Instrument reference
WHO Disability Assessment Schedule 2.0 (WHODAS 2.0)
Verification required Verification required
- Construct measured
- Health-related functioning and disability across life domains, linked to the ICF framework.
- Category
- Sleep and functioning
- Intended population
- Adults across health conditions; several versions (including 36- and 12-item forms) and administration modes.
- Number of items
- Versions differ; see the WHO manual.
- Administration format
- Interviewer, self or proxy administration, depending on version.
- Scoring approach
- Simple and complex scoring methods are described in the WHO manual. This catalogue does not reproduce items or scoring tables.
- Language and population validation
- Multiple WHO language versions; check validation for the intended population.
Reliability and validity evidence
- The WHO manual describes development across multiple countries and its psychometric work. — Üstün et al. (2010)
Interpretation cautions
- Functioning measures complement, but do not replace, symptom and diagnostic assessment.
Copyright and licence
Verification required
WHO instrument. Reuse and translation terms were not confirmed for this catalogue; consult the WHO page before use.
Reuse terms could not be confirmed from an official source for this catalogue. Only factual metadata is published. Check with the rights holder before any use.
Official source
WHO — WHODAS 2.0 (opens in a new tab)
Rights and evidence last verified: 2026-10-19.