title: Predictors of cannabis use in men with and without psychosis.
abstract: BACKGROUND
  Factors associated with cannabis use among people with psychosis are not well understood.
  
  
  OBJECTIVE
  To examine whether people with psychosis and age-matched controls modified cannabis use in response to recent experiences.
  
  
  METHODS
  This study predicted 4 weeks of cannabis use prospectively, using expectancies derived from recent occasions of use.
  
  
  RESULTS
  People with psychosis used cannabis less frequently than controls, but had more cannabis-related problems. More negative cannabis expectancies resulted in less frequent cannabis use over Follow-up. The psychosis group was more likely to moderate cannabis use after negative effects than controls.
  
  
  CONCLUSIONS
  Results offer optimism about abilities of people with psychosis to moderate cannabis use in the short term.
authors.affiliation: Community Forensic Mental Health Service, 42 Albert St, Brisbane 4000, Australia. bobgreen@health.qld.gov.au
authors.forename: Bob
authors.initials: B
authors.lastname: Green
authors.forename: David J
authors.initials: DJ
authors.lastname: Kavanagh
authors.forename: Ross McD
authors.initials: RM
authors.lastname: Young
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D017831:Diagnosis, Dual (Psychiatry); D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000523:psychology*; D008875:Middle Aged; D011237:Predictive Value of Tests; D011446:Prospective Studies; D011605:Psychoses, Substance-Induced / Q000209:etiology*; D011618:Psychotic Disorders / Q000523:psychology*; D012307:Risk Factors