Background: A number of studies have reported increased violence in patients with schizophrenia.
Aims: To determine the prevalence of violence among those with schizophrenia in samples from 1949, 1969, 1989 and 2000 in Prague (Czech Republic) and to examine trends in this behaviour.
Method: Records from 404 patients meeting DSM-IV criteria for schizophrenia were screened for violence (defined as 3 points on the Modified Overt Aggression Scale) from the first observed psychotic symptoms until the time of latest available information.
Results: Logistic regression revealed a marginally significant increase in violence only in the 2000 cohort. Overall, violence was associated with schizophrenia in 41.8% of men and 32.7% of women, with no association between substance misuse and violence.
Conclusions: The violence rate found in our sample is expected to remain stable over time under stable conditions. Substance misuse is not the leading cause of violence among those with schizophrenia.
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