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ESCAP/WHO Pilot Study Overview Wei Liu Statistics Division, ESCAP liuw@un

ESCAP/WHO Pilot Study Overview Wei Liu Statistics Division, ESCAP liuw@un.org Sixth Meeting of the Washington Group on Disability Statistics, Kampala, Oct 10-13, 2006. 1. Objective 2. Background and methodology 3. Questions tested 4. Analysis and results 5. Moving forward. Outline .

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ESCAP/WHO Pilot Study Overview Wei Liu Statistics Division, ESCAP liuw@un

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  1. ESCAP/WHO Pilot Study Overview Wei Liu Statistics Division, ESCAP liuw@un.org Sixth Meeting of the Washington Group on Disability Statistics, Kampala, Oct 10-13, 2006

  2. 1.Objective2. Background and methodology3. Questions tested4. Analysis and results5. Moving forward Outline

  3. Objectives • Comparing the Washington Group 6-question “short set” with a WHO “long set” of questions • Studying the relative importance of different domains • Considering differences in underlying concepts and phrasings of questions

  4. Background Pilot countries: Fiji, Indonesia, India, Mongolia, Philippines Test Design: Study One: Testing sensitivity and specificity Study Two: Test-Retest Reliability Study Three: Linguistic Evaluation & Cognitive interviewing Other Partners: Australian Bureau of Statistics (ABS)

  5. Sample Selection India: Meerut District, Uttar Pradesh State Indonesia: Central Jakarta Mongolia: Ulaanbaatar Philippines: A selection of urban and rural geographic “clusters” Fiji: 2 rural and 8 urban enumeration areas in Central Division (capital city & surrounding areas)

  6. Sample Sizes

  7. Sample Summary: Age Structure

  8. Pilot Study Packets • Study Instructions • Questionnaire • Version A • Version B • Cognitive Interview Schedule

  9. Support Materials • Translation • Guidelines • List of key terms • Linguistic evaluation form • Interview Guidelines & Q-by-Q specifications • Disability Statistics Training Manual - Draft • Quality assurance standards & guidelines • Data entry program

  10. Questions Tested Question set 1: Washington Group’s general disability measures, 6 Qs Question set 2: -World Health Survey body structure/functions domains, 17 Qs; -WHO Disability Assessment Schedule II (WHO DAS II), activity and participation domains, 36 Qs; Australian Bureau of Statistics, need-for-assistance domains, 4 Qs http://www.unescap.org/stat/meet/widsm4/disabilty_questionnaire_Ver.A.pdf

  11. Study 1: Sensitivity and Specificity of WG Q’s

  12. Study 1 (cont.)

  13. Study 2: Kappa Statistics for Test-retest Reliability

  14. Study 2 (cont.)

  15. Study 3: Cognitive Debriefing • Most questions are understood well • 95% of the respondents had no difficulties responding to questions • Minor difficulties with questions on: • Mental disability (i.e. cognition, anxiety, getting along with people, etc.) • Need-for-assistance questions • W6 communication question • Translation

  16. Identifying “Core Domains” • ESCAP/WHO 4th Workshop on Improvement of Disability Statistics and Measurement (Bangkok, June, 2006) • Factor analysis research

  17. Factor Loadings

  18. Factor Analysis Life Activities Hearing Self Care Participation Mobility Vision 4th Bangkok Workshop Recommendation Life Activities Hearing Self Care Communication Mobility Vision Domain Selections

  19. Moving Forward • Further analysis of “core” domains • To select/reconsider the phrasings of the questions for the selected domains • Follow-up pilot studies for census recommendations and for an “extended” question set for use in surveys • Regional training and advisory missions

  20. Thank You! www.unescap.org/stat/

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