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The Stata Journal
Volume 18 Number 2: pp. 395-415



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eq5dmap: A command for mapping between EQ-5D-3L and EQ-5D-5L

Mónica Hernández-Alava
School of Health and Related Research
Health Economics and Decision Science
University of Sheffield
Sheffield, UK
monica.hernandez@sheffield.ac.uk
Stephen Pudney
School of Health and Related Research
Health Economics and Decision Science
University of Sheffield
Sheffield, UK
steve.pudney@sheffield.ac.uk
Abstract.  In this article, we describe a new command, eq5dmap, for conditional prediction of the utility values of EQ-5D-5L (EQ-5D-3L) from observed or specified values of EQ-5D-3L (EQ-5D-5L) conditional on age and gender. Predictions can be made either from the five-item health descriptions or from the (exact or approximate) utility score. The prediction process is based on a joint statistical model of the two variants of EQ-5D that have been fit to alternative reference datasets (the National Data Bank for Rheumatic Diseases and a EuroQol Group coordinated data-collection study). The underlying model is a system of ordinal regressions with a flexible residual distribution specified as Gaussian or as a copula mixture. Use of the command is illustrated with an application that includes an investigation of the sensitivity of the mapping outcomes to the choice of reference dataset.
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View all articles by these authors: Mónica Hernández-Alava, Stephen Pudney

View all articles with these keywords: eq5dmap, EQ-5D, EQ-5D-3L, EQ-5D-5L, mapping, conditional prediction, copula, mixture model

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