title: The prevalence of cyclothymia in borderline personality disorder.
abstract: Sixty patients with personality disorders were evaluated by several different diagnostic instruments to determine the prevalence of cyclothymia in borderline personality disorder (BPD) and in other personality disorders (OPD). Cyclothymia occurred more frequently in BPD than in OPD, regardless of which diagnostic system was used. In contrast, the prevalence of major, minor, and intermittent depression, hypomania, and bipolar disorder was not significantly different in BPD as compared with OPD. Cyclothymic borderlines and noncyclothymic borderlines could not be distinguished on behavioral or functional measures. These results have implications for the diagnostic validity of both BPD and cyclothymia.
authors.affiliation: University of Toronto, Ontario, Canada.
authors.forename: A J
authors.initials: AJ
authors.lastname: Levitt
authors.forename: R T
authors.initials: RT
authors.lastname: Joffe
authors.forename: J
authors.initials: J
authors.lastname: Ennis
authors.forename: C
authors.initials: C
authors.lastname: MacDonald
authors.forename: S P
authors.initials: SP
authors.lastname: Kutcher
mesh_terms: D000328:Adult; D001714:Bipolar Disorder / Q000175:diagnosis / Q000453:epidemiology; D001883:Borderline Personality Disorder / Q000150:complications* / Q000175:diagnosis / Q000453:epidemiology; D015897:Comorbidity; D003527:Cyclothymic Disorder / Q000150:complications / Q000175:diagnosis* / Q000453:epidemiology; D003866:Depressive Disorder / Q000175:diagnosis / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D019964:Mood Disorders / Q000175:diagnosis*; D010554:Personality Disorders / Q000150:complications / Q000175:diagnosis / Q000453:epidemiology; D010555:Personality Inventory; D015995:Prevalence; D011569:Psychiatric Status Rating Scales; D011594:Psychometrics