Journal
BRITISH MEDICAL BULLETIN
Volume 101, Issue 1, Pages 1-15Publisher
OXFORD UNIV PRESS
DOI: 10.1093/bmb/ldr049
Keywords
mapping; economic evaluation; utility; quality-adjusted life year; preference-based measures
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Mapping provides a statistical algorithm that allows the estimation of utilities and consequently calculation of QALYs in clinical studies where preference-based measures are not implemented. Reviews of the mapping literature were utilized. Mapping requires similar populations between the estimation and study data sets, with a high degree of overlap between the target and base measures being desirable. The National Institute for Health and Clinical Excellence recognizes mapping as a method to provide utility information. Issues surrounding mapping include the descriptive system of the measure, the appropriate econometric method and model specification. There is a need for further research into the issue of over-prediction for severe health states and uncertainty around the estimated utility scores. Mapping continues to be an important area of research for economic evaluation, in particular validation of mapping functions.
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