Table 2.
Periodontal characteristics of patients with rheumatoid arthritis (RA) and non-RA controls (NC).
| RA | RA-nonPD | RA-PD | NC | NC-nonPD | NC-PD | p Value | |
|---|---|---|---|---|---|---|---|
| N (%) | 70 (100) | 55 (78.6) | 15 (21.4) | 70 (100) | 53 (75.7) | 17 (24.3) | RA-NC |
| Number of teeth (median, IQR) | 26 (22–28) | 26 (22–28) | 26 (22–29) | 27 (24–30) | 28 (23–31) | 27 (25–28) | 0.072 |
| PISA in mm2 (median, range) | 4.9 (0–1319) | 0.3 (0–126) | 304 (158–1319) | 8.0 (0–1897) | 0 (0–94) | 509 (133–18,970) | 0.635 |
| % of sites with pocket probing depth 1–2 mm | 96 (74–99) | 56 (42–71) | 97 (94–99) | 93 (75–100) | 54 (34–63) | 97 (89–100) | |
| (median, IQR) | |||||||
| % of sites with pocket probing depth 3–4 mm | 4.7 (0.7–24.3) | 41 (27–44) | 2.3 (0.6–6.1) | 5.6 (0–19.4) | 37 (22–43) | 2.1 (0–8.1) | |
| (median, IQR) | |||||||
| % of sites with pocket probing depth ≥5 mm | 0 (0–0.8) | 3.8 (1.1–13) | 0 (0–0) | 0 (0–2.6) | 6.2 (2.0–23) | 0 (0–0) | |
| (median, IQR) | |||||||
| % of sites with bleeding on probing | 1.1 (0–11) | 35 (18–57) | 0.6 (0–2.2) | 1.1 (0–10) | 30 (12–46) | 0 (0–2.8) | |
| (median, IQR) | |||||||
| Periodontal pathogens detected: | |||||||
| P. gingivalis (Pg) (n) (%) | 57 (81.4) | 45 (81.8) | 12 (80.0) | 55 (78.6) | 43 (81.1) | 13 (76.5) | 0.834 |
| A. actinomycetemcomitans (Aa) (n) (%) | 11 (15.7) | 9 (16.4) | 2 (13.3) | 21 (30.0) | 14 (26.4) | 7 (41.2) | 0.070 |
| Pg + Aa (n) (%) | 10 (14.3) | 8 (14.5) | 2 (13.3) | 19 (27.1) | 12(22.6) | 7 (41.2) | 0.094 |
PD: periodontitis, nonPD: no periodontitis. A PISA of ≥130 mm2 has been shown to be associated with the CDC-AAP case definition of periodontitis [24].