Figure 2From: Clinical correlations with Porphyromonas gingivalis antibody responses in patients with early rheumatoid arthritisAnti-cyclic citrullinated peptide antibody levels in rheumatoid arthritis patients and comparison groups. Anti-cyclic citrullinated peptide (anti-CCP) antibody responses are shown in age-similar healthy hospital personnel, patients with connective tissue diseases and early and late rheumatoid arthritis patient groups. Mean values and standard errors of the mean are shown, and the shaded region represents negative values.Back to article page