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Mapping visual analogue scale health state valuations onto standard gamble and time trade-off values

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  • Dolan, Paul
  • Sutton, Matthew

Abstract

Despite becoming increasingly common in evaluations of health care, different methods of quantitatively measuring health status appear to produce different valuations for identical descriptions of health. This paper reports on a study that elicited health state valuations from the general public using three different methods: the visual analogue scale (VAS), the standard gamble (SG) and the time trade-off (TTO). Two variants of the SG and TTO were tested: Props (using specially designed boards and cards); and No Props (using a self-completion booklet). This paper focuses on empirical relationships between health state valuations from the VAS and the (four) other methods. The relationships were estimated using Tobit regression of individual-level data. In contrast to a priori expectations, the mapping functions estimated suggest that differences are more pronounced across variant than across method. Furthermore, relationships with VAS scores are found to depend on the severity of the state: TTO Props valuations are higher than VAS responses for mild states and lower for more severe states; SG Props valuations are broadly similar to VAS scores over a wide range; and No Props responses are consistently higher than VAS valuations, particularly for more severe states. Explanations are proposed for these findings.

Suggested Citation

  • Dolan, Paul & Sutton, Matthew, 1997. "Mapping visual analogue scale health state valuations onto standard gamble and time trade-off values," Social Science & Medicine, Elsevier, vol. 44(10), pages 1519-1530, May.
  • Handle: RePEc:eee:socmed:v:44:y:1997:i:10:p:1519-1530
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    Citations

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    Cited by:

    1. Trude Arnesen & Mari Trommald, 2005. "Are QALYs based on time trade-off comparable? - A systematic review of TTO methodologies," Health Economics, John Wiley & Sons, Ltd., vol. 14(1), pages 39-53.
    2. Louise Longworth & Stirling Bryan, 2003. "An empirical comparison of EQ-5D and SF-6D in liver transplant patients," Health Economics, John Wiley & Sons, Ltd., vol. 12(12), pages 1061-1067.
    3. Stevens, Katherine & McCabe, Christopher & Brazier, John & Roberts, Jennifer, 2007. "Multi-attribute utility function or statistical inference models: A comparison of health state valuation models using the HUI2 health state classification system," Journal of Health Economics, Elsevier, vol. 26(5), pages 992-1002, September.
    4. Katherine J. Stevens & Christopher J. McCabe & John E. Brazier, 2006. "Mapping between Visual Analogue Scale and Standard Gamble data; results from the UK Health Utilities Index 2 valuation survey," Health Economics, John Wiley & Sons, Ltd., vol. 15(5), pages 527-533.
    5. Rachel Baker & Angela Robinson, 2004. "Responses to standard gambles: are preferences 'well constructed'?," Health Economics, John Wiley & Sons, Ltd., vol. 13(1), pages 37-48.
    6. Tsuchiya, Aki & Brazier, John & Roberts, Jennifer, 2006. "Comparison of valuation methods used to generate the EQ-5D and the SF-6D value sets," Journal of Health Economics, Elsevier, vol. 25(2), pages 334-346, March.
    7. José M. Labeaga & Xisco Oliver & Amedeo Spadaro, "undated". "Measuring Changes in Health Capital," Working Papers 2005-15, FEDEA.
    8. Katherine Stevens & Christopher McCabe & John Brazier, 2007. "Response to Shmueli," Health Economics, John Wiley & Sons, Ltd., vol. 16(7), pages 759-761.
    9. Joshua A. Salomon & Christopher J.L. Murray, 2004. "A multi-method approach to measuring health-state valuations," Health Economics, John Wiley & Sons, Ltd., vol. 13(3), pages 281-290.

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