Is there anything I need to be aware of when using EQ-5D-Y-5L compared with EQ-5D-Y-3L?

A considerable number of studies have shown that the EQ-5D-Y-5L is a psychometrically sound instrument which performs at least as well as the EQ-5D-Y-3L, and sometimes better. It has been approved for use by the EuroQol Research Foundation after a long period of development and testing which is described in several publications. Of course, researchers should decide which of the two versions of EQ-5D-Y is the most appropriate for their study, based on their study requirements, study aims, and the study population. Researchers should bear in mind that value sets for economic evaluation are currently not available for the EQ-5D-Y-5L.