title: Mental health of teenagers who use cannabis. Results of an Australian survey.
abstract: BACKGROUND
  There is concern in the community about increasing cannabis use and its potential effect on health.
  
  
  OBJECTIVE
  To ascertain the prevalence of cannabis use among Australian adolescents, associations with mental health problems, risk behaviours and service use.
  
  
  METHODS
  Examination of data from a national representative sample of households comprising 1261 adolescents aged 13-17 years. Parents completed a psychiatric interview and questionnaires while adolescents completed questionnaires.
  
  
  RESULTS
  One-quarter of the adolescents in the sample had used cannabis. There were no gender differences. Use increased rapidly with age, was more common in adolescents living with a sole parent and was associated with increased depression, conduct problems and health risk behaviours (smoking, drinking) but not with higher use of services.
  
  
  CONCLUSIONS
  Cannabis use is very prevalent. The association with depression, conduct problems, excessive drinking and use of other drugs shows a malignant pattern of comorbidity that may lead to negative outcomes.
authors.affiliation: University of Sydney, Coral Tree Family Service, North Ryde, New South Wales, Australia. jrey@mail.usyd.edu.au
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Rey
authors.forename: Michael G
authors.initials: MG
authors.lastname: Sawyer
authors.forename: Beverley
authors.initials: B
authors.lastname: Raphael
authors.forename: George C
authors.initials: GC
authors.lastname: Patton
authors.forename: Michael
authors.initials: M
authors.lastname: Lynskey
mesh_terms: D000293:Adolescent; D001315:Australia / Q000453:epidemiology; D003866:Depressive Disorder / Q000139:chemically induced / Q000175:diagnosis; D005191:Family Characteristics; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D002189:Marijuana Abuse / Q000150:complications / Q000453:epidemiology*; D008385:Marijuana Smoking / Q000009:adverse effects / Q000453:epidemiology*; D001523:Mental Disorders / Q000453:epidemiology; D008603:Mental Health; D015999:Multivariate Analysis; D015995:Prevalence; D011569:Psychiatric Status Rating Scales; D012309:Risk-Taking; D011795:Surveys and Questionnaires