title: Differentiating the bipolar disorders from borderline personality disorder.
abstract: OBJECTIVE
  To identify features differentiating bipolar disorder (BP) from borderline personality disorder (BPD) and with each condition variably defined.
  
  
  METHODS
  Participants were assigned a BP or BPD diagnosis on the basis of DSM criteria and, separately, by clinical judgment, and undertook a diagnostic interview and completed self-report measures.
  
  
  RESULTS
  Predictors of BPD status varied according to diagnostic decisions, but with the most consistent items being childhood sexual abuse, childhood depersonalization, personality variables relating to relationship difficulties and sensitivity to criticism, and the absence of any BP family history. Across diagnostic groups, personality measure items alone predicted diagnostic allocation with an accuracy of 81-84%, the refined study variables other than hypo/manic features improved the classification rates to 88%, and when the presence or absence of hypo/manic features was added, classification rates increased to 92-95%.
  
  
  CONCLUSIONS
  Study findings indicate that BPD can be differentiated from BP with a high degree of accuracy.
authors.affiliation: School of Psychiatry, The University of New South Wales, Sydney, NSW, Australia.
authors.forename: A J
authors.initials: AJ
authors.lastname: Bayes
authors.affiliation: School of Psychiatry, The University of New South Wales, Sydney, NSW, Australia.|The Black Dog Institute, Sydney, NSW, Australia.
authors.forename: G
authors.initials: G
authors.lastname: McClure
authors.affiliation: School of Psychiatry, The University of New South Wales, Sydney, NSW, Australia.|The Black Dog Institute, Sydney, NSW, Australia.
authors.forename: K
authors.initials: K
authors.lastname: Fletcher
authors.affiliation: Marina Baixa Hospital, Villjoysa, Spain.
authors.forename: Y E
authors.initials: YE
authors.lastname: Román Ruiz Del Moral
authors.affiliation: School of Psychiatry, The University of New South Wales, Sydney, NSW, Australia.|The Black Dog Institute, Sydney, NSW, Australia.
authors.forename: D
authors.initials: D
authors.lastname: Hadzi-Pavlovic
authors.affiliation: Westmead Hospital, Sydney, NSW, Australia.
authors.forename: J L
authors.initials: JL
authors.lastname: Stevenson
authors.affiliation: The Black Dog Institute, Sydney, NSW, Australia.
authors.forename: V L
authors.initials: VL
authors.lastname: Manicavasagar
authors.affiliation: School of Psychiatry, The University of New South Wales, Sydney, NSW, Australia.|The Black Dog Institute, Sydney, NSW, Australia.
authors.forename: G B
authors.initials: GB
authors.lastname: Parker
mesh_terms: D000293:Adolescent; D001714:Bipolar Disorder / Q000175:diagnosis*; D001883:Borderline Personality Disorder / Q000175:diagnosis*; D002648:Child; D003937:Diagnosis, Differential; D039721:Diagnostic and Statistical Manual of Mental Disorders; D005260:Female; D006801:Humans; D008297:Male; D057566:Self Report; D055815:Young Adult
keywords: bipolar disorder; diagnosis; personality disorder