National Changhua University of Education Institutional Repository : Item 987654321/14886
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题名: Psychometric Evaluation of the WHOQOL-BREF in Community-dwelling Older People in Taiwan Using Rasch Analysis
作者: Liang, Wen-Miin;Chang, Chih-Hung;Yeh, Yi-Chun;Shy, Haw-Yaw;Chen, Hung-Wei;Lin, Mau-Roung
贡献者: 數學系
关键词: Health-related quality of life;Item response theory;Older people;Rasch model;WHOQOL-BREF
日期: 2009
上传时间: 2012-12-10T02:44:42Z
出版者: SpringrLink
摘要: Objective To examine the psychometric characteristics of
the brief version of the World Health Organization Quality
of Life (WHOQOL-BREF) questionnaire in rural-community-
dwelling older people in Taiwan using Rasch
analysis.
Methods This is a cross-sectional study. A total of 1200
subjects aged C65 years were recruited to complete the
26-item WHOQOL-BREF. Scale dimensionality, item
difficulty, scale reliability and separation, item targeting,
item-person map, and differential item functioning (DIF)
were examined.
Results The four WHOQOL-BREF scales (physical
capacity, psychological well-being, social relationships,
and environment) were found to be unidimensional and
reliable. The item–person map for each domain indicated
that the spread of the item thresholds sufficiently covered
the latent trait continuum being measured. However, gaps
in content coverage were identified in the social domain.
Analyses of the DIF revealed that one psychological item
(body image) exhibited DIF across the two age groups
(old–old vs. young–old) and that two social items (sexual
activity and friends’ support) displayed DIF across genders
and the two age groups.
Conclusions Rasch analysis is a comprehensive method
of psychometric evaluation of the WHOQOL-BREF and
identifies areas for improvements. Three items displaying
age-related DIF (body image, sexual activity, and friends’
support) may potentially cause biased health-related QOL
assessments, and their impacts on scores should be carefully
examined.
關聯: Quality of Life Research, 18(5): 605-618
显示于类别:[數學系] 期刊論文

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