Do 2019 European League against rheumatism/American College of Rheumatology classification criteria for systemic lupus erythematosus also indicate the disease activity?

The 2019 European League against rheumatism/American College of Rheumatology classification criteria (2019 criteria) for systemic lupus erythematosus (SLE) has introduced a new scoring system to classify SLE.1 It is a thrill for rheumatologists to get the new SLE classification criteria, which has both excellent sensitivity and specificity, and further demonstrated by other studies to be effective in the early SLE diagnosis and distinguish patients with SLE from patients with primary Sjogren’s syndrome.2 3 It has also been reported that higher scores of 2019 criteria were associated with higher rates of organ damage.4 While using antinuclear antibody (ANA) as an entry criterion, these hierarchically clustered and weighted criteria made a significant breakthrough compared with the past several criteria. However, based on the thinking of weighted criteria, we are curious …