Airway parameters without mandibular advancement splint (MAS) and with MAS (all patients; n=69)
| Without MAS | With MAS | p Value* | |
| Total airway volume (cm3) | 16.5±0.7 | 18.1±0.8 | 0.001 |
| Minimum cross-sectional area (cm2) | 0.49±0.04 | 0.57±0.03 | 0.031 |
| Airway length (cm) | 9.4±0.1 | 9.2±0.1 | 0.15 |
| Velopharynx | |||
| Volume (cm3) | 5.7±0.3 | 6.5±0.3 | <0.001 |
| Antero-posterior dimensions (cm) | 1.13±0.04 | 1.17±0.04 | 0.22 |
| Lateral dimensions (cm) | 1.67±0.07 | 1.91±0.07 | <0.001 |
| Oropharynx | |||
| Volume (cm3) | 3.7±0.2 | 3.9±0.2 | 0.24 |
| Antero-posterior dimensions (cm) | 1.22±0.04 | 1.27±0.04 | 0.13 |
| Lateral dimensions (cm) | 2.23±0.09 | 2.34±0.08 | 0.10 |
| Hypopharynx | |||
| Volume (cm3) | 7.1±0.4 | 7.7±0.4 | 0.017 |
| Antero-posterior dimensions (cm) | 1.37±0.05 | 1.47±0.05 | 0.023 |
| Lateral dimensions (cm) | 2.50±0.08 | 2.52±0.08 | 0.74 |
↵* Without MAS compared with with MAS.