Mapping between 6 Multiattribute Utility Instruments

Gang Chen, Munir Khan, Angelo Iezzi, Julie Ratcliffe, Jeff Richardson

    Research output: Contribution to journalArticlepeer-review

    32 Citations (Scopus)

    Abstract

    Background: Cost-utility analyses commonly employ a multiattribute utility (MAU) instrument to estimate the health state utilities, which are needed to calculate quality-adjusted life years. Different MAU instruments predict significantly different utilities, which makes comparison of results from different evaluation studies problematical. Aim: This article presents mapping functions (“crosswalks�) from 6 MAU instruments (EQ-5D-5L, SF-6D, Health Utilities Index 3 [HUI 3], 15D, Quality of Well-Being [QWB], and Assessment of Quality of Life 8D [AQoL-8D]) to each of the other 5 instruments in the study: a total of 30 mapping functions. Methods: Data were obtained from a multi-instrument comparison survey of the public and patients in 7 disease areas conducted in 6 countries (Australia, Canada, Germany, Norway, United Kingdom, and United States). The 8022 respondents were administered each of the 6 study instruments. Mapping equations between each instrument pair were estimated using 4 econometric techniques: ordinary least squares, generalized linear model, censored least absolute deviations, and, for the first time, a robust MM-estimator. Results: Goodness-of-fit indicators for each of the results are within the range of published studies. Transformations reduced discrepancies between predicted utilities. Incremental utilities, which determine the value of quality-related health benefits, are almost perfectly aligned at the sample means. Conclusion: Transformations presented here align the measurement scales of MAU instruments. Their use will increase confidence in the comparability of evaluation studies, which have employed different MAU instruments.

    Original languageEnglish
    Pages (from-to)160-175
    Number of pages16
    JournalMedical Decision Making
    Volume36
    Issue number2
    DOIs
    Publication statusPublished - 1 Feb 2016

    Keywords

    • cost-effectiveness analysis
    • cost-utility analysis
    • health-related quality of life
    • mapping
    • utility

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