Abstract
Background A previous study evaluating the psychometric properties of the traditional EQ-5D in asthmatic patients showed a high ceiling effect (59% of patients with perfect health) questioning its usefulness in these patients. Therefore, the EuroQol Group developed a new EQ-5D version increasing the number of responses from 3 to 5 levels. This new version, the EQ-5D-5L, has never been tested in asthmatic patients. The aim of this study is to examine the distribution and construct validity of the new EQ-5D-5L in a European cohort of asthmatic adolescents and adults.
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