Schizophrenia Bulletin Advance Access originally published online on February 16, 2005
Schizophrenia Bulletin 2005 31(3):759-768; doi:10.1093/schbul/sbi015
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Violence of Young Criminals Predicts Schizophrenia: A 9-Year Register-Based Followup of 15- to 19-Year-Old Criminals
Research Assistant, Clinic of Forensic Psychiatry, Ministry of Justice, Copenhagen, Denmark
Head of Clinic, Clinic of Forensic Psychiatry, Ministry of Justice, Copenhagen, Denmark
Associate Professor, Statistics Group, Copenhagen School of Business, Copenhagen, Denmark
Associate Professor, Institute of Public Health, Department of Health Services Research, Faculty of Health Sciences, University of Copenhagen, Denmark
Consultant and Staff Psychiatrist, Department of Psychiatry, H.S. Frederiksberg Hospital, Frederiksberg, Denmark
Send reprint requests to Dr. N.P. Gosden, Folevadsvej 14, Copenhagen 2400 NV, Denmark; e-mail: npg{at}dadlnet.dk.
Violent and aggressive behavior in preschizophrenia adolescents has been described in several studies. Our aim was to investigate the extent to which violent conviction in late adolescence predicted later schizophrenia in a cohort of young criminals. We performed a 9-year register-based followup of a complete national cohort of young convicted criminals. A total of 780, 15- to 19-year-old subjects identified in 1992 were followed up in 2001 with register linkage of the Danish Psychiatric Central Register, the Danish National Criminal Register, and the Danish National Cause of Death Register. Analyses with Cox regression were performed to identify predictors of later schizophrenia. We found at followup that 3.3 percent of the cohort had been diagnosed with schizophrenia and 4.5 percent with any psychosis. Conviction of violence in late adolescence was significantly associated (odds ratio = 4.59 [95% confidence interval (1.54; 13.74)]) with future diagnosis of schizophrenia. Violent behavior can thus be seen as part of the preschizophrenia phase of young criminals.
Keywords: Predictor / prevalence / register study / schizophrenia / violence
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