Forty-year study of rates of homicide by people with schizophrenia and other homicides in the Chuvash Republic of the Russian Federation.

The rise and fall in rates of homicide by people diagnosed with schizophrenia in parallel to total homicide suggests that homicidal behaviour might not be intrinsic to the clinical manifestations of the illness, and might instead reflect a heightened vulnerability to social factors that are associated with homicide by people without schizophrenia.