Table 1 Descriptive characteristics of patients affected by unwanted tooth movements (study group) and nonaffected patients (control group)
From: 3D-analysis of unwanted tooth movements despite bonded orthodontic retainers: a pilot study
|  | Study group (n = 44) | Control group (n = 43) | p-value | ||
|---|---|---|---|---|---|
n | % | n | % | ||
Female | 28 | 63.6 | 24 | 55.8 | 0.457 |
Male | 16 | 36.4 | 19 | 44.2 | 0.457 |
Angle class I | 22 | 50.0 | 21 | 48.8 | 0.914 |
Angle class II | 20 | 45.5 | 17 | 39.5 | 0.577 |
Angle class III | 2 | 4.5 | 5 | 11.7 | 0.225 |
Extractions | 15 | 34.1 | 13 | 30.2 | 0.700 |
| Â | Mean (yrs) | SD | Mean (yrs) | SD | Â |
|---|---|---|---|---|---|
Age at T0 | 12.68 | 2.11 | 14.36 | 5.60 | 0.136 |
Age at T1 | 15.44 | 2.20 | 16.97 | 5.61 | 0.327 |
Age at T2 | 17.32 | 2.74 | 19.13 | 5.58 | 0.231 |
Treatment duration | 2.73 | 0.70 | 2.61 | 0.82 | 0.236 |
Retention phase | 1.89 | 1.57 | 2.15 | 0.41 | 0.706 |