Programme : Presentation on 25
September 2003Design and Implementation of Disability Surveys using the ICF framework
Text version of a Powerpoint Presentation
Presented by WHO
Slide 1
UNESCAP Workshop on Improving Disability Data for Policy Use, Bangkok,
23 – 26. September 2003
Design and Implementation of Disability Surveys using the ICF framework
Bedirhan stn
Somnath Chatterji
Classification, Assessment, Surveys & Terminology Group
World Health Organization
www.who.int/classification/icf
2
Disability in ICF
- Overall term for functioning decrements
Combination of:
- Impairments
- Activity limitations & Participation restrictions
- Multi-dimensional
- Multiple domains
- Can either be capacity or performance
- Linked with health which is shares same domains and dimensions
3
How to design a Disability Survey Questionnaire ?
OPTIONS
- Are you disabled ?
- Do you have:
- Blindness ?
- Deafness ?
- mental retardation ?
- …
- Can you / Do you have difficulties
- See a person across the road (10 meters) ?
- Walk …
- Work …
- Participate in community activities …
4
How to design a Disability Survey?
- Sampling
- Questions
- Screening : 4- 5 short questions
- Full set : 8 –30 questions
- Additional Information:
- Health condition
- Assistance needed
- Environmental Factors
- Personal Factors
- Response Scale
- Five point scale linked to ICF coding
5
Disability Surveys
Screening Questions
- Sensitivity
- ability to pick up positive cases
- Specificity
- ability to differentiate true from false cases
- Reliability
- Stability of the response
- Validity
- Ability to report true cases
- Cross-Population Comparability
- Adjust for Self-Report biases by known covariates
6
ICF based Disability Survey approach
- Application of WHO-DAS Short version (12 question) in general population
- Application of remaining 14 question in sub-set
- Branching structure for questions on impairments and environmental factors
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