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    Quality of life in indigenous and non-indigenous older adults: assessing the CASP-12 factor structure and identifying a brief CASP-3

    Access Status
    Fulltext not available
    Authors
    Towers, A.
    Yeung, Polly
    Stevenson, B.
    Stephens, C.
    Alpass, F.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Towers, A. and Yeung, P. and Stevenson, B. and Stephens, C. and Alpass, F. 2015. Quality of life in indigenous and non-indigenous older adults: assessing the CASP-12 factor structure and identifying a brief CASP-3. Quality of Life Research. 24 (1): pp. 193-203.
    Source Title
    Quality of Life Research
    DOI
    10.1007/s11136-014-0756-y
    ISSN
    0962-9343
    School
    Department of Social Work
    URI
    http://hdl.handle.net/20.500.11937/6355
    Collection
    • Curtin Research Publications
    Abstract

    Purpose: We assessed whether the original three-factor structure of the older adult CASP-12 Quality of Life (QOL) scale was stable for both indigenous and non-indigenous older adult populations in the same non-European country (i.e. New Zealand). Method: A total of 3076 New Zealanders aged 50–84 (Maori = 1,130; non-Maori sample = 1,946) completed a postal survey for the first data collection wave of the New Zealand Longitudinal Study of Ageing in 2010. The survey included the CASP-12, a chronic health conditions checklist, CES-D-10, de Jong Gierveld loneliness scale, and the WHOQOL single-item QOL indicator. Results: Exploratory factor analysis revealed that the CASP-12 responses resulted in a revised two-factor structure for both Maori and non-Maori we called the NZCASP-11, which included a new three-item global indicator of QOL (CASP-3) that consistently cross-loaded on both factors. Confirmatory factor analysis supported the NZCASP-11 factor structure over the original CASP-12 model, and further assessment validated both the utility of the NZCASP-11 as an indicator of QOL in New Zealand and illustrated the utility of the CASP-3 as a brief screen for global QOL. Conclusion: While CASP items coalesce to provide a robust QOL indicator of indigenous and non-indigenous QOL in a single-country setting, the actual factor structure underpinning this CASP indicator (i.e. the NZCASP-11) is not entirely reflective of that found in the United Kingdom. Furthermore, we revealed that three CASP items (i.e. the CASP-3) may reflect a stable brief indicator of QOL applicable for assessing QOL across cultures within a single setting.

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