Table 2.
Clinical parameters (mean ± SD) for target sites in early and late orthodontic treatment (OT) group at baseline, 12 months and 24 months. Differences between follow-up visits in CAL or PPD after 24 months (secondary outcome) were tested by paired t-test.
| Variable | Early OT (n = 23) | Late OT (n = 20) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Baseline | 12 mo | 24 mo | BL vs. 24 mo | Baseline | 12 mo | 24 mo | BL vs. 24 mo | ||
| CAL (mean ± SD) | mm | 9.8 ± 2.5 | 4.4 ± 1.7 | 3.9 ±1.9 | p <0.0001 | 9.2 ± 2.5 | 4.7 ± 2.4 | 4.50 ± 2.19 | p < 0.0001 |
| Estimate | 95% CI | [8.8, 10.9] | [3.7, 5.2] | [3.1, 4.7] | [5.0, 6.7] | [8.0, 10.4] | [3.6, 5.8] | [3.5, 5.5] | [3.9, 5.5] |
| PPD (mean ± SD) | mm | 7.3 ± 1.6 | 3.1 ± 0.9 | 2.9 ± 0.9 | p < 0.0001 | 7.1 ± 1.7 | 3.2 ± 1.1 | 3.2 ± 0.9 | p < 0.0001 |
| Estimate | 95% CI | [6.6, 8.0] | [2.7, 3.5] | [2.5, 3.3] | [3.7, 5.1] | [6.3, 7.9] | [2.7, 3.7] | [2.7, 3.6] | [3.1, 5.4] |
| PI | n (%) | 4 (17%) | 3 (13%) | 2 (8%) | 1 (5%) | 2 (10%) | 2 (10%) | ||
| BOP | n (%) | 13 (53%) | 7 (30%) | 4 (17%) | 9 (45%) | 3 (15%) | 0 (0%) | ||
| PUS | n (%) | 1 | 0 | 0 | 2 | 0 | 0 | ||
| Pocket closure (PPD ≤ 4 mm) | n (%) | n/a | 21 (91%) | 21 (91%) | n/a | 17 (85%) | 18 (90%) | ||
| Pocket closure (PPD ≤ 4 mm, no BOP) | n (%) | n/a | 16 (69%) | 18 (78%) | n/a | 15 (75%) | 15 (75%) | ||
BL: Baseline, CAL: Clinical Attachment Level, PPD: Probing Pocket Depth, PI: Plaque Index, BOP: Bleeding on Probing, PUS: Suppuration, CI: Confidence Interval.