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Estimation of a preference based single index from the sexual quality of life questionnaire (SQOL) using ordinal data

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  • Ratcliffe, J
  • Brazier, J
  • Tsuchiya, A
  • Symonds, T
  • Brown, M

Abstract

There is increasing interest in using ordinal methods to estimate cardinal values for health states to calculate quality adjusted life years. This paper reports the estimation of models of rank data and discrete choice experiment (DCE) data to derive a preference-based index from a condition specific measure relating to sexual health and to compare the results to values generated from time trade-off valuation (TTO). The DCE data were analysed using a random effects probit model and the DCE predicted values were rescaled according to the highest and lowest predicted TTO values corresponding to the best and worst SQOL health states respectively. The rank data were analysed using a rank ordered logit model and re-scaled using two alternative methods. Firstly, re-scaling the rank predicted values using identical methods to those employed for DCE and secondly, re-scaling the rank model coefficients by dividing each level coefficient by the coefficient relating to death. The study raises some important issues about the use of ordinal data to produce cardinal health state valuations.

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Bibliographic Info

Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 29768.

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Date of creation: Nov 2006
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Publication status: Published in Health Economics 11.18(2009): pp. 1261-1276
Handle: RePEc:pra:mprapa:29768

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Keywords: sexual health; quality of life; preference-based measures;

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  1. McCabe, Christopher & Brazier, John & Gilks, Peter & Tsuchiya, Aki & Roberts, Jennifer & O'Hagan, Anthony & Stevens, Katherine, 2006. "Using rank data to estimate health state utility models," Journal of Health Economics, Elsevier, Elsevier, vol. 25(3), pages 418-431, May.
  2. Brazier, John & Roberts, Jennifer & Deverill, Mark, 2002. "The estimation of a preference-based measure of health from the SF-36," Journal of Health Economics, Elsevier, Elsevier, vol. 21(2), pages 271-292, March.
  3. Joshua A. Salomon & Christopher J.L. Murray, 2004. "A multi-method approach to measuring health-state valuations," Health Economics, John Wiley & Sons, Ltd., John Wiley & Sons, Ltd., vol. 13(3), pages 281-290.
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