A methodological study was conducted to examine the effect of extending a frequently used simple multiattribute health-status classification system by adding a cognitive dimension.
The EQ-5D questionnaire is a generic instrument to value health, developed by the EuroQol Group.
The EQ-5D defines health according to five dimensions : mobility, self-care, usual activities, pain/discomfort, and anxiety/depression.
We defined 18 different health states according to the standard EQ-5D classification.
A second set of health states was constructed similar to the first, except for the addition of a cognitive dimension (EQ-5D+C).
Valuations of both sets of health states were statistically analyzed to detect the effect of the additional dimension.
The cognitive dimension generated systematically different values compared with the standard EQ-5D version, whereas the content validity improved.
Both systems evoked equally reliable values.
Analyses showed that a simple additive model to predict summary values for health states was not optimal for both systems.
Although there is a current lack of consensus regarding the domains that are selected to represent health status, this study has shown the importance of considering the inclusion of a cognitive domain.
Mots-clés Pascal : Classification, Santé, Cognition, Méthodologie, Evaluation, Homme, Epidémiologie
Mots-clés Pascal anglais : Classification, Health, Cognition, Methodology, Evaluation, Human, Epidemiology
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0283427
Code Inist : 002B30A01A1. Création : 16/11/1999.