Les utilités EQ-5D et SF-6D dans la polyarthrite débutante

Abstract : The explosion of drug development for rheumatoid arthritis and the revolution of early aggressive therapy for the disease have fuelled the search for better approaches to establish cost-effectiveness in early arthritis (EA), but consensus is lacking on the choice of utility instrument. We aimed to compare the EQ-5D and SF-6D, 2 indirect utility measures widely used to calculate quality-adjusted life-years (QALYs), in terms of their utility values, their performance and their determinants in a large prospective cohort of patients with EA. In conclusion, the EQ-5D and SF-6D are not interchangeable: their scales, distributions, reliability and responsiveness are different. There is systematic disagreement between the EQ-5D and SF-6D in EA especially in patients with worse clinical outcomes and more specifically with high functional disability. Several elements suggest that the SF-6D may be more appropriate for clinical trials of biologics in patients with EA: the bimodal distribution of the EQ-5D, its lower reliability and responsiveness for EA improvement than the SF-6D, its high variability in the estimation of the utility gains and thus QALYs gains and the problems raised by the meaning of a state labeled " worse than the death " (which is not the one from the patient)
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Cécile Gaujoux-Viala. Les utilités EQ-5D et SF-6D dans la polyarthrite débutante. Médecine humaine et pathologie. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0418⟩. ⟨tel-01751208⟩

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