title: Multiple personality disorder among female inpatients in a state hospital.
abstract: OBJECTIVE
  Professional skepticism and concerns regarding diagnostic reliability hinder research in dissociative disorders and multiple personality disorder. The reported frequency of multiple personality disorder in different psychiatric settings ranges from 2.4% to 35%. The authors conducted a replication study of multiple personality disorder ascertainment in women admitted to a state hospital over a 5.5-month period.
  
  
  METHODS
  Responses to the Dissociative Experiences Scale and to the Dissociative Disorders Interview Schedule were obtained, along with data on length of stay, county of admission referral, admission commitment status, and discharge diagnoses, for 176 female inpatients in a state hospital. Of 421 women representing 483 consecutive admissions, 121 were discharged before they could be assessed for study, 64 were excluded, 60 declined to participate, 176 enrolled in the study, and 175 completed the research procedures.
  
  
  RESULTS
  Twenty-one women (12%) met criteria for multiple personality disorder based on the Dissociative Disorders Interview Schedule; these women were significantly younger than the women without multiple personality disorder. Scores on the Dissociative Experiences Scale of the women with multiple personality disorder (mean = 59.5, SD = 19.6) were significantly higher than the scores of women without multiple personality disorder (mean = 22.5, SD = 20.1), but considerable overlap occurred. There was no significant difference between groups in length of stay or admission status.
  
  
  CONCLUSIONS
  The authors conclude that 1) the wide variability in multiple personality disorder detection is partially due to site-specific ascertainment biases and 2) despite its apparent usefulness for screening purposes, the Dissociative Experiences Scale requires more comprehensive evaluation before it can be applied broadly.
authors.affiliation: Bowman Gray School of Medicine of Wake Forest University, Department of Psychiatry and Behavioral Medicine, Winston-Salem, NC 27157-1087, USA.
authors.forename: T T
authors.initials: TT
authors.lastname: Latz
authors.forename: S I
authors.initials: SI
authors.lastname: Kramer
authors.forename: D L
authors.initials: DL
authors.lastname: Hughes
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D009105:Dissociative Identity Disorder / Q000175:diagnosis / Q000453:epidemiology*; D005260:Female; D005555:Forensic Psychiatry; D006760:Hospitalization; D006783:Hospitals, State / Q000706:statistics & numerical data*; D006801:Humans; D007902:Length of Stay; D008875:Middle Aged; D009657:North Carolina / Q000453:epidemiology; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D012017:Referral and Consultation; D015203:Reproducibility of Results; D012737:Sex Factors