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Does the value of quality of life depend on duration?

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Author Info

  • Devlin, N.
  • Tsuchiya, A.
  • Buckingham, K.
  • Tilling, C.

Abstract

The aims of this study are to investigate the feasibility of eliciting Time Trade Off (TTO) valuations using short durations; to determine the effect of contrasting durations on individuals’ responses to the TTO; to examine variations within and between respondents’ values with respect to duration; and to consider the insights provided by participants’ comments and explanations regarding their reaction to duration in the valuation task. 27 participants provided TTO values using short and long durations for three EQ-5D states. Feedback was sought using a series of open ended questions. Of the 81 opportunities to observe it, strict constant proportionality was satisfied twice. 11 participants had no systematic relationship between duration and value; 11 provided consistently lower valuations in long durations, while 5 had higher valuations in long durations. Comments provided by participants were consistent with the values they provided. Mean TTO values did not differ markedly between alternative durations. We conclude that it is feasible to elicit TTO values for short durations. There is considerable heterogeneity in individuals’ responses to the time frames used to elicit values. Further research is required to ensure that the values used in cost effectiveness analysis adequately represent preferences about quality and length of life.

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File URL: http://openaccess.city.ac.uk/1493/1/Does_the_value_of_quality_of_life_depend_on_duration.pdf
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Bibliographic Info

Paper provided by Department of Economics, City University London in its series Working Papers with number 09/07.

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Date of creation: 2009
Date of revision:
Handle: RePEc:cty:dpaper:09/07

Contact details of provider:
Postal: Department of Economics, Social Sciences Building, City University London, Whiskin Street, London, EC1R 0JD, United Kingdom,
Phone: +44 (0)20 7040 8500
Web page: http://www.city.ac.uk
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Related research

Keywords: NICE; cost effectiveness; TTO; EQ-5D; constant proportionality; duration;

References

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  1. Buckingham, Ken J. & Devlin, Nancy Joy, 2009. "A note on the nature of utility in time and health and implications for cost utility analysis," Social Science & Medicine, Elsevier, vol. 68(2), pages 362-367, January.
  2. Nancy J. Devlin & Aki Tsuchiya & Ken Buckingham & Carl Tilling, 2011. "A uniform time trade off method for states better and worse than dead: feasibility study of the ‘lead time’ approach," Health Economics, John Wiley & Sons, Ltd., vol. 20(3), pages 348-361, March.
  3. Dolan, Paul & Stalmeier, Peep, 2003. "The validity of time trade-off values in calculating QALYs: constant proportional time trade-off versus the proportional heuristic," Journal of Health Economics, Elsevier, vol. 22(3), pages 445-458, May.
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Cited by:
  1. Nancy J. Devlin & Aki Tsuchiya & Ken Buckingham & Carl Tilling, 2011. "A uniform time trade off method for states better and worse than dead: feasibility study of the ‘lead time’ approach," Health Economics, John Wiley & Sons, Ltd., vol. 20(3), pages 348-361, March.
  2. Sharma, Rajiv & Stano, Miron, 2010. "Implications of an economic model of health states worse than dead," Journal of Health Economics, Elsevier, vol. 29(4), pages 536-540, July.

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