title: Psychiatric conditions and behavioural problems in adolescents with intellectual disabilities: correlates with autism.
abstract: OBJECTIVE
  To determine whether psychiatric and behavioural disorders occur more frequently in adolescents with autism and intellectual disabilities, compared with those without autism.
  
  
  METHODS
  A population-based case-control study was undertaken and 36 adolescents with autism were pairwise matched for age and IQ to 36 adolescents without autism. Caregivers were interviewed with structured psychiatric interview and questionnaire measures of psychiatric and behavioural problems.
  
  
  RESULTS
  Compulsive behaviours and stereotypies were significantly more common in adolescents with autism.
  
  
  CONCLUSIONS
  Adolescents with autism are prone to compulsive behaviours and stereotypies as well as specific manifestations of anxiety, fears, and phobias.
authors.affiliation: Surrey Place Centre, Toronto, Ontario. e.bradley@utoronto.ca
authors.forename: Elspeth A
authors.initials: EA
authors.lastname: Bradley
authors.forename: Catherine S
authors.initials: CS
authors.lastname: Ames
authors.forename: Patrick F
authors.initials: PF
authors.lastname: Bolton
mesh_terms: D000293:Adolescent; D001007:Anxiety / Q000150:complications / Q000523:psychology; D001321:Autistic Disorder / Q000150:complications / Q000523:psychology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000150:complications / Q000523:psychology*; D008297:Male; D001523:Mental Disorders / Q000150:complications / Q000523:psychology*; D009771:Obsessive-Compulsive Disorder / Q000150:complications / Q000523:psychology; D010698:Phobic Disorders / Q000150:complications / Q000523:psychology; D011569:Psychiatric Status Rating Scales; D012307:Risk Factors; D016728:Self-Injurious Behavior / Q000150:complications / Q000523:psychology; D013239:Stereotyped Behavior; D055815:Young Adult