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Background: EQ-5D health state utilities (HSU) are commonly used in health economics to compute quality-adjusted life years (QALYs). The EQ-5D, which is country-specific, can be derived directly or by mapping from self-reported health-related quality of life (HRQoL) scales such as the PROMIS-29 profile. The PROMIS-29 from the Patient Reported Outcome Measures Information System is a comprehensive assessment of self-reported health with excellent psychometric properties. We sought to find optimal models predicting the EQ-5D from the PROMIS-29 in the United Kingdom, France, and Germany and compared the prediction performances with that of a US model.Methods: We collected EQ-5D-5L and PROMIS-29 profiles and three samples representative of the general populations in the UK (n=1,509), France (n=1,501), and Germany (n=1,502). We used stepwise regression with backward selection to find the best models to predict the EQ-5D from all seven PROMIS-29 domains. We investigated the agreement between the observed and predicted EQ-5D in all three countries using various indices for the prediction performance, including Bland-Altman plots to examine the performance along the HSU continuum.Results: The EQ-5D was best predicted in France (nRMSEFRA = 0.075, nMAEFRA = 0.052), followed by the UK (nRMSEUK = 0.076, nMAEUK = 0.053) and Germany (nRMSEGER = 0.079, nMAEGER = 0.051). The Bland-Altman plots show that the inclusion of higher-order effects reduced the overprediction of low HSU scores.Conclusions: Our models provide a valid method to predict the EQ-5D from the PROMIS-29 for the UK, France, and Germany.

Background: EQ-5D health utility (HU) scores are commonly used in health economics to compute quality-adjusted life years (QALYs). EQ-5D scores, which are country-specific, can be derived directly or by mapping from self-reported health-related quality of life (HRQoL) scales such as the PROMIS-29 profile. The PROMIS-29 from the Patient Reported Outcome Measures Information System is a comprehensive assessment of self-reported health with excellent psychometric properties. We sought to find optimal models for predicting EQ-5D scores from the PROMIS-29 in the United Kingdom, France, and Germany and compared the prediction performances with that of a US model.Methods: We collected EQ-5D-5L and PROMIS-29 profiles and three samples representative of the general populations in the UK (n=1,509), France (n=1,501), and Germany (n=1,502). We used stepwise regression with backward selection to find the best models to predict the EQ-5D score from all seven PROMIS-29 domains. We investigated the agreement between the observed and predicted EQ-5D scores in all three countries using various indices for the prediction performance, including Bland-Altman plots to examine the performance along the HU continuum.Results:The EQ-5D index scores were best predicted in Germany (RMSEGER = 0.10, MAEGER = 0.06), followed by France (RMSEFR = 0.11, MAEFR = 0.08) and the UK (RMSEUK = 0.12, MAEUK = 0.09). The Bland-Altman plots show that the inclusion of higher-order effects reduced the underprediction of low HU scores.Conclusions: Our models provide a valid method to predict EQ-5D-5L index scores from the PROMIS-29 for the UK, France, and Germany.

International audience; 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.

Background PROMIS-29 is a new generic standardized questionnaire measuring self-reported health status. It was developed as part of the Patient Reported Outcome Measurement Information System (PROMIS) in the United States. The objective of this study was to carry out the psychometric validation of a French-language version of PROMIS-29 and to establish general population reference values for France. Methods Quota sampling was conducted by an independent polling company (Ipsos) to obtain a general population sample (n = 1,501) representative with regards to: gender, age, occupation, region, and population density of the place of residence. Data collected included the results of the questionnaires PROMIS-29 and Short Form Health Survey (SF-36), the presence of selected chronic diseases, and socio-demographic information. Results The French PROMIS-29 demonstrated excellent factorial validity, confirming the 7-factor model of the original PROMIS-29. The use of modern measurement methods indicated that the PROMIS-29 scales satisfy the important characteristics of unidimensionality and, for five of the seven composite scales, invariance across age, educational level and gender. Gender and age specific (10-year intervals) reference values were generated for PROMIS-29 use in France. Conclusion The French version of PROMIS-29 is a valid and reliable measure of self-reported health status in the French population. The instrument's sensitivity to change needs to be evaluated before its use in longitudinal studies can be recommended.