PSIP1 and systemic lupus erythematosus: The prevalence of anti-DFS70 antibodies in LN patients (19.6%, 74/377) was similar to NLN-SLE patients (19.8%, 53/268, P=0.9630), but significantly higher compared to HI (9.0%, 7/78, P=0.0252) and CKD patients (13.4%, 31/232, P=0.0468).