| 6-month group | 12-month group | 24-month group | Statistical test |
---|---|---|---|---|
Level of oral cleanlinessd (N = 307) |  |  |  | Kruskal- |
1 (Least clean) | 0 | 2 (2.0) | 3 (3.0) | Wallis Test |
2 | 9 (8.4) | 3 (3.0) | 12 (12.0) | Â |
3 | 42 (39.2) | 48 (48.0) | 55 (55.0) | P = 0.004 |
4 | 51 (47.7) | 43 (43.0) | 23 (25.0) | Â |
5 (Cleanest) | 5 (4.7) | 4 (4.0) | 5 (5.0) | Â |
'High’e level of oral cleanliness at follow-up (N = 307) |  |  |  | Χ2 test |
N (%) scoring 'High’ | 56 (52.3) | 47 (47.0) | 30 (30.0) | P = 0.003 |
Complete dataset analysis (N = 307) | ||||
Odds Ratio from Logistic regression | 1.00 | 0.95 | 0.40 | - |
(95% CI) for follow up adjusted for baseline high level of oral cleanliness | Â | (0.53, 1.70) | (0.22, 0.74) | Â |
Multiple imputation (ITT) analysis (N = 368) | ||||
Odds Ratio from Logistic regression | 1.00 | 0.94 | 0.39 | - |
(95% CI) for follow up adjusted for baseline high level of oral cleanliness | Â | (0.53, 1.66) | (0.21, 0.73) | Â |