Psychopathy and Axis I and Axis II psychiatric disorders in a forensic psychiatric population in Sweden.

The relationship between psychopathy and mental disorders was investigated in 61 male subjects during a forensic psychiatric examination. The Psychopathy Checklist Revised (PCL-R) and the Structured Clinical Interview for DSM-III-R (SCID) were used for the assessments. Although psychotic subjects were excluded, the overall psychiatric morbidity in the study population was high. Comorbidity was common, irrespective of the degree of psychopathy. Psychopathy was strongly positively correlated with substance abuse/dependence but negatively correlated with depression. Almost all of the subjects with high PCL-R scores had DSM-III-R antisocial and/or borderline personality disorders. However, some subjects with antisocial personality disorders had medium or low PCL-R scores. When the subjects were reassessed with diagnoses of DSM-IV and ICD-10 personality disorders, the difference between psychopathy and antisocial personality disorder was reduced.