Background: Epidemiologic studies have shown that persons suffering from psychotic
disorders are at increased risk of violent behavior. Several factors have been shown to predict
violent behavior among persons with psychosis. However, prior research is limited in that these
factors have not been explored simultaneously within the same study.
Methods: The current study, therefore, aimed to determine which demographic, clinical,
cognitive, and developmental characteristics were associated with an increased likelihood of
violence among patients diagnosed with a psychotic disorder and which combination of these
best predicted a history of violence. Participants (n=53) completed measures of demographics,
violence risk, psychotic and personality symptoms, trauma, psychopathy and cognitive
Results: Bivariate relationships were conducted to compare history of violent behavior between
all variables. Additionally, a binary logistic regression was run predicting participants’ history
of violence. Several demographic, cognitive, clinical, and developmental factors were
associated with increased odds of having a history of violence. The overall correct classification
rate for the model was 92.2%, with 87.5% of participants without a history of violence and
91.4% with a history of violence being correctly classified. The model included antisocial
personality traits, poor behavioral controls, head injury, not accepting responsibility, lacking
goals, prior supervision failures, and HCR-20 total score.
Conclusion: The binary logistic regression model showed good accuracy in predicting a history
of violence in persons with psychosis. These findings are consistent with prior research and can
inform efforts at risk assessment and identification of treatment targets for people with a
psychotic disorder who are at highest risk of violence.