| Total | The severity of OSA | P | |
---|---|---|---|---|
Moderate | Severe | |||
Cross-sectional area (cm3) | Â | Â | Â | Â |
 The narrowest area | 32.47±20.16 | 29.65±8.14 | 32.94±21.55 | > 0.05 |
  Nasopharynx | 86.19±55.76 | 84.11±38.56 | 86.54±58.49 | > 0.05 |
  Oropharynx | 160.41±72.26 | 159.53±60.97 | 160.56±74.63 | > 0.05 |
Length (cm) | Â | Â | Â | Â |
 PNS-Hy | 81.53±7.33 | 79.21±5.58 | 81.92±7.57 | > 0.05 |
  PNS-SPt | 40.12±6.14 | 42.56±6.27 | 39.71±6.10 | > 0.05 |
  Pharynx | 57.53±7.61 | 59.42±6.70 | 57.22±7.78 | > 0.05 |
  Velopharynx | 34.73±5.61 | 36.57±7.63 | 42.04±7.34 | > 0.05 |
  Oropharynx | 45.50±9.47 | 42.04±7.34 | 46.08±9.74 | > 0.05 |
The angle of tongue base (°) | 57.86±6.59 | 56.30±6.91 | 58.12±6.58 | > 0.05 |