EQ-5D The EQ-5D is a standardized, non-disease specific instrument for describing and evaluating health-related quality of life. The instrument measures quality of life in five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. It was introduced as a health-related quality of life measure by a group of European researchers, the EuroQol Group. Respondents can complete the questionnaire in under five minutes. There is a version for adults (age 16 and older) and the EQ-5D-Y for children/adolescents (8 to 15 years). The EQ-5D is available in a wide range of languages and is used worldwide.   The EuroQol Group (1990) EuroQol — A new facility for the measurement of health-related quality of life. Health Policy, 16(3), 199-208. https://doi.org/10.1016/0168-8510(90)90421-9 Brooks, R., & EuroQol Group (1996).EuroQol: The current state of play. Health Policy, 37(1), 53-72. http://dx.doi.org/10.1016/0168-8510(96)00822-6 Devlin, N.J., & Brooks, R. (2