Skip to main content

Table 4 Cephalometric norms of upper airway in Chinese subjects and gender differences

From: Cephalometric norms for the upper airway of 12-year-old Chinese children

Variables   Boys Girls Gender difference P value  
     Range 95% CI     Range 95% CI  
  Mean SD Median Min Max Lower Upper Mean SD Median Min Max Lower Upper  
Soft palate                  
PM-U Length of the soft palate 29.6 3.4 29.9 21.0 38.0 29.2 30.1 29.3 3.4 29.1 22.0 45.3 28.9 29.8 0.3 0.271  
SPT Soft palate thickness 8.3 1.2 8.3 4.1 11.9 8.2 8.5 8.0 1.4 7.9 2.8 12.7 7.8 8.2 0.3 0.008 **
NL/PM-U Inclination of the long axis of the soft palate relative to the nasal line 125.9 6.1 125.5 109.1 144.2 125.1 126.7 126.9 5.4 127.1 112.9 144.8 126.2 127.7 -1.0 0.058  
Depth of upper airway                  
PM-UPW Depth of the nasopharyngeal airway space 21.0 3.5 21.2 4.7 28.4 20.5 21.4 20.9 3.5 20.9 11.1 28.4 20.4 21.4 0.1 0.553  
U-MPW Depth of the retropalatal pharyngeal airway space 8.7 2.2 8.6 3.4 14.8 8.4 9.0 9.2 2.4 9.2 3.5 16.0 8.9 9.6 -0.6 0.011 *
V-LPW Depth of the hypopharyngeal airway space 13.4 3.0 13.9 5.0 19.9 13.0 13.8 14.5 3.1 14.7 5.2 23.2 14.1 15.0 -1.1 <0.001 ***
PASmin Depth of the retroglossal pharyngeal airway space 8.4 2.5 8.4 2.3 14.3 8.1 8.8 9.0 2.7 8.8 2.8 16.5 8.7 9.4 -0.6 0.034 *
Position of the hyoid bone                  
AH-FH Positon of the hyoid bone in the vertical plance 75.2 5.9 75.2 60.8 95.3 74.3 75.9 74.1 6.0 73.9 58.9 99.1 73.2 74.9 1.1 0.04  
AH-CV Positon of the hyoid bone in the horizontal plance 30.1 3.4 30.1 21.1 37.9 29.6 30.5 30.2 3.0 30.4 22.9 41.1 29.8 30.7 -0.2 0.775  
  1. *p < 0.05; **p < 0.01; ***p < 0.001.