Table 3.
Means, standard deviations, differences between means, and standard errors of the difference in the control and impacted groups by sex.
| Variable | Men: Control vs. Impacted |
Women: Control vs. Impacted |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Control (n = 89) |
Impacted (n = 68) |
Difference between means | Std error of difference | Control (n = 36) |
Impacted (n = 47) |
Difference between means | Std error of difference | |||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | |||||
| Condyle length (mm) | 17.41 | 3.26 | 16.78 | 3.09 | 0.63 | 0.38 | 18.04 | 2.95 | 15.34 | 2.77 | 2.69∗∗∗ | 0.46 |
| Coronoid length (mm) | 13.56 | 3.14 | 13.04 | 3.10 | 0.51 | 0.37 | 12.43 | 2.85 | 11.73 | 2.85 | 0.70 | 0.46 |
| Ramus height (mm) | 48.19 | 5.34 | 47.25 | 4.05 | 0.93 | 0.58 | 41.91 | 3.55 | 40.17 | 4.87 | 1.73∗ | 0.69 |
| Total ramus height (mm) | 60.20 | 5.48 | 57.70 | 5.33 | 2.49∗∗∗ | 0.65 | 54.03 | 4.17 | 49.91 | 4.97 | 4.11∗∗∗ | 0.74 |
| Ramal width (mm) | 29.39 | 3.35 | 28.68 | 2.93 | 0.71 | 0.38 | 28.40 | 3.77 | 26.57 | 2.94 | 1.82∗ | 0.54 |
| Mandibular body length (mm) | 89.23 | 7.73 | 89.59 | 6.37 | −0.36 | 0.86 | 87.86 | 6.89 | 84.65 | 8.17 | 3.2∗ | 1.23 |
| Sigmoid notch depth (mm) | 14.01 | 2.36 | 13.39 | 2.18 | 0.62∗ | 0.27 | 13.75 | 2.14 | 12.29 | 2.02 | 1.46∗∗∗ | 0.33 |
| Posterior ramus notch depth (mm) | 2.70 | 0.87 | 2.47 | 0.88 | 0.22∗ | 0.10 | 3.43 | 0.92 | 2.58 | 0.66 | 0.85∗∗∗ | 0.12 |
| Anterior ramus notch depth (mm) | 3.19 | 1.93 | 2.72 | 1.56 | 0.46∗ | 0.21 | 4.01 | 2.26 | 2.87 | 1.58 | 1.14∗∗∗ | 0.31 |
| Antegonial notch depth (mm) | 1.94 | 1.11 | 1.85 | 1.03 | 0.08 | 0.13 | 1.76 | 0.71 | 1.74 | 0.70 | 0.01 | 0.11 |
| Third molar width (mm) | 11.07 | 0.87 | 10.88 | 1.02 | 0.19 | 0.11 | 10.99 | 1.08 | 11.01 | 0.87 | −0.03 | 0.15 |
| Retromolar space (mm) | 11.81 | 3.12 | 9.34 | 3.30 | 2.46∗∗∗ | 0.38 | 8.21 | 3.33 | 6.61 | 3.09 | 1.59∗∗ | 0.51 |
| Retromolar space/third molar width ratio | 1.07 | 0.30 | 0.86 | 0.31 | 0.20∗∗∗ | 0.04 | 0.75 | 0.30 | 0.60 | 0.27 | 0.14∗∗ | 0.04 |
| Angle between condyle and coronoid process (deg) | 40.23 | 7.67 | 42.33 | 8.55 | −2.1∗ | 0.96 | 38.71 | 9.97 | 39.62 | 10.22 | −0.91 | 1.63 |
| Gonial angle (deg) | 122.67 | 7.67 | 124.13 | 7.81 | −1.45 | 0.92 | 124.61 | 6.17 | 127.37 | 8.51 | −2.76∗ | 1.22 |
| Inclination of lower posterior teeth (deg) | 76.97 | 6.36 | 75.30 | 6.28 | 1.6∗ | 0.75 | 92.45 | 5.28 | 95.64 | 6.92 | −3.19∗∗ | 1.00 |
| Angle of impaction (deg) | 66.67 | 9.62 | 28.67 | 20.41 | 37.9∗∗∗ | 1.77 | 86.08 | 8.62 | 53.86 | 16.98 | 32.21∗∗∗ | 2.22 |
n = number of subjects.
∗P<0.05, ∗∗P<0.01, ∗∗∗P<0.001.