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Assessment of the Swedish EQ-5D experience-based value sets in a total hip replacement population

Journal article
Authors Szilard Nemes
Kristina Burström
Niklas Zethraeus
Ted Eneqvist
Göran Garellick
Ola Rolfson
Published in Quality of Life Research
Volume 24
Issue 12
Pages 2963-2970
ISSN 0962-9343
Publication year 2015
Published at Institute of Clinical Sciences, Department of Orthopaedics
Pages 2963-2970
Language en
Links dx.doi.org/10.1007/s11136-015-1020-...
Keywords EQ-5D, Experience-based value sets, Visual analogue scale, Time trade-off, Swedish Hip Arthroplasty Register, Total hip replacement, Quality register
Subject categories Orthopedics

Abstract

Background All patients undergoing elective total hip replacement (THR) in Sweden are asked to complete a survey, including the EQ-5D. Thus far, EQ-5D values have been presented using the UK TTO value set based on hypothetical values. Shift to the use of the recently introduced Swedish experience-based value set, derived from a representative Swedish population, is an appealing alternative. Purpose To investigate how accurate the Swedish experience-based VAS value set predicts observed EQ VAS values and to compare correlations between Swedish and UK value sets including two provisional value sets derived from the THR population. Methods Pre- and one-year postoperative data from 56,062 THR patients from the Swedish Hip Arthroplasty Register were used. Agreement between the observed and the predicted EQ VAS values was assessed with correlation. Based on pre- and postoperative data, we constructed two provisional VAS value sets. Results Correlations between observed and calculated values using the Swedish VAS value set were moderate (r = 0.46) in preoperative data and high (r = 0.72) in postoperative data. Correlations between UK and register-based value sets were constantly lower compared to Swedish value sets. Register-based values and Swedish values were highly correlated. Conclusions The Swedish value sets are more accurate in terms of representation of the Swedish THR patients than the currently used UK TTO value set. We find it feasible to use the experience-based Swedish value sets for further presentation of EQ-5D values in the Swedish THR population.

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