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Testing a new method for estimating the monetary value of a QALY.

Tilling, Carl (2012) Testing a new method for estimating the monetary value of a QALY. PhD thesis, University of Sheffield.

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Objectives The objective of this thesis is to develop and test a new method, based on Time Trade-Off (ITO), for the estimation of the monetary value of a QALY (MVQ) informed by public preferences. Methods Two new questions are developed to estimate an MVQ which ask respondents to trade off length of life to either increase their income, or avoid a decrease in their income. These questions are initially tested through a Dutch online survey with 321 members of the Dutch general public. The questions are further tested through a small scale pilot study, followed by a UK based interview study with 100 members of the general public. In addition, two further questions are also developed and tested in the UK study, which are more closely aligned with the concepts of Willingness to Pay and Willingness to Accept. Results In the Dutch online survey there were a large number of respondents who were not prepared to trade any time to increase their income (or avoid a decrease). Furthermore, some respondents traded too much time, which led to negative MVQ estimates. The prevalence of these responses reduced in the UK based interview study but they were still problematic. Despite this, the questions did appear to be feasible for respondents to complete and were sensitive to scale, particularly in the UK study. Conclusion The evidence tentatively suggests that at least some of the respondents stating an infinite preference for length of life over income, were giving a true statement of preference. The questions could potentially be improved by either decreasing the total value of what is being given up, or by increasing the total value of what is being gained. This could potentially be achieved by extending the time horizon in the exercise.

Item Type: Thesis (PhD)
Academic Units: The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > School of Health and Related Research (Sheffield)
Identification Number/EthosID: uk.bl.ethos.575869
Depositing User: EThOS Import Sheffield
Date Deposited: 06 Jan 2017 12:01
Last Modified: 06 Jan 2017 12:01
URI: http://etheses.whiterose.ac.uk/id/eprint/14603

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