title: Defining disability in psychosis: performance of the diagnostic interview for psychosis-disability module (DIP-DIS) in the Australian National Survey of Psychotic Disorders.
abstract: OBJECTIVE
  We aimed to use data from the Australian Survey of Mental Health and Wellbeing to examine the psychometric properties of the Diagnostic Interview for Psychosis-Disability Module (DIP-DIS). The DIP-DIS is a semi-structured questionnaire specially designed to assess disability associated with psychotic disorders.
  
  
  METHODS
  The psychometric properties of the instrument were determined by examining its inter-rater reliability, internal structure, as well as its criterion and discriminant validities.
  
  
  RESULTS
  Analysis shows: (1) that it can be rated reliably by trained interviewers, (2) that the items are complementary but tap a number of different domains, (3) that four factors account for over 66% of the variance, and (4) that it is sensitive to differing clinical populations with expected differences in level of disability. Ratings on the DIP-DIS bore significant relationships with a criterion measure of quality of life.
  
  
  CONCLUSIONS
  The DIP-DIS has encouraging psychometric properties for cross-sectional assessment of disability and may be useful in future studies of disablement associated with psychosis. Future work should examine its sensitivity to change.
authors: Department of Psychiatry, University of Melbourne, Australia.
authors: O
authors: O
authors: Gureje
authors: H
authors: H
authors: Herrman
authors: C
authors: C
authors: Harvey
authors: T
authors: T
authors: Trauer
authors: A
authors: A
authors: Jablensky
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001315:Australia; D004185:Disability Evaluation; D006801:Humans; D011618:Psychotic Disorders / Q000175:diagnosis*; D011795:Surveys and Questionnaires