Psychometric properties of the World Health Organization WHOQOL-BREF quality of life assessment in Singapore

Suárez, Lidia, Tay, Benjamin, and Abdullah, Fazlin (2018) Psychometric properties of the World Health Organization WHOQOL-BREF quality of life assessment in Singapore. Quality of Life Research, 27 (11). pp. 2945-2952.

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Purpose: This study validated the World Health Organization Quality of Life (WHOQOL-BREF) questionnaire with 3,400 respondents living in Singapore.

Methods: The ethnic composition was 76.1% Chinese, 12.3% Malay, 9.6% Indian, and 2% Others. The sample included adults with disabilities (28.9%), adults recovering from mental health issues (14%), and adults from the general population (57.1%). Questionnaires about health-related conditions, the effects of disability on everyday functioning (WHODAS 2.0), the WHOQOL-BREF, and add-on modules of QOL of people with disabilities (WHOQOL-DIS) and QOL of elders (WHOQOL-OLD) were administrated.

Results: Confirmatory factor analysis supported a construct of QOL made of four domains, revealing good construct validity. The four domains predicted overall QOL and health satisfaction. Good internal consistency was evidenced by high alpha coefficients for the physical (.79), psychological (.82), social relationships (.81), and environment (.83) domains. Convergent validity was shown by moderate correlations between the different questionnaires measuring QOL (WHOQOL-BREF, WHOQOL-DIS, and WHOQOL-OLD), and discriminant validity by a lower correlation between the WHOQOL-BREF and disability. Convergent and divergent validity were also indicated by higher correlations between similar constructs across the different measures, and lower correlations between dissimilar constructs across measures, respectively. Concurrent validity was supported by showing that individuals with chronic medical conditions had lower QOL than individuals without chronic medical conditions.

Conclusions: The results showed that the WHOQOL-BREF has sound psychometric properties and can be used to measure QOL in Singapore.

Item ID: 54761
Item Type: Article (Research - C1)
ISSN: 1573-2649
Keywords: quality of life, WHOQOL-BREF, validation, Singapore, confirmatory factor analysis, psychometrics
Copyright Information: Copyright © Springer Nature Switzerland AG 2018
Funders: National Council of Social Service, Singapore
Date Deposited: 27 Jul 2018 04:24
FoR Codes: 52 PSYCHOLOGY > 5201 Applied and developmental psychology > 520108 Testing, assessment and psychometrics @ 40%
42 HEALTH SCIENCES > 4204 Midwifery > 420403 Psychosocial aspects of childbirth and perinatal mental health @ 30%
42 HEALTH SCIENCES > 4203 Health services and systems > 420313 Mental health services @ 30%
SEO Codes: 92 HEALTH > 9202 Health and Support Services > 920203 Diagnostic Methods @ 60%
92 HEALTH > 9202 Health and Support Services > 920204 Evaluation of Health Outcomes @ 30%
97 EXPANDING KNOWLEDGE > 970117 Expanding Knowledge in Psychology and Cognitive Sciences @ 10%
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