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ESCAP/WHO Pilot Study Overview Wei Liu Statistics Division, ESCAP [email protected] PowerPoint PPT Presentation


ESCAP/WHO Pilot Study Overview Wei Liu Statistics Division, ESCAP [email protected] 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 [email protected]

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ESCAP/WHO Pilot Study Overview

Wei Liu

Statistics Division, ESCAP

[email protected]

Sixth Meeting of the Washington Group on Disability Statistics, Kampala, Oct 10-13, 2006


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

Outline


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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


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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)


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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)


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Sample Sizes


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Sample Summary: Age Structure


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Pilot Study Packets

  • Study Instructions

  • Questionnaire

    • Version A

    • Version B

  • Cognitive Interview Schedule


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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


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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


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Study 1: Sensitivity and Specificity of WG Q’s


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Study 1 (cont.)


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Study 2: Kappa Statistics for Test-retest Reliability


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Study 2 (cont.)


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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


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Identifying “Core Domains”

  • ESCAP/WHO 4th Workshop on Improvement of Disability Statistics and Measurement (Bangkok, June, 2006)

  • Factor analysis research


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Factor Loadings


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Factor Analysis

Life Activities

Hearing

Self Care

Participation

Mobility

Vision

4th Bangkok Workshop Recommendation

Life Activities

Hearing

Self Care

Communication

Mobility

Vision

Domain Selections


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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


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Thank You!

www.unescap.org/stat/


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