The EQ-5D-3L (EQ-5D 3 level) is available in more than 160 translated versions. Although the EQ-5D-3L was primarily designed for self-completion in paper format by the patient or respondent, EQ-5D data can also be collected using the following alternative modes of administration, and in multiple translations.
The EQ-5D-5L (EQ-5D 5 level) is available in more than 125 translated versions. The EuroQol Group launched the new EQ-5D-5L self-complete version in 2009 with the aim of further improving the sensitivity and reducing ceiling effects of the existing EQ-5D-3L version. This is also available in alternative modes of administration.
EQ-5D bolt-ons/dimension extensions
Bolt-ons (add-ons/dimension extensions) identify key dimensions of HRQol which may be important to patients but are not captured by the EQ-5D. Until now, they have not been part of the EQ research agenda but the EuroQol Executive Committee has approved the development of a systematic, scientifically robust approach to the development of EQ-5D bolt-on dimensions for use in different clinical areas.