In light of the clinical importance of understanding co-morbidity within offender populations, the purpose of this paper is to examine the prevalence and comorbidities of clinical disorder (Axis I) and personality disorder (Axis II) within a sample of high risk, male offenders located in a high secure, prison-based personality disorder treatment service.
The study utilised clinical assessment data for both Axis I diagnoses (Structured Clinical Interview for DSM-IV) and Axis II diagnoses (International Personality Disorder Examination) of 115 personality disordered offenders who met the criteria for the treatment service between 2004 and 2015.
Co-morbidity between Axis I and Axis II diagnoses was high, with 81 per cent of the sample having co-morbid personality disorder and clinical disorder diagnosis. The most prevalent Axis I disorder was substance misuse, and Axis II was antisocial, borderline, and paranoid personality disorder. Following χ2 analysis, Cluster A personality disorder demonstrated co-morbidity with both mood disorder and schizophrenia/other psychotic disorder. Paranoid, schizoid, narcissistic, and avoidant personality disorder demonstrated a level of co-morbidity with Axis I disorders. There was no association found between the clinical disorders of substance use and anxiety with any personality disorder within this sample.
In part these results suggest that certain Axis II disorders may increase the risk of lifetime Axis I disorders.
The findings of no co-morbidity between the clinical disorders of substance use and anxiety with any personality disorder within sample are inconsistent to previous findings.
Bennett, A. and Johnson, D. (2017), "Co-morbidity of personality disorder and clinical syndrome in high-risk incarcerated offenders", The Journal of Forensic Practice, Vol. 19 No. 3, pp. 207-216. https://doi.org/10.1108/JFP-05-2016-0026Download as .RIS
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