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Table 3 Bivariate correlation analyses of serum anti-citrullinated protein antibodies with clinical RA Parameters

From: Antibodies against citrullinated proteins in relation to periodontitis with or without rheumatoid arthritis: a cross-sectional study

RAPd (n = 20) RA (n = 20)
ACPA r p-value ACPA r p-value
ESR 0.242 0.141 ESR  − 0.133 0.577
Disease duration 0.262 0.264 Disease duration  − 0.012 0.961
  1. Spearman rho correlation test; r-value: 0.5–1.0 (strong correlation); − 0.3 to 0.5 (moderate correlation); below 0.3 (weak to no correlation)
  2. RA, Rheumatoid arthritis; Pd, Periodontitis; RAPd, Subjects with RA and Pd; RA, Subjects with RA but without Pd; ACPA, anti-citrullinated protein antibodies; ESR, Erythrocyte sedimentation rate
  3. **Significant at p < 0.05