Clinical and Serological Correlates of Serum C1Q and Anti-C1Q Antibodies in South Africans With Systemic Lupus Erythematosus
Objective: To investigate prevalence and clinical correlates of serum C1q and anti-C1q antibody titres in black South Africans with systemic lupus erythematosus (SLE). Methods: Cross-sectional study of 96 SLE patients, 49 with lupus nephritis (LN). Anti-C1q antibodies were tested by ELISA. Serum C1q was measured as a percentage of normal by immunoelectrophoresis. Disease activity was assessed usin
