C3 and systemic lupus erythematosus: An analysis of the correlations between clinical characteristics in SLE and MFGE8 SNP showed that rs4945 showed an association with ESR, rs1878326 showed an association with CRP, anti-dsDNA antibody, SLEDAI score, and glucocorticoid dose, and rs1878327 showed an association with alopecia, CRP, complement C3, anti-dsDNA, and SLEDAI score.