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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Modified WHODAS-II provides valid measure of global disability but filter items increased skewness
Journal of Clinical Epidemiology, Volume 61, No. 11, Year 2008
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Description
Objective: The WHODAS-II was substantially modified for use in the World Mental Health Surveys. This article considers psychometric properties and implications of filter items used to reduce respondent burden of the modified WHODAS-II. Study Design and Setting: Seventeen surveys in 16 countries administered a modified WHODAS-II to population samples (N = 38,934 adults). Modifications included introducing filter questions for four subscales and substituting questions on the number of days activity was limited for the Life Activities domain. We evaluated distributional properties, reliability, and validity of the modified WHODAS-II. Results: Most respondents (77%-99%) had zero scores on filtered subscales. Lower bound estimates of internal consistency (alpha) for the filtered subscales were typically in the 0.70s, but were higher for the Global scale. Loadings of subscale scores on a Global Disability factor were moderate to high. Correlations with the Sheehan Disability Scale were modest but consistently positive, while correlations with SF-12 Physical Component Summary were considerably higher. Cross-national variability in disability scores was observed, but was not readily explainable. Conclusions: Internal consistency and validity of the modified WHODAS-II was generally supported, but use of filter questions impaired measurement properties. Group differences in modified WHODAS-II disability scores may be compared within, but not necessarily across, countries. © 2008 Elsevier Inc. All rights reserved.
Authors & Co-Authors
von Korff, Michael R.
United States, Seattle
Group Health Cooperative
Crane, Paul K.
United States, Seattle
Harborview Medical Center
Alonso Caballero, J. L.
Spain, Barcelona
Institut Municipal D'investigacio Medica
Vilagut, Gemma
Spain, Barcelona
Institut Municipal D'investigacio Medica
Angermeyer, Matthias Claus
Germany, Leipzig
Universität Leipzig
Bruffaerts, Ronny
Belgium, Leuven
Ku Leuven– University Hospital Leuven
de Girolamo, Giovanni
Italy, Bologna
Azienda Usl Di Bologna
Gureje, Oye
Netherlands, Utrecht
Trimbos Institute, Netherlands Institute of Mental Health and Addiction
de Graaf, Ron
Nigeria, Ibadan
University College Hospital, Ibadan
Huang, Yueqin
China, Beijing
Peking University Sixth Hospital
Iwata, Noboru
Japan, Hiroshima
Hiroshima International University
Karam, Elie Georges
Lebanon, Beirut
Institute for Development, Research, Advocacy and Applied Care, Beirut
Kovess - Masfety, Viviane
Unknown Affiliation
Lara, C.
Mexico, Puebla
Benemérita Universidad Autónoma de Puebla
Levinson, Daphna
Israel, Jerusalem
Ministry of Health
Posada-Villa, J. A.
Colombia, Bogota
Saldarriaga Concha Foundation
Scott, Kate Margaret
New Zealand, Wellington
University of Otago, Wellington
Ormel, Johan Hans
Netherlands, Groningen
Universitair Medisch Centrum Groningen
Statistics
Citations: 146
Authors: 18
Affiliations: 16
Identifiers
Doi:
10.1016/j.jclinepi.2007.12.009
ISSN:
08954356
Research Areas
Disability
Mental Health
Study Design
Cross Sectional Study