Psychometric properties of the World Health Organization WHOQOL‑AGE Scale in Singapore

Lee, Rachael Zhi Yi, Yang, Winson Fu Zun, Mahendran, Rathi, and Suarez, Lidia (2024) Psychometric properties of the World Health Organization WHOQOL‑AGE Scale in Singapore. European Journal of Ageing, 21. 10.

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WHOQOL-AGE is a promising quality of life (QOL) tool that has not been fully validated in Asia. The present study aimed to verify its factor structure and psychometric properties among community-dwelling older adults in Singapore. This study was cross-sectional and used data (N = 593) from the Community Health and Intergenerational study that interviewed older adults between 2018 and 2021. Confirmatory factor analysis (CFA) was used to examine the factor structure of the WHOQOL-AGE, and Cronbach’s alpha coefficients were employed to examine internal consistency. Spearman’s rho correlations coefficients between WHOQOL-AGE and other related scales (Satisfaction with Life and the Friendship) examined convergent validity. A Pearson’s correlation coefficient between WHOQOL-AGE and compassion scale examined discriminant validity. An independent t test was used to demonstrate known-groups validity, examining differences in QOL scores between individuals with and without chronic medical conditions. Findings supported a bifactor model with more satisfactory goodness-of-fit indices than the original two-factor model and the two-correlated factor model. WHOQOL-AGE showed adequate internal consistency (Cronbach’s alpha coefficients > .70). Good convergent validity was demonstrated by moderate-to-large correlations between WHOQOL-AGE and satisfaction with life (rs = .54) as well as social connectedness (rs = .33). Discriminant validity was shown by low correlations between WHOQOL-AGE and compassion (r = .19). Findings also indicated good known-groups validity (p < 0.01). The WHOQOL-AGE showed promising psychometric properties using an Asian convenience sample and can be useful in large-scale studies or busy clinical settings.

Item ID: 82513
Item Type: Article (Research - C1)
ISSN: 1613-9380
Keywords: Quality of life, WHOQOL-AGE, Asia, Psychometrics, Confirmatory factor analysis
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Date Deposited: 02 Apr 2024 23:19
FoR Codes: 52 PSYCHOLOGY > 5203 Clinical and health psychology > 520304 Health psychology @ 80%
52 PSYCHOLOGY > 5299 Other psychology > 529999 Other psychology not elsewhere classified @ 20%
SEO Codes: 20 HEALTH > 2005 Specific population health (excl. Indigenous health) > 200502 Health related to ageing @ 90%
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280121 Expanding knowledge in psychology @ 10%
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