title: Prevalence and types of aggressive behaviour among adults with intellectual disabilities.
abstract: BACKGROUND
  Aggressive behaviours represent major obstacles to the integration into society of individuals with intellectual disability (ID) and pose significant management issues for carers.
  
  
  METHODS
  The present study assessed the prevalence and severity of five types of aggressive behaviours in 3165 adult men and women with ID receiving services from three rehabilitation agencies in Québec by surveying their carers using the Modified Overt Aggressive Scale.
  
  
  RESULTS
  The 12-month prevalence of aggressive behaviour was 51.8%: 24% property damage, 37.6% verbal, 24.4% self-oriented and 24.4% physical aggression, and 9.8% sexually aggressive behaviour, most of which being mild in severity. Only 4.9% of individuals displayed aggressive behaviour leading to injury of the victim. Few gender differences were observed.
  
  
  CONCLUSIONS
  The capacity to document and assess the types as well as the severity of aggressive behaviour is thus critical, not only to better understand the correlates of various types of behaviours but also to orient intervention programmes whether they be prevention, assessment, monitoring or management of aggressive behaviour.
authors.affiliation: Douglas Hospital Research Centre, LaSalle Boulevard, Montreal, QC, Canada. anne.crocker@mcgill.ca
authors.forename: A G
authors.initials: AG
authors.lastname: Crocker
authors.forename: C
authors.initials: C
authors.lastname: Mercier
authors.forename: Y
authors.initials: Y
authors.lastname: Lachapelle
authors.forename: A
authors.initials: A
authors.lastname: Brunet
authors.forename: D
authors.initials: D
authors.lastname: Morin
authors.forename: M-E
authors.initials: ME
authors.lastname: Roy
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000374:Aggression / Q000523:psychology*; D015897:Comorbidity; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000523:psychology*; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011792:Quebec / Q000453:epidemiology; D016728:Self-Injurious Behavior / Q000453:epidemiology; D045169:Severe Acute Respiratory Syndrome; D012737:Sex Factors; D012742:Sex Offenses / Q000523:psychology / Q000706:statistics & numerical data; D012920:Social Behavior Disorders / Q000453:epidemiology*; D014754:Violence / Q000523:psychology / Q000706:statistics & numerical data