DSM-IV AND ICD-10 PERSONALITY-DISORDERS - A COMPARISON OF A SELF-REPORT QUESTIONNAIRE (DIP-Q) WITH A STRUCTURED INTERVIEW

Objective: Diagnosing personality disorders according to structured ex pert interviews is time-consuming and costly. For epidemiological stud ies, self-report instruments have several advantages. The DSM-IV and I CD-10 personality questionnaire (DIP-Q) is a self-report questionnaire constructed to identify personality disorder according to DSM-IV and ICD-10. Method: The DIP-Q is validated vs a structured expert intervie w in a clinical sample of 138 individuals. In addition, prevalence rat es yielded by DIP-Q among 136 healthy volunteers are assessed and comp ared to expected prevalence. Results: For DSM-IV the agreement for any personality disorder as measured by Cohen's Kappa was 0.61 and 0.56 f or ICD-IO. Overall sensitivity for any personality disorder was for DS M-IV 0.84 and for ICD-IO 0.85. However, specificity was lower: 0.77 an d 0.70, respectively. When dimensional scores between self-report and interview for each personality disorder were compared, the intraclass correlation for the DSM-IV entities was 0.37-0.87 and for the ICD-10 e ntities 0.33-0.73. Among healthy volunteers the base rate of personali ty disorders was found to be 14%. Conclusion: DIP-Q can be used as a s creening instrument for personality disorders according to DSM-IV and ICD-IO. Seif-report questionnaires such as DIP-Q will probably play an increasingly important role in future epidemiological studies. (C) 19 98 Elsevier, Paris.