 The Use of Rasch Analysis in Reducing a Large Condition-Specific Instrument for Preference ValuationTracey A. Young, Yaling Yang, John E. Brazier and Aki Tsuchiya () Medical Decision Making, 2011, vol. 31, issue 1, 195-210 Abstract: The majority of health-related quality-of-life instruments are not preference-based measures and so cannot be used within cost utility analysis. The Asthma Quality of Life Questionnaire (AQLQ) is one such instrument. The aim of this study was to develop a health state classification that was amenable to valuation from the AQLQ, this being the 1st stage in developing a condition-specific preference-based measure for asthma patients. Rasch models were applied to samples of responders to the AQLQ with the aim of selecting a number of items for a preference-based utility measure (AQL-5D). Selection of items for the evaluation survey was supported with classical psychometric criteria for item selection (feasibility, internal consistency, floor and ceiling effects, and responsiveness). Rasch analysis proved to be a useful tool in assisting in the initial process of selecting items from an existing health-related quality-of-life instrument in the construction of the AQL-5D. The method is recommended for use alongside classical psychometric testing to aid in the development of preference-based measures. Keywords: asthma; pulmonary disease; health-related quality of life (HRQOL); Rasch analysis; preference-based measures (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:sae:medema:v:31:y:2011:i:1:p:195-210 Access Statistics for this article More articles in Medical Decision Making |
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