Start of SPT | Total | Teeth loss due to periodontal disease during SPT | HR | 95% CI | p value | ||
---|---|---|---|---|---|---|---|
Variables | n | Person-years | Rate | ||||
Age | |||||||
≤ 34 | 5 | 1 | 14.2 | 0.0706 | 1.00 | ||
35–44 | 20 | 3 | 101.5 | 0.0296 | 0.36 | 0.04–3.57 | 0.380 |
45–54 | 27 | 9 | 138.0 | 0.0652 | 0.76 | 0.09–6.33 | 0.796 |
55–64 | 24 | 2 | 122.4 | 0.0163 | 0.20 | 0.02–2.30 | 0.198 |
≥ 65 | 6 | 1 | 26.8 | 0.0373 | 0.46 | 0.03–7.51 | 0.586 |
Diabetes | |||||||
Non-DM | 80 | 16 | 398.1 | 0.0402 | 1.00 | ||
DM | 2 | 0 | 4.8 | 0.0000 | 0.05 | 0.00–6.27 × 107 | 0.777 |
Smoking history | |||||||
Non-smoker | 62 | 11 | 301.2 | 0.0365 | 1.00 | ||
Smoker | 20 | 5 | 101.8 | 0.0491 | 1.41 | 0.49–4.09 | 0.522 |
Number of sites with of PD ≥ 6 mm | |||||||
< 8 | 80 | 16 | 396.7 | 0.0403 | 1.00 | ||
≥ 8 | 2 | 0 | 6.3 | 0.0000 | 0.05 | 0.00–3.81 × 106 | 0.743 |
BOP | |||||||
< 25% | 69 | 13 | 356.9 | 0.0364 | 1.00 | ||
≥ 25% | 13 | 3 | 46.0 | 0.0652 | 2.31 | 0.61–8.82 | 0.219 |
Bone loss/age ratio | |||||||
< 1.0 | 25 | 4 | 116.9 | 0.0342 | 1.00 | ||
≥ 1.0 | 57 | 12 | 286.0 | 0.0420 | 1.21 | 0.39–3.76 | 0.742 |
Number of teeth lost | |||||||
< 8 | 66 | 10 | 335.1 | 0.0298 | 1.00 | ||
≥ 8 | 16 | 6 | 67.8 | 0.0885 | 2.86 | 1.02–8.01 | 0.046 |
MPRA | |||||||
Low risk | 27 | 1 | 153.7 | 0.0065 | 1.00 | ||
Moderate risk | 34 | 9 | 161.1 | 0.0559 | 8.73 | 1.10–69.09 | 0.040 |
High risk | 21 | 6 | 88.2 | 0.0681 | 11.04 | 1.31–93.37 | 0.027 |
TRP assessment | |||||||
Favorable | 61 | 8 | 296.6 | 0.0270 | 1.00 | ||
Poor | 21 | 8 | 106.3 | 0.0752 | 2.79 | 1.05–7.44 | 0.040 |