title: PDQ-R personality disorders in bipolar patients.
abstract: The prevalence of personality traits and disorders in bipolar patients as reported in the literature varies widely. The Personality Diagnostic Questionnaire-Revised (PDQ-R) is a self-report instrument for DSM-IIIR personality disorders found to have validity, but with high sensitivity and moderate specificity. This study was designed to assess personality disorders in bipolar patients using the PDQ-R. Fifty bipolar patients in a long-term lithium treatment program completed the PDQ-R. Over one half the patients (58%) scored for one or more personality disorders. A total of 71 diagnoses was made among the 50 patients, or a mean of 1.42 per patient. The majority of the axis II diagnoses were from cluster B, with borderline the most prevalent, followed by histrionic. The PDQ-R has high sensitivity but moderate specificity and may overdiagnose personality disorders in bipolar patients. The PDQ-R may register subclinical aspects of affective disorder as personality.
authors.affiliation: St. Vincent's Hospital and Medical Center, New York, NY.
authors.forename: R A
authors.initials: RA
authors.lastname: O'Connell
authors.forename: J A
authors.initials: JA
authors.lastname: Mayo
authors.forename: M S
authors.initials: MS
authors.lastname: Sciutto
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000928:Antidepressive Agents / Q000627:therapeutic use; D001714:Bipolar Disorder / Q000175:diagnosis* / Q000188:drug therapy / Q000523:psychology*; D002220:Carbamazepine / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008094:Lithium / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D010554:Personality Disorders / Q000175:diagnosis* / Q000188:drug therapy / Q000523:psychology*; D010555:Personality Inventory / Q000706:statistics & numerical data*; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics
chemical_list: D000928:Antidepressive Agents; D002220:Carbamazepine; D008094:Lithium