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Table 2 Percentages of seropositivity for anti-carbamylated antibodies and various citrullinated peptides and their native arginine counterparts according to cutoff levels of >2 SD above the mean of healthy controls

From: Rheumatoid arthritis–associated autoantibodies in non–rheumatoid arthritis patients with mucosal inflammation: a case–control study

Patient group Healthy controls Periodontitis Bronchiectasis Cystic fibrosis Rheumatoid arthritis
Anti-CarP IgG (% pos.) 0 3.5 3.8 7.3 48
Peptides IgG (% pos.)      
Cit. fibrinogen-1 2.8 0.9 1.3 0 55
Arg. fibrinogen-1 0 0.9 1.3 2.4 0
Cit. fibrinogen-2 0 4.4 2.5 0 71
Arg. fibrinogen-2 2.8 3.5 3.8 4.9 2.3
Cit. α-enolase 0 0.9 2.5 0 38
Arg. α-enolase 2.8 1.8 6.3 4.9 1.2
Cit. vimentin 0 1.8 0 0 48
Arg. vimentin 5.6 5.3 1.3 7.3 1.2
Peptide IgA (% pos.)      
Cit. fibrinogen-1 0 0.9 0 0 8.1
Arg. fibrinogen-1 2.8 0.9 2.5 0 0
Cit. fibrinogen-2 2.8 2.6 0 0 19
Arg. fibrinogen-2 0 7.9 2.5 9.8 4.7
Cit. α-enolase 0 2.6 0 0 7.0
Arg. α-enolase 8.3 2.6 6.3 7.3 4.7
Cit. vimentin 0 0 0 0 4.7
Arg. vimentin 5.6 4.4 2.5 4.9 2.3
  1. Arg. Arginine, Anti-CarP anti-carbamylated protein; Cit. citrulline, Ig immunoglobulin, % pos. percentage positive