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Inconsistency and health state valuations

By Paul Dolan and Paul Kind

Abstract

Comparison of scaling methods used to value health states sometimes rests upon an examination of aggregate scores. This analysis is usually undertaken once “inconsistent” respondents have been excluded from the data. However, it is important to have information on the extent to which respondents are logically consistent when valuing health states. The degree of inconsistency will depend on how the health states are described, how the questionnaire is administered and who the respondents are. This paper analyses the inconsistency rates from two studies in which valuations for EuroQol health states were elicited using a visual analogue scale. The studies differed in design and incorporated several different variants of the standard EuroQol questionnaire, thus providing an opportunity to examine the relative importance of the different factors that were thought to affect inconsistency rates. Our general conclusions are that inconsistency rates are higher for postal than for interviewer-based surveys, possibly due to response bias, and that inconsistency rates are positively related to age and negatively related to educational attainment

Topics: RA Public aspects of medicine
Publisher: Springer Netherlands
Year: 2005
DOI identifier: 10.1007/1-4020-3712-0_11
OAI identifier: oai:eprints.lse.ac.uk:33306
Provided by: LSE Research Online
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