title: Peer Network Counseling as Brief Treatment for Urban Adolescent Heavy Cannabis Users.
abstract: A small body of evidence supports targeting adolescents who are heavy users of cannabis with brief interventions, yet more research is needed to confirm the effectiveness of these studies. We conducted a secondary analysis of our Peer Network Counseling (PNC) study (Mason et al., 2015), focusing on 46 adolescents of the sample of 119 who reported heavy cannabis use at baseline.
  
  
  
  Urban adolescents (91% African American) presenting for primary health care were randomized to intervention or control conditions and followed for 6 months. We selected cases (n = 46) to analyze based on heavy cannabis use reported at baseline (≥10 times in past month). The ordinal response data (cannabis use) were modeled using a mixed-effects proportional odds model, including fixed effects for treatment, time, and their interaction, and a subject-level random effect.
  
  
  
  In the subsample of adolescents with heavy cannabis use, those assigned to PNC had a 35.9% probability of being abstinent at 6 months, compared with a 13.2% probability in the control condition. Adolescents in the PNC condition had a 16.6% probability of using cannabis 10 or more times per month, compared with a 38.1% probability in the control condition. This differs from results of the full sample (N = 119), where no significant effects on cannabis use were found.
  
  
  
  PNC increased the probability of abstinence and reduced heavy cannabis use. These results provide initial support for PNC as a model for brief treatment with non-treatment seeking adolescents who are heavy users of cannabis.
authors.affiliation: Department of Psychiatry, Commonwealth Institute for Child & Family Studies, Virginia Commonwealth University, Richmond, Virginia.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Mason
authors.affiliation: Department of Biostatistics, Virginia Commonwealth University, Richmond, Virginia.
authors.forename: Roy
authors.initials: R
authors.lastname: Sabo
authors.affiliation: Department of Psychiatry, Commonwealth Institute for Child & Family Studies, Virginia Commonwealth University, Richmond, Virginia.
authors.forename: Nikola M
authors.initials: NM
authors.lastname: Zaharakis
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology*; D003376:Counseling / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000523:psychology / Q000628:therapy*; D010379:Peer Group; D012944:Social Support; D016896:Treatment Outcome