Personality disorders and associated features in cocaine-dependent inpatients

Abstract

Previous research has shown a high prevalence of comorbid personality disorders among individuals seeking treatment for cocaine dependence. We studied axis II disorders (using the Structured Clinical Interview for DSM-III-R Personality Disorders [SCID-II]) in 50 patients admitted for inpatient rehabilitation. All patients met lifetime criteria for cocaine dependence and reported cocaine use during the month before admission. Seventy percent of patients met criteria for at least one axis II diagnosis; the mean number of axis II diagnoses among these patients was 2.54 (range, one to six). The most common axis II diagnosis was borderline (34% of all patients), followed by antisocial and narcissistic (each 28%), avoidant and paranoid (each 22%), obsessive-compulsive (16%), and dependent (10%). To evaluate the relationship between comorbid personality pathology, substance abuse, and other psychiatric symptomatology, patients were divided into two groups based on whether they received an axis II disorder diagnosis. The groups did not differ on substance abuse variables. However, there were significant group differences on a measure of psychosis proneness and in the number of comorbid depressive and anxiety disorder diagnoses. These results are consistent with other studies of personality disorders in substance abuse patients, and suggest that it may be clinically useful to characterize cocaine-dependent patients with respect to comorbid axis II disorders.

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