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Fig. 1 | BMC Musculoskeletal Disorders

Fig. 1

From: Smoking, Porphyromonas gingivalis and the immune response to citrullinated autoantigens before the clinical onset of rheumatoid arthritis in a Southern European nested case–control study

Fig. 1

Antibodies to RgpB in (a) healthy controls versus patients with periodontitis. Using the 95th percentile of the healthy controls as a cut-off (dashed line), 48 % of patients were positive (p < 0.0001); (b) healthy and periodontitis subjects that are PCR negative for P.gingivalis in dental plaque compared to PCR positive periodontitis patients. In the latter group, 75 % were antibody positive (p < 0.0001). Solid lines represent medians

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