The systematic review, published in the journal JAMA Psychiatry, looked at 24 studies which covered more than 50,000 people with schizophrenia across 15 countries over four decades. Professor Seena Fazel of Oxford’s Department of Psychiatry said: 'The perception that schizophrenia is associated with violent behaviour attracts considerable media attention and occasionally misleading headlines. 'The clear message is that violence perpetration is an important outcome to prevent in people with schizophrenia. The full paper, 'Association of Schizophrenia Spectrum Disorders and Violence Perpetration in Adults and Adolescents from 15 Countries. A Systematic Review and Meta-Analysis', can be read in JAMA Psychiatry.