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Quality of Life and Health-Related Quality of Life over 1 Year in Older Women: Monitoring Stability and Reliability of Measurement

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  • Yvonne Learmonth
  • Elizabeth Alwick
  • Edward McAuley
  • Robert Motl

Abstract

Assessing quality of life (QOL) and health-related quality of life (HRQOL) in older adults is important. Yet, limited research is available on the stability of these constructs and the psychometric properties of QOL [e.g., Satisfaction with Life Scale (SWLS)] and HRQOL [e.g., Short-Form 12 Health Survey (SF-12)] measures in this population. Such knowledge is important for designing and interpreting interventions. We examined stability of QOL (SWLS) and HRQOL (SF-12) and their test–retest reliability, measurement error, and interpretability over 1 year in older Black and White women (n = 230). Stability and reliability were ascertained through paired sample t tests and intraclass correlation coefficients (ICCs). Standard error of measurement and coefficient of variation assessed measurement error. Smallest detectable change estimated score interpretability. QOL and HRQOL remained stable; ICC values indicated moderate reliability for the SWLS and SF-12 (SWLS = 0.73, SF-12 Physical Composite Summary = 0.69, SF-12 Mental Composite Summary = 0.58). Measurement error and interpretability estimates were similar for both the SWLS and SF-12. Interpretability estimates indicated a change in score of around 33 % may represent an important change. We provide novel data for selecting and interpreting QOL and HRQOL measures contributing to a better understanding of intervention efficacy. Copyright Springer Science+Business Media Dordrecht 2015

Suggested Citation

  • Yvonne Learmonth & Elizabeth Alwick & Edward McAuley & Robert Motl, 2015. "Quality of Life and Health-Related Quality of Life over 1 Year in Older Women: Monitoring Stability and Reliability of Measurement," Social Indicators Research: An International and Interdisciplinary Journal for Quality-of-Life Measurement, Springer, vol. 123(1), pages 267-279, August.
    • Handle: RePEc:spr:soinre:v:123:y:2015:i:1:p:267-279
    DOI: 10.1007/s11205-014-0729-0
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    References listed on IDEAS

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    1. Alan D. Lopez & Colin D. Mathers & Majid Ezzati & Dean T. Jamison & Christopher J. L. Murray, 2006. "Global Burden of Disease and Risk Factors," World Bank Publications - Books, The World Bank Group, number 7039.
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    Cited by:

    1. Gawlik, Remigiusz, 2016. "Encompassing the Work-Life Balance into Early Career Decision-Making of Future Employees Through the Analytic Hierarchy Process," MPRA Paper 80260, University Library of Munich, Germany.

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