title: Internal consistency, intercriterion overlap and diagnostic efficiency of criteria sets for DSM-IV schizotypal, borderline, avoidant and obsessive-compulsive personality disorders.
abstract: OBJECTIVE
  To evaluate performance characteristics of DSM-IV Personality Disorders (PDs) criteria.
  
  
  METHODS
  Six hundred and sixty-eight adults recruited for the Collaborative Longitudinal Personality Disorders Study (CLPS) were assessed with diagnostic interviews.
  
  
  RESULTS
  Within-category inter-relatedness was evaluated by Cronbach's alpha and median intercriterion correlations (MIC). Cronbach's alpha ranged from 0.47 to 0.87 (median=0.71); seven of the 10 PDs had alphas greater than 0.70. Between-category criterion overlap was evaluated by "inter-category" intercriterion correlations between all PD pairs (ICMIC). ICMIC values (median=0.08) were lower than MIC values (median=0.23). Diagnostic efficiency statistics (sensitivity, specificity, positive predictive power and negative predictive power were calculated for schizotypal, borderline, avoidant and obsessive-compulsive PDs.
  
  
  CONCLUSIONS
  DSM-IV PD criteria sets have some convergent validity and discriminant validity: criteria for individual PDs correlate better with each other than with criteria for other PDs. Diagnostic efficiency statistics provide guidance regarding usefulness of criteria for inclusion or exclusion.
authors.affiliation: Collaborative Longitudinal Personality Study, Yale University School of Medicine, PO Box 208098, 301 Cedar Street, New Haven, CT 06520, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Grilo
authors.forename: T H
authors.initials: TH
authors.lastname: McGlashan
authors.forename: L C
authors.initials: LC
authors.lastname: Morey
authors.forename: J G
authors.initials: JG
authors.lastname: Gunderson
authors.forename: A E
authors.initials: AE
authors.lastname: Skodol
authors.forename: M T
authors.initials: MT
authors.lastname: Shea
authors.forename: C A
authors.initials: CA
authors.lastname: Sanislow
authors.forename: M C
authors.initials: MC
authors.lastname: Zanarini
authors.forename: D
authors.initials: D
authors.lastname: Bender
authors.forename: J M
authors.initials: JM
authors.lastname: Oldham
authors.forename: I
authors.initials: I
authors.lastname: Dyck
authors.forename: R L
authors.initials: RL
authors.lastname: Stout
mesh_terms: D000293:Adolescent; D000328:Adult; D001883:Borderline Personality Disorder / Q000175:diagnosis* / Q000523:psychology; D003193:Compulsive Personality Disorder / Q000175:diagnosis* / Q000523:psychology; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009511:New England / Q000453:epidemiology; D010554:Personality Disorders / Q000175:diagnosis* / Q000523:psychology; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data*; D011594:Psychometrics; D015203:Reproducibility of Results; D012569:Schizotypal Personality Disorder / Q000175:diagnosis* / Q000523:psychology