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Table 3 Association of HLA-DRB1 shared epitopes alleles with anti-CCP and rheumatoid factor antibodies in rheumatoid arthritis patients (n = 65)

From: Association of rheumatoid arthritis and its severity with human leukocytic antigen-DRB1 alleles in Kurdish region in North of Iraq

SE status SE positive (n = 48) no. (%) SE negative (n = 17) no. (%) OR (95%) P value
Anti-CCP positive 35 (72.81%) 6 (35.29%) 4.93 (1.51–16.08) 0.005
Anti-CCP negative 13 (27.08%) 11 (64.70%) 0.20 (0.06–0.65) 0.005
RF positive 37 (77.08%) 7 (41.17%) 4.80 (1.48–15.59) 0.006
RF negative 11 (22.91%) 10 (58.82%) 0.20 (0.064–0.67) 0.006