© 2003 The Royal College of Psychiatrists
Impact of comorbid personality disorder on violence in psychosis
Report from the UK700 trial
Health Services Research Department, Institute of Psychiatry, London
Section of Forensic Mental Health, Department of Psychiatry, Institute of Psychiatry, London
Department of Psychological Medicine, Imperial College, London
Department of Psychiatry, St George's Hospital Medical School, London
School of Psychiatry and Behavioural Science, Manchester Royal Infirmary, Manchester
Section of Forensic Mental Health, Department of Psychiatry, Institute of Psychiatry, London, UK
Correspondence: Dr Paul Moran, Health Services Research Department, Institute of Psychiatry, De Crespigny Park, London SE5 8AF, UK. Tel: 020 7848 0568; fax: 020 7848 0333; e-mail: paul.moran{at}iop.kcl.ac.uk
Declaration of interest P.M. was funded by a Department of Health postdoctoral training fellowship. The UK700 trial was funded by grants from the UK Department of Health and the NHS R&D programme.
Background The impact of comorbid personality disorder on the occurrence of violence in psychosis has not been fully explored.
Aims To examine the association between comorbid personality disorder and violence in community-dwelling patients with psychosis.
Method A total of 670 patients with established psychotic illness were screened for comorbid personality disorder. Physical assault was measured from multiple data sources over the subsequent 2 years. Logistic regression was used to assess whether the presence of comorbid personality disorder predicted violence in the sample.
Results A total of 186 patients (28%) were rated as having a comorbid personality disorder. Patients with comorbid personality disorder were significantly more likely to behave violently over the 2-year period of the trial (adjusted odds ratio=1.71, 95% CI 1.05-2.79).
Conclusions Comorbid personality disorder is independently associated with an increased risk of violent behaviour in psychosis.
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