Table 4.

Airway changes stratified by syndrome type

	Magnitude of anterior advancement	Horizontal anterior advancement	Vertical anterior advancement
Total airway changes per mm advanced ($\frac{m{m}^3}{\mathit{mm}}$)	545 (368–902)	530 (318–840)	1391 (− 3399–4732)
Nasal airway changes per mm advanced ($\frac{m{m}^3}{\mathit{mm}}$)	348 (216–646)	320 (197–587)	170 (95–282)
Pharyngeal airway changes per mm advanced ($\frac{m{m}^3}{\mathit{mm}}$)	170 (95–282)	185 (94–299)	434 (− 1027–1645)

^*The Mann–Whitney U test for non-parametric data, two tailed, p < 0.05 is considered statistically significant

^**p-values are from the Kruskal–Wallis test for non-parametric data, p < 0.05 is considered statistically significant