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Towards a better QALY model

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  • José‐María Abellán‐Perpiñán
  • José‐Luis Pinto‐Prades
  • Ildefonso Méndez‐Martínez
  • Xabier Badía‐Llach

Abstract

This paper presents a test of the predictive validity of various classes of QALY models (i.e. linear, power and exponential models). We first estimated TTO utilities for 43 EQ‐5D chronic health states and next these states were embedded in nonchronic health profiles. The chronic TTO utilities were then used to predict the responses to TTO questions with nonchronic health profiles. We find that the power QALY model clearly outperforms linear and exponential QALY models. Optimal power coefficient is 0.65. Our results suggest that TTO‐based QALY calculations may be biased. This bias can be corrected using a power QALY model. Copyright © 2006 John Wiley & Sons, Ltd.

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  • José‐María Abellán‐Perpiñán & José‐Luis Pinto‐Prades & Ildefonso Méndez‐Martínez & Xabier Badía‐Llach, 2006. "Towards a better QALY model," Health Economics, John Wiley & Sons, Ltd., vol. 15(7), pages 665-676, July.
    • Handle: RePEc:wly:hlthec:v:15:y:2006:i:7:p:665-676
    DOI: 10.1002/hec.1095
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    Cited by:

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    2. Pinto-Prades, Jose Luis & Loomes, Graham & Brey, Raul, 2009. "Trying to estimate a monetary value for the QALY," Journal of Health Economics, Elsevier, vol. 28(3), pages 553-562, May.
    3. Attema, Arthur E. & Brouwer, Werner B.F., 2012. "A test of independence of discounting from quality of life," Journal of Health Economics, Elsevier, vol. 31(1), pages 22-34.
    4. Attema, Arthur E. & Brouwer, Werner B.F., 2009. "The correction of TTO-scores for utility curvature using a risk-free utility elicitation method," Journal of Health Economics, Elsevier, vol. 28(1), pages 234-243, January.
    5. Lipman, Stefan A. & Brouwer, Werner B.F. & Attema, Arthur E., 2020. "Living up to expectations: Experimental tests of subjective life expectancy as reference point in time trade-off and standard gamble," Journal of Health Economics, Elsevier, vol. 71(C).
    6. Sergey Drobyshevsky & Pavel Trunin & M. Kamenskikh, 2008. "Analysis of Transmission Mechanisms of Money and Credit Policy in Russia's Economy," Research Paper Series, Gaidar Institute for Economic Policy, issue 116P.
    7. Robinson, Angela & Gyrd-Hansen, Dorte & Bacon, Philomena & Baker, Rachel & Pennington, Mark & Donaldson, Cam, 2013. "Estimating a WTP-based value of a QALY: The ‘chained’ approach," Social Science & Medicine, Elsevier, vol. 92(C), pages 92-104.
    8. Wijayaratna, Kasun P. & Dixit, Vinayak V., 2016. "Impact of information on risk attitudes: Implications on valuation of reliability and information," Journal of choice modelling, Elsevier, vol. 20(C), pages 16-34.

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