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19-01-2018 | Uitgave 4/2018

Quality of Life Research 4/2018

Measurement invariance and general population reference values of the PROMIS Profile 29 in the UK, France, and Germany

Tijdschrift:
Quality of Life Research > Uitgave 4/2018
Auteurs:
Felix Fischer, Chris Gibbons, Joël Coste, Jose M. Valderas, Matthias Rose, Alain Leplège
Belangrijke opmerkingen

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s11136-018-1785-8) contains supplementary material, which is available to authorized users.
Matthias Rose and Alain Leplège have contributed equally.

Abstract

Purpose

Comparability of patient-reported outcome measures over different languages is essential to allow cross-national research. We investigate the comparability of the PROMIS Profile 29, a generic health-related quality of life measure, in general population samples in the UK, France, and Germany and present general population reference values.

Methods

A web-based survey was simultaneously conducted in the UK (n = 1509), France (1501), and Germany (1502). Along with the PROMIS Profile 29, we collected sociodemographic information as well as the EQ-5D. We tested measurement invariance by means of multigroup confirmatory factor analysis (CFA). Differences in the health-related quality of life between countries were modeled by linear regression analysis. We present general population reference data for the included PROMIS domains utilizing plausible value imputation and quantile regression.

Results

Multigroup CFA of the PROMIS Profile 29 showed that factor means are insensitive to potential measurement bias except in one item. We observed significant differences in patient-reported health between countries, which could be partially explained by the differences in overall ratings of health. The physical function and pain interference scales showed considerable floor effects in the normal population in all countries.

Conclusions

Scores derived from the PROMIS Profile 29 are largely comparable across the UK, France, and Germany. Due to the use of plausible value imputation, the presented general population reference values can be compared to data collected with other PROMIS short forms or computer-adaptive tests.

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Extra materiaal
Supplementary material 1 (PDF 49 KB)
11136_2018_1785_MOESM1_ESM.pdf
Literatuur
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