• PharmacoEconomics · Jun 2018

    German Value Set for the EQ-5D-5L.

    • Kristina Ludwig, Graf von der SchulenburgJ-MatthiasJMCenter for Health Economics Research Hannover (CHERH), Leibniz Universität Hannover, Otto-Brenner-Straße 1, 30159, Hannover, Germany., and Wolfgang Greiner.
    • Health Economics and Health Care Management, Bielefeld University, P.O. Box 10 01 31, 33501, Bielefeld, Germany. kristina.ludwig@uni-bielefeld.de.
    • Pharmacoeconomics. 2018 Jun 1; 36 (6): 663-674.

    ObjectivesThe objective of this study was to develop a value set for EQ-5D-5L based on the societal preferences of the German population. As the first country to do so, the study design used the improved EQ-5D-5L valuation protocol 2.0 developed by the EuroQol Group, including a feedback module as internal validation and a quality control process that was missing in the first wave of EQ-5D-5L valuation studies.MethodsA representative sample of the general German population (n = 1158) was interviewed using a composite time trade-off and a discrete choice experiment under close quality control. Econometric modeling was used to estimate values for all 3125 possible health states described by EQ-5D-5L. The value set was based on a hybrid model including all available information from the composite time trade-off and discrete choice experiment valuations without any exclusions due to data issues.ResultsThe final German value set was constructed from a combination of a conditional logit model for the discrete choice experiment data and a censored at -1 Tobit model for the composite time trade-off data, correcting for heteroskedasticity. The value set had logically consistent parameter estimates (p < 0.001 for all coefficients). The predicted EQ-5D-5L index values ranged from -0.661 to 1.ConclusionsThis study provided values for the health states of the German version of EQ-5D-5L representing the preferences of the German population. The study successfully employed for the first time worldwide the improved protocol 2.0. The value set enables the use of the EQ-5D-5L instrument in economic evaluations and in clinical studies.

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