Table 6.

Airway changes and anterior movement stratified by index versus secondary surgery

Characteristic	Index surgery (n = 41)	Secondary surgery (n = 4)	p
Total airway volumetric increase (%)	123.2 (56.0–174.9)	20.5 (112.4–140.0)	0.010*
Nasal airway volumetric increase (%)	119.5 (44.8–196.1)	44.0 (132.0–162.7)	0.150*
Pharyngeal airway volumetric increase (%)	93.3 (39.7–148.3)	− 26.2 (− 45.1–0.01)	0.001*
Movement of anterior nasal spine
Magnitude (mm)	20 (14–23)	12 (− 5–15)	0.058*
Horizontal (mm)	20 (15–23)	12 (− 4–16)	0.058*
Vertical (mm)	1 (− 1–3)	− 3 (− 7–1)	0.023*

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