“From the ACR 1982 criteria through the EULAR/ACR 2019 criteria it has held true that we do not have a unique laboratory parameter that defines who has SLE,” they said.

EULAR/ACR 2019 SLE criteria fail to outperform ... 2019 classification criteria for systemic lupus erythematosus did not perform significantly better than the ACR 1997 and SLICC 2012 criteria, ...

Investigators tested the performance of the 2019 EULAR/ACR criteria in a retrospective cohort of 126 Asian patients with biopsy-confirmed LN during 2014 to 2018.