The EORTC QLU-C10D was more efficient in detecting clinical known group differences in myelodysplastic syndromes than the EQ-5D-3L

Gamper, Eva M;Cottone, Francesco;Sommer, Kathrin;Norman, Richard;King, Madeleine;Breccia, Massimo;Caocci, Giovanni;Patriarca, Andrea;Palumbo, Giuseppe A;Stauder, Reinhard;Niscola, Pasquale;Platzbecker, Uwe;Caers, Jo;Vignetti, Marco;Efficace, Fabio

2021-01-01

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Abstract

Background: The aim was to investigate the relative validity of the preference-based measure EORTC QLU-C10D in comparison with the EQ-5D-3L in myelodysplastic syndromes (MDS) patients. Methods: We used data from an international multicentre, observational cohort study of MDS patients. Baseline EORTC QLU- C10D and EQ-5D-3L scores were used and index scores calculated for Italy, Australia, and the UK. Criterion validity was established by Spearman and intraclass correlations (ICC) and Bland-Altman plots. Construct validity was established by the instruments’ ability to discriminate known groups, i.e. groups whose health status is expected to differ. Results: We analyzed data from 619 MDS patients (61.1% male; median age 73.8 years). Correlations between theoretically corresponding domains were largely higher than between unrelated domains. ICCs and Bland-Altman plots indicated moderate to good criterion validity. Ceiling effects were lower for the QLU-C10D (4.7%) than for the EQ-5D-3L (22.6%). The EQ-5D-3L failed to discriminate known-groups in two and the QLU-C10D in one of the comparisons; the QLU-C10D’s efficiency in doing so was higher in clinical known-groups. Results were comparable between the countries. Conclusions: The QLU-C10D may be suitable to generate health utilities for economic research in MDS. Responsiveness and minimal important differences need yet to be established