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

Author

Listed:
  • Rachael Zhi Yi Lee

    (James Cook University
    Clarity Singapore Limited)

  • Winson Fu Zun Yang

    (Texas Tech University
    Massachusetts General Hospital, Harvard Medical School
    Massachusetts General Hospital, Harvard Medical School)

  • Rathi Mahendran

    (National University of Singapore
    Mind Care Clinic @ SBF)

  • Lidia Suárez

    (James Cook University)

Abstract

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

Suggested Citation

  • Rachael Zhi Yi Lee & Winson Fu Zun Yang & Rathi Mahendran & Lidia Suárez, 2024. "Psychometric properties of the World Health Organization WHOQOL-AGE Scale in Singapore," European Journal of Ageing, Springer, vol. 21(1), pages 1-11, December.
    • Handle: RePEc:spr:eujoag:v:21:y:2024:i:1:d:10.1007_s10433-024-00803-3
    DOI: 10.1007/s10433-024-00803-3
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    References listed on IDEAS

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