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How Significant Are “High†Correlations Between EQ-5D Value Sets?

Author

Listed:
  • Franz Ombler

    (Department of Computer Science, University of Otago, Dunedin, New Zealand)

  • Michael Albert

    (Department of Computer Science, University of Otago, Dunedin, New Zealand)

  • Paul Hansen

    (Department of Economics, University of Otago, Dunedin, New Zealand)

Abstract

The calculation of quality-adjusted life years, as used for cost–utility analysis, depends on the availability of value sets representing people’s preferences with respect to health-related quality of life (HRQoL). A value set consists of HRQoL index values for all health states representable by the particular descriptive system used, of which the EQ-5D (EuroQoL, 5 Dimensions) is by far the most widely used. High correlation coefficients for EQ-5D value sets derived from different samples—across countries and/or using different valuation techniques—are conventionally interpreted as evidence that the people in the respective samples have similar HRQoL preferences. However, EQ-5D value sets—for both versions of the system (EQ-5D-3L and EQ-5D-5L)—contain many inherent rankings of health state values by design . By calculating correlation coefficients for value sets created from random data, we demonstrate that “high†coefficients are artifacts of these inherent rankings, such as median Pearson’s r = 0.783 for the EQ-5D-3L and 0.850 for the EQ-5D-5L instead of zero. Therefore, high correlation coefficients do not necessarily constitute evidence of meaningful associations in terms of similar HRQoL preferences. After calculating significance levels based on our simulations—available as an online resource for other researchers—we find that many high coefficients are not as significant as conventionally interpreted, whereas other coefficients are not significant. These “high†but insignificant correlations are in fact spurious.

Suggested Citation

  • Franz Ombler & Michael Albert & Paul Hansen, 2018. "How Significant Are “High†Correlations Between EQ-5D Value Sets?," Medical Decision Making, , vol. 38(6), pages 635-645, August.
    • Handle: RePEc:sae:medema:v:38:y:2018:i:6:p:635-645
    DOI: 10.1177/0272989X18778295
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    References listed on IDEAS

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    1. Nick Bansback & Aki Tsuchiya & John Brazier & Aslam Anis, 2012. "Canadian Valuation of EQ-5D Health States: Preliminary Value Set and Considerations for Future Valuation Studies," PLOS ONE, Public Library of Science, vol. 7(2), pages 1-11, February.
    2. Irina Cleemput, 2010. "A social preference valuations set for EQ-5D health states in Flanders, Belgium," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 11(2), pages 205-213, April.
    3. Nancy Devlin & Paul Krabbe, 2013. "The development of new research methods for the valuation of EQ-5D-5L," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 14(1), pages 1-3, July.
    4. Nancy J. Devlin & Paul Hansen & Paul Kind & Alan Williams, 2003. "Logical inconsistencies in survey respondents' health state valuations ‐ a methodological challenge for estimating social tariffs," Health Economics, John Wiley & Sons, Ltd., vol. 12(7), pages 529-544, July.
    5. David Parkin & Nigel Rice & Nancy Devlin, 2010. "Statistical Analysis of EQ-5D Profiles: Does the Use of Value Sets Bias Inference?," Medical Decision Making, , vol. 30(5), pages 556-565, September.
    6. Leida M. Lamers & Peep F. M. Stalmeier & Paul F. M. Krabbe & Jan J. V. Busschbach, 2006. "Inconsistencies in TTO and VAS Values for EQ-5D Health States," Medical Decision Making, , vol. 26(2), pages 173-181, March.
    7. Kim Rand-Hendriksen & Liv Ariane Augestad & Fredrik A. Dahl & Ivar Sønbø Kristiansen & Knut Stavem, 2012. "A Shortcut to Mean-Based Time Tradeoff Tariffs for the EQ-5D?," Medical Decision Making, , vol. 32(4), pages 569-577, July.
    8. Dolan, Paul & Kind, Paul, 1996. "Inconsistency and health state valuations," Social Science & Medicine, Elsevier, vol. 42(4), pages 609-615, February.
    9. Badia, Xavier & Roset, Monserrat & Herdman, Michael, 1999. "Inconsistent responses in three preference-elicitation methods for health states," Social Science & Medicine, Elsevier, vol. 49(7), pages 943-950, October.
    10. Feng Xie & Kathryn Gaebel & Kuhan Perampaladas & Brett Doble & Eleanor Pullenayegum, 2014. "Comparing EQ-5D Valuation Studies," Medical Decision Making, , vol. 34(1), pages 8-20, January.
    11. Nan Luo & Jeffrey A. Johnson & James W. Shaw & Stephen Joel Coons, 2007. "A Comparison of EQ-5D Index Scores Derived from the US and UK Population-Based Scoring Functions," Medical Decision Making, , vol. 27(3), pages 321-326, May.
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