Does disease activity add to functional disability in estimation of utility for rheumatoid arthritis patients on biologic treatment?

Rheumatology
Sandhya C NairG Ardine de Wit

Abstract

Treatment in general is mostly directly aimed at disease activity, and measures such as the DAS28 might therefore present important additional information. Our aim was to develop and validate a model that uses a combination of disease activity (DAS28) and HAQs to estimate EuroQoL 5-dimension scale (EQ5D) utilities. Longitudinal data from a cohort study in RA patients from the Utrecht Rheumatoid Arthritis Cohort study Group (Stichting Reumaonderzoek Utrecht) who started treatment with a biologic drug were used for mapping and validation. All 702 observations, including DAS28, HAQ and EQ5D assessed at the same time points, were used. The observations were randomly divided into a subset for development of the model (n = 428 observations) and a subset for validation (n = 274). A stepwise multivariable regression analysis was used to test the association of DAS28 (components) and HAQ (domains) with EQ5D. Model performance was assessed using the explained variance (R(2)) and root mean square errors. Observed and predicted utility scores were compared to check for under- or overestimation of the scores. Finally, the performance of the model was compared with published mapping models. Lower DAS28 score and HAQ items dressing and groomi...Continue Reading

References

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Citations

Jul 6, 2018·Quality of Life Research : an International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation·Thomas PattonShu-Chuen Li

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