The psychiatric epidemiology of violent behaviour

This paper reviews the current state of the debate on the relationship betw een mental disorder and violent behaviour. Starting from the discussion of methodological approaches to assessing a possible association, the most imp ortant studies carried out on the issue in recent years are discussed. Thei r results concur in supporting the assumption that there is a moderate but reliable association between mental disorder and violence. However, this do es not imply that people with mental illness are generally more likely to c ommit violent acts than members of the general population. An elevated risk of violent behaviour is only evident for specific psychiatric diagnoses an d symptom constellations. For schizophrenia and other psychotic disorders, a significant increase in the likelihood to commit violent acts is reported . Substance use disorders and antisocial personality disorder, however, rep resent a markedly higher risk for violent behaviour. The article further di scusses possible determinants of violent behaviour such as psychotic sympto ms and comorbidity with substance abuse and considers who is at particular risk of becoming a target of violent acts.