Table 1 Characteristics of participants and examining sites
| Participants | ||
| Number of participants | 35 | |
| Gender (male/female) | 10:25 | |
| Age (years) | 68.7 ± 6.5 | |
| Examining sites | Healthy | Diseased |
| Number of PICF samples | 34 | 40 |
| PD (mm) | 2.32 ± 0.58 | 4.70 ± 1.36† |
| Gingival index | 0.0 ± 0.0 | 1.5 ± 0.5† |
| BOP-positive rate (%) | 0.0 ± 0.0 | 40.0 ± 15.2* |
| Bone loss rate (%) | 19.7 ± 9.8 | 42.7 ± 18.0† |