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Making Rasch decisions: the use of Rasch analysis in the construction of preference based health related quality of life instruments

  • Young, Tracey A.
  • Yang, Y
  • Brazier, J
  • Tsuchiya, A
  • Coyne, K

Objective: To set out the methodological process for using Rasch analysis alongside traditional psychometric methods in the development of a health state classification that is amenable to valuation. Methods: The overactive bladder questionnaire is used to illustrate a four step process for deriving a reduced health state classification from an existing nonpreference based health related quality of life instrument. Step I excludes items that do not meet the initial validation process and step II uses criteria based on Rasch analysis and psychometric testing to select the final items for the health state classification. In step III, item levels are examined and Rasch analysis is used to explore the possibility of reducing the number of item levels. Step IV repeats steps I to III on alternative data sets in order to validate the selection of items for the health state classification. Conclusions: The techniques described enable the construction of a health state classification amenable for valuation exercises that will allow the derivation of preference weights. Thus, the health related quality of life of patients with conditions, like overactive bladder, can be valued and quality adjustment weights such as quality adjusted life years derived.

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Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 29828.

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Date of creation: 2008
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Publication status: Published in Quality of Life Research 2.18(2009): pp. 253-265
Handle: RePEc:pra:mprapa:29828
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  1. J. A. Kregel, 1980. "Introduction," Journal of Post Keynesian Economics, M.E. Sharpe, Inc., vol. 3(1), pages 19-20, October.
  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, vol. 21(2), pages 271-292, March.
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