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The quality-adjusted life year (QALY) assumes that the value of a health state is linearly related to the time spent in it, which implies that the value of a health state is independent of the states which precede or follow it. Irritable bowel syndrome (IBS) is a suitable condition to test this assumption since it is subject to considerable fluctuations(More)
The quality-adjusted life year makes a number of restrictive assumptions about the nature of one's preference over health. The healthy year equivalent was originally proposed over 10 years ago as a major theoretic advance on the quality-adjusted life year. This article reviews the theoretic, empiric and normative bases for the healthy year equivalent and(More)
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