From: Clinical sensitivity of antibodies against cyclic citrulinated peptide in patients with rheumatoid arthritis
Anti-CCP (U)
<50 (neg)
50-200
201-800
801-3200
>3200
RF pos (n = 31)
7 (23%)
4 (13%)
6 (19%)
5 (16%)
9 (29%)
RF neg (n = 38)
23 (60%)
6 (16%)
3 (8%)
4 (11%)
2 (5%)