed.
authors.affiliation: Chestnut Health Systems (CHS), Bloomington, Chicago, and Madison, IL 61701, USA. mdennis@chestnut.org
authors.forename: Michael
authors.initials: M
authors.lastname: Dennis
authors.forename: Janet C
authors.initials: JC
authors.lastname: Titus
authors.forename: Guy
authors.initials: G
authors.lastname: Diamond
authors.forename: Jean
authors.initials: J
authors.lastname: Donaldson
authors.forename: Susan H
authors.initials: SH
authors.lastname: Godley
authors.forename: Frank M
authors.initials: FM
authors.lastname: Tims
authors.forename: Charles
authors.initials: C
authors.lastname: Webb
authors.forename: Yifrah
authors.initials: Y
authors.lastname: Kaminer
authors.forename: Thomas
authors.initials: T
authors.lastname: Babor
authors.forename: M C
authors.initials: MC
authors.lastname: Roebuck
authors.forename: Mark D
authors.initials: MD
authors.lastname: Godley
authors.forename: Nancy
authors.initials: N
authors.lastname: Hamilton
authors.forename: Howard
authors.initials: H
authors.lastname: Liddle
authors.forename: Christy K
authors.initials: CK
authors.lastname: Scott
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology; D002648:Child; D015928:Cognitive Behavioral Therapy / Q000379:methods; D003362:Cost-Benefit Analysis; D005196:Family Therapy / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000191:economics / Q000523:psychology / Q000628:therapy*; D009042:Motivation; D011785:Quality Assurance, Health Care; D012944:Social Support