Assessment of difficulties in everyday life - validation of the Swedish self-administered version of World Health Organization Disability Assessment Schedule 2.0 in a psychiatric population

The overall aim is to validate the Swedish WHODAS 2.0 self-administered version in psychiatric care by examining its psychometric qualities in different psychiatric populations. More specifically we want to examine:

• The factorial structure compared to the English version;
• The internal consistency in different patient populations;
• The test-retest reliability;
• Alternate forms reliability between the self-administered and interviewer administered versions;
• Convergent validity to other measures of function such as Sheehan Disability Scale or GAF; and,
• Discriminative validity between groups of people with different health conditions.