Table 1 Descriptive statistics and statistical comparisons (independent sample t tests) for the cephalometric variables and age at T1 (starting forms)
Maxillary splint headgear group (N = 28) | Cervical headgear group (N = 28) | Diff. | P | 95% confidence interval | ||||
|---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Lower | Upper | |||
Age (years) | 10.1 | 1.9 | 9.5 | 1.9 | 0.6 | 0.306 | − 0.5 | 1.6 |
Wits (mm) | 2.5 | 2.5 | 1.7 | 2.3 | 0.8 | 0.176 | − 0.4 | 2.2 |
Overjet (mm) | 7.0 | 2.0 | 6.2 | 1.8 | 0.8 | 0.101 | − 0.2 | 1.8 |
Molar relation (mm) | 1.0 | 1.6 | 1.4 | 1.3 | − 0.4 | 0.356 | − 1.2 | 0.4 |
Maxillary base (A point-OLp) (mm) | 72.0 | 5.0 | 71.2 | 3.0 | 0.8 | 0.514 | − 1.5 | 2.9 |
Mandibular base (pg-OLp) (mm) | 71.0 | 5.4 | 72.2 | 4.5 | − 1.2 | 0.358 | − 3.9 | 1.4 |
Condylar head (co-OLp) (mm) | 7.9 | 2.2 | 7.6 | 2.7 | 0.3 | 0.665 | − 1.1 | 1.6 |
Mandibular length (pg-OLp+co-OLp) (mm) | 78.9 | 5.7 | 79.8 | 4.6 | − 0.9 | 0.493 | − 3.7 | 1.8 |
Maxillary incisor (is-OLp) (mm) | 80.9 | 6.2 | 78.3 | 3.8 | 2.6 | 0.067 | − 0.2 | 5.3 |
Mandibular incisor (ii-OLp) (mm) | 73.9 | 5.8 | 72.1 | 3.6 | 1.8 | 0.184 | − 0.8 | 4.3 |
Maxillary molar (ms-OLp) (mm) | 49.8 | 4.8 | 48.3 | 3.1 | 1.5 | 0.169 | − 0.7 | 3.7 |
Mandibular molar (mi-OLp) (mm) | 48.8 | 5.5 | 46.9 | 3.9 | 1.9 | 0.144 | − 0.7 | 4.4 |
Overbite (mm) | 1.9 | 2.1 | 2.9 | 2.2 | − 1.0 | 0.074 | − 2.2 | 0.1 |
SN to Pal.Pl. (deg.) | 7.0 | 3.2 | 7.9 | 3.0 | − 0.9 | 0.304 | − 2.5 | 0.8 |
SN to Mand. Pl. (deg.) | 35.3 | 5.4 | 34.4 | 5.6 | 0.9 | 0.542 | − 2.0 | 3.8 |
Pal. Pl. to Mand. Pl. (deg.) | 28.3 | 4.4 | 26.5 | 5.7 | 1.8 | 0.198 | − 1.0 | 4.5 |