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Measuring health-related utility: why the disparity between EQ-5D and SF-6D?

Authors
  • Bryan, Stirling
  • Longworth, Louise
Type
Published Article
Journal
The European journal of health economics : HEPAC : health economics in prevention and care
Publication Date
Sep 01, 2005
Volume
6
Issue
3
Pages
253–260
Identifiers
PMID: 15968563
Source
Medline
License
Unknown

Abstract

There remains considerable disagreement concerning the preferred generic utility-based measure of health-related quality of life for use in constructing quality-adjusted life years. The recent appearance (in a published form) of a new measure, the SF-6D, has highlighted this issue. The SF-6D and EQ-5D have many similarities, but marked variation has been shown in the results generated by the two instruments. The study reported here is an exploration of why such divergent results exist. There are two possible explanations: variation in the descriptive component of the instruments and variation in the values applied to health states. The results suggest two important conclusions. First, the SF-6D can describe severe health states, including states that (according to the EQ-5D scoring algorithm) are viewed as worse than the state of being 'dead'. Second, much of the large discrepancy between the results generated using the two instruments appears to stem from very different valuations being placed on similar health states.

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