Table 2 Clinical periodontal characteristics of participants in the oral hygiene study
Characteristic | No., % |
|---|---|
Number of teetha | |
 Mean number of teeth (mean ± SD) | 27.7 ± 0.8 |
Clinical health and gingivitis | |
 Health (All sites PD ≤3 mm and BOP < 10%) | 870 (59.9) |
 Gingivitis (BOP ≥10% and/or PD ≥4 mm) | 582 (40.1) |
  - Localized gingivitis (BOP < 30%) | 468 (80.4) |
   - Proportion with no sites PD ≥4 mm | 373 (79.7) |
   - Proportion with ≥1 sites PD ≥4 mm | 95 (20.3) |
  - Generalized gingivitis (BOP ≥30%) | 114 (19.6) |
   - Proportion with no sites PD ≥4 mm | 84 (73.7) |
   - Proportion with ≥1 sites PD ≥4 mm | 30 (26.3) |
Bleeding on probing (BOP) | |
 Percent of sites BOP (mean ± SD) | 10.2 ± 12.2 |
 No sites BOP | 301 (20.7) |
  ≥ 1 site BOP | 1151 (79.3) |
  ≥ 1 site BOP & BOP < 10% | 621 (42.8) |
 BOP ≥10% & BOP < 30% | 416 (28.7) |
 BOP ≥30% | 114 (7.9) |
Probing depth (PD) | |
 Mean PD (mm) (mean ± SD) | 1.7 ± 0.3 |
 Mean PD at direct sites (mm) (mean ± SD) | 1.5 ± 0.2 |
 Percent of sites PD ≥4 mm (mean ± SD) | 0.2 ± 1.0 |
  ≥ 1 site PD ≥4 mm | 125 (8.6) |
  ≥ 3 sites PD ≥4 mm | 40 (2.8) |
  ≥ 1 site PD ≥5 mm | 10 (0.7) |
  ≥ 3 sites PD ≥5 mm | 3 (0.2) |
Clinical attachment loss (CAL)b | |
 Mean CAL at direct sites (mm) (mean ± SD) | 1.7 ± 0.3 |
  ≥ 1 site recession ≥1 mm | 184 (12.7) |
  ≥ 1 site CAL ≥4 mm | 206 (14.2) |
  ≥ 3 site CAL ≥4 mm | 72 (5.0) |
  ≥ 1 site CAL ≥5 mm | 65 (4.5) |
  ≥ 3 site CAL ≥5 mm | 14 (1.0) |
  ≥ 1 site CAL ≥6 mm | 21 (1.5) |
  ≥ 3 site CAL ≥6 mm | 3 (0.2) |
 Percent of CAL ≥4 mm due to pocketing (mean ± SD) | 99.6 ± 1.5 |
 Percent of CAL ≥4 mm due to recession (mean ± SD) | 0.3 ± 1.5 |