Table 3 Comparison of the MIA and IMPA among the low-angle, normal-angle, and high-angle groups and comparison of the MIA and IMPA between sexes
From: Inclination of mandibular incisors and symphysis in severe skeletal class III malocclusion
Low-angle group | Normal-angle group | High-angle group | ANOVA test P value | Male | Female | Independent-samples t test P value | |
|---|---|---|---|---|---|---|---|
n = 29 (L) | n = 104 (N) | n = 65 (H) | n = 99(M) | n = 99(F) | |||
Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | Mean ± SD | |||
MIA(°) | 3.70 ± 5.26 | 3.52 ± 5.61 | 2.33 ± 5.97 | 0.360 | 75.63 ± 8.73 | 75.84 ± 7.12 | 0.853 |
IMPA(°) | 80.78 ± 7.04 | 75.51 ± 7.67 | 73.85 ± 7.92 | 0.001 L vs. N 0.000 L vs. H 0.170 N vs. H (LSD P value) | 2.92 ± 5.83 | 3.39 ± 5.56 | 0.571 |