The EuroQol Group published a commentary entitled: EQ-5D, a plea for accurate nomenclature.

‘EQ-5D’ is not an abbreviation; it is the correct term to use, as are ‘EQ-5D-3L’, ‘ED-5D-5L’, and ‘EQ-5D-Y’ and they require no further definition. In the interests of accuracy and good practice, the EuroQol Group urges users of its instruments to employ the standard EQ-5D nomenclature when reporting and discussing their findings.

The commentary can be accessed through this link.