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Table 1

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%)