Subjects Mean sMFI of E-CR1 SLE (n=36) 1.79 ± 0.16 a b RA (n=11) 2.71 ± 0.46 a SS (n=12) 3.06 ± 0.31 APS (n=3) 3.75 ± 0.35 MCTD (n=5) 2.28 ± 0.52 a RD (n=4) 3.26 ± 0.63 AS (n=11) 3.83 ± 0.49 TB (n=5) 1.83 ± 0.43 a b Healthy controls (n=26) 3.82 ± 0.32 aSignificant difference (P < 0.05) compared to healthy controls. bSignificant difference (P < 0.05) compared to RA patients. SLE= Systemic Lupus Erythematosus, RA= Rheumatoid Arthritis, SS= Sjögren’s Syndrome, APS= Anti-Phospholipid Syndrome, MCTD= Mixed Connective Tissue Disease, RD= Raynoud’s Disease, AS= Ankylosing Spondylitis, TB= Pulmonary Tuberculosis

Table 2: Mean sMFI values of E-CR1 in SLE patients, patients with other diseases, and healthy controls.