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Table 3 RA-associated autoantibodies in “seronegative” RA

From: Presence of autoantibodies in “seronegative” rheumatoid arthritis associates with classical risk factors and high disease activity

Antibody statusa n %
ACPA+/RF+/anti-CarP+ 10 1.9
ACPA+/RF+/anti-CarP− 12 2.3
ACPA+/RF−/anti-CarP+ 22 4.1
ACPA+/RF−/anti-CarP− 115 21.5
ACPA−/RF+/anti-CarP+ 7 1.3
ACPA−/RF+/anti-CarP− 21 3.9
ACPA−/RF−/anti-CarP+ 46 8.6
ACPA−/RF−/anti-CarP− 301 56.4
  1. aAntibody status was evaluated in 534 anti-CCP2 IgG−/IgM RF− EIRA patients. ACPA = any ACPA fine-specificity, RF = IgA and/or IgG RF, anti-CarP = anti-carbamylated fibrinogen antibodies