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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: Arthritis Rheumatol. 2016 Oct;68(10):2384–2393. doi: 10.1002/art.39724

Figure 1.

Figure 1

Flowchart of sample population derivation for this study of the association between serum IgG levels to 19 periodontal bacteria and rheumatoid factor (RF) in dentate participants aged ≥ 60 years from the NHANES III (1988–1994) dataset.