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A Cross-Cultural Adaptation of the ICECAP-O: Test–Retest Reliability and Item Relevance in Swedish 70-Year-Olds

Author

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  • Helena Hörder

    (Neuropsychiatric Epidemiology Unit, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Centre for Ageing and Health—Agecap, University of Gothenburg, Mölndal 43141, Sweden)

  • Susanne Gustafsson

    (Division of Occupational and Physical Therapy, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Centre for Ageing and Health—Agecap, University of Gothenburg, Gothenburg 40530, Sweden)

  • Therese Rydberg

    (Neuropsychiatric Epidemiology Unit, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Centre for Ageing and Health—Agecap, University of Gothenburg, Mölndal 43141, Sweden)

  • Ingmar Skoog

    (Neuropsychiatric Epidemiology Unit, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Centre for Ageing and Health—Agecap, University of Gothenburg, Mölndal 43141, Sweden)

  • Margda Waern

    (Neuropsychiatric Epidemiology Unit, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Centre for Ageing and Health—Agecap, University of Gothenburg, Mölndal 43141, Sweden)

Abstract

Background: While there is a plethora of Quality of Life (QoL) measures, the Investigating Choice Experiments for the Preferences of Older People—CAPability index (ICECAP-O) is one of the few that taps into the concept of capability, i.e., opportunities to 'do' and 'be' the things that one deems important in life. We aimed to examine test–retest reliability of the ICECAP-O in a Swedish context and to study item relevance. Methods: Thirty-nine 70-year-olds who took part in a population-based health study completed the Swedish version of the ICECAP-O on two occasions. We analyzed the test–retest reliability for the index and for the individual items. Participants also rated the relevance of each item on a visual analogue scale (0–100). Results: Test–retest reliability for the index score was in good agreement with an ICC of 0.80 (95% CI 0.62–0.90). However, Kappa was low for each item and ranged from 0.18 (control) to 0.41 (role). For attachment, we found a systematic disagreement with lower ratings at the second test occasion. Participants gave their highest relevance rating to attachment and lowest to enjoyment. Conclusion: The Swedish version of the ICECAP-O had good test–retest agreement, similar to that observed for the English version. Item level agreement was problematic, however, highlighting a need for future research.

Suggested Citation

  • Helena Hörder & Susanne Gustafsson & Therese Rydberg & Ingmar Skoog & Margda Waern, 2016. "A Cross-Cultural Adaptation of the ICECAP-O: Test–Retest Reliability and Item Relevance in Swedish 70-Year-Olds," Societies, MDPI, vol. 6(4), pages 1-6, September.
    • Handle: RePEc:gam:jsoctx:v:6:y:2016:i:4:p:30-:d:79614
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    References listed on IDEAS

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    1. Al-Janabi, Hareth & Keeley, Thomas & Mitchell, Paul & Coast, Joanna, 2013. "Can capabilities be self-reported? A think aloud study," Social Science & Medicine, Elsevier, vol. 87(C), pages 116-122.
    2. Flynn, Terry N. & Louviere, Jordan J. & Peters, Tim J. & Coast, Joanna, 2007. "Best-worst scaling: What it can do for health care research and how to do it," Journal of Health Economics, Elsevier, vol. 26(1), pages 171-189, January.
    3. Sakiko Fukuda-Parr, 2003. "The Human Development Paradigm: Operationalizing Sen'S Ideas On Capabilities," Feminist Economics, Taylor & Francis Journals, vol. 9(2-3), pages 301-317.
    4. Coast, Joanna & Flynn, Terry N. & Natarajan, Lucy & Sproston, Kerry & Lewis, Jane & Louviere, Jordan J. & Peters, Tim J., 2008. "Valuing the ICECAP capability index for older people," Social Science & Medicine, Elsevier, vol. 67(5), pages 874-882, September.
    5. Leah Couzner & Maria Crotty & Richard Norman & Julie Ratcliffe, 2013. "A Comparison of the EQ-5D-3L and ICECAP-O in an Older Post-Acute Patient Population Relative to the General Population," Applied Health Economics and Health Policy, Springer, vol. 11(4), pages 415-425, August.
    6. Grewal, Ini & Lewis, Jane & Flynn, Terry & Brown, Jackie & Bond, John & Coast, Joanna, 2006. "Developing attributes for a generic quality of life measure for older people: Preferences or capabilities?," Social Science & Medicine, Elsevier, vol. 62(8), pages 1891-1901, April.
    7. Hareth Al‐Janabi & Terry N. Flynn & Tim J. Peters & Stirling Bryan & Joanna Coast, 2015. "Test–Retest Reliability of Capability Measurement in the UK General Population," Health Economics, John Wiley & Sons, Ltd., vol. 24(5), pages 625-630, May.
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