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Table 4 Bivariate correlation analyses of serum anti-citrullinated protein antibodies with clinical periodontal 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) Pd (n = 20) HC (n = 20)
ACPA r p-value r p-value r p-value r p-value
VPI 0.228 0.334 0.254 0.28 0.119 0.618 0.085 0.723
GBI 0.052 0.828  − 0.030 0.90 0.045 0.850  − 0.058 0.808
PPD  − 0.03 0.899  − 0.057 0.811 0.051 0.830  − 0.182 0.441
CAL
PISA
0.099
0.211
0.678
0.373
0.275
0.137
0.240
0.565
0.107
 − 0.032
0.654
0.895
 − 0.201
 − 0.093
0.196
0.698
  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; Pd, Subjects without RA but has Pd; HC, Subjects without both RA and Pd; ACPA, anti-citrullinated protein antibodies; VPI, visible plaque index; GBI, gingival bleeding index; PPD, probing pocket depth; CAL, clinical attachment level
  3. **Significant at p < 0.05