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Mapping the Modified Rankin Scale (mRS) Measurement into the Generic EuroQol (EQ-5D) Health Outcome

Author

Listed:
  • Oliver Rivero-Arias

    (Health Economics Research Centre, Department of Public Health, University of Oxford, UK, oliver.rivero@dphpc.ox.ac.uk)

  • Melissa Ouellet

    (Health Economics Research Centre, Department of Public Health, University of Oxford, UK)

  • Alastair Gray

    (Health Economics Research Centre, Department of Public Health, University of Oxford, UK)

  • Jane Wolstenholme

    (Health Economics Research Centre, Department of Public Health, University of Oxford, UK)

  • Peter M. Rothwell

    (Stroke Prevention Research Unit, University Department of Clinical Neurology, John Radcliffe Hospital, Oxford, UK)

  • Ramon Luengo-Fernandez

    (Health Economics Research Centre, Department of Public Health, University of Oxford, UK)

Abstract

Background. Mapping disease-specific instruments into generic health outcomes or utility values is an expanding field of interest in health economics. This article constructs an algorithm to translate the modified Rankin scale (mRS) into EQ-5D utility values. Methods. mRS and EQ-5D information was derived from stroke or transient ischemic attack (TIA) patients identified as part of the Oxford Vascular study (OXVASC). Ordinary least squares (OLS) regression was used to predict UK EQ-5D tariffs from mRS scores. An alternative method, using multinomial logistic regression with a Monte Carlo simulation approach (MLogit) to predict responses to each EQ-5D question, was also explored. The performance of the models was compared according to the magnitude of their predicted-to-actual mean EQ-5D tariff difference, their mean absolute and mean squared errors (MAE and MSE), and associated 95% confidence intervals (CIs). Out-of-sample validation was carried out in a subset of coronary disease and peripheral vascular disease (PVD) patients also identified as part of OXVASC but not used in the original estimation. Results. The OLS and MLogit yielded similar MAE and MSE in the internal and external validation data sets. Both approaches also underestimated the uncertainty around the actual mean EQ-5D tariff producing tighter 95% CIs in both data sets. Conclusions. The choice of algorithm will be dependent on the study aim. Individuals outside the United Kingdom may find it more useful to use the multinomial results, which can be used with different country-specific tariff valuations. However, these algorithms should not replace prospective collection of utility data.

Suggested Citation

  • Oliver Rivero-Arias & Melissa Ouellet & Alastair Gray & Jane Wolstenholme & Peter M. Rothwell & Ramon Luengo-Fernandez, 2010. "Mapping the Modified Rankin Scale (mRS) Measurement into the Generic EuroQol (EQ-5D) Health Outcome," Medical Decision Making, , vol. 30(3), pages 341-354, May.
  • Handle: RePEc:sae:medema:v:30:y:2010:i:3:p:341-354
    DOI: 10.1177/0272989X09349961
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    References listed on IDEAS

    as
    1. Rowen, D & Brazier, J & Roberts, J, 2008. "Mapping SF-36 onto the EQ-5D index: how reliable is the relationship?," MPRA Paper 29831, University Library of Munich, Germany.
    2. Alastair M. Gray & Oliver Rivero-Arias & Philip M. Clarke, 2006. "Estimating the Association between SF-12 Responses and EQ-5D Utility Values by Response Mapping," Medical Decision Making, , vol. 26(1), pages 18-29, January.
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    Cited by:

    1. Candio, Paolo & Violato, Mara & Luengo-Fernandez, Ramon & Leal, Jose, 2022. "Cost-effectiveness of home-based stroke rehabilitation across Europe: A modelling study," Health Policy, Elsevier, vol. 126(3), pages 183-189.
    2. Hernandez-Alava, Monica & Pudney, Stephen, 2016. "Copula-based modelling of self-reported health states: an application to the use of EQ-5D-3L and EQ-5D-5L in evaluating drug therapies for rheumatic disease," ISER Working Paper Series 2016-04, Institute for Social and Economic Research.
    3. Simone A. Huygens & Isaac Corro Ramos & Carlijn V. C. Bouten & Jolanda Kluin & Shih Ting Chiu & Gary L. Grunkemeier & Johanna J. M. Takkenberg & Maureen P. M. H. Rutten-van Mölken, 2020. "Early cost-utility analysis of tissue-engineered heart valves compared to bioprostheses in the aortic position in elderly patients," The European Journal of Health Economics, Springer;Deutsche Gesellschaft für Gesundheitsökonomie (DGGÖ), vol. 21(4), pages 557-572, June.

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