Table 3.

Pearson's correlation coefficient (R) test in the linear distances and angles.

	Age	ANB	C2C4-SN angle	Palatal angle	NP	PS	UP	TS	EP	SPL	SPW	UE
Age	1	0.058	0.309∗	0.028	0.467∗	0.299∗	0.297∗	0.290∗	0.056	0.398∗	0.037	0.264∗
ANB	0.058	1	0.095	0.130	−0.047	−0.135	−0.118	−0.029	−0.178	0.084	−0.15	0.071
C2C4-SN angle	0.309∗	0.095	1	0.332∗	0.154	0.258∗	0.274∗	0.355∗	0.170	0.14	−0.300∗	0.319∗
Palatal angle	0.028	0.130	0.332∗	1	0.330∗	0.098	0.091	0.082	0.073	−0.065	−0.203	0.324∗
NP	0.467∗	−0.047	0.154	0.330∗	1	0.480∗	0.455∗	0.172	0.213∗	0.096	0.157	0.231∗
PS	0.299∗	−0.135	0.258∗	0.098	0.480∗	1	0.890∗	0.514∗	0.397∗	−0.300∗	−0.028	0.315∗
UP	0.297∗	−0.118	0.274∗	0.091	0.455∗	0.890∗	1	0.571∗	0.396∗	−0.367∗	−0.027	0.257∗
TS	0.290∗	−0.029	0.355∗	0.082	0.172	0.514∗	0.571∗	1	0.618∗	−0.098	−0.181	0.04
EP	0.056	−0.178	0.170	0.073	0.213∗	0.397∗	0.396∗	0.618∗	1	0	−0.093	−0.021
SPL	0.398∗	0.084	0.140	−0.065	0.096	−0.300∗	−0.367∗	−0.098	0.000	1	0.025	−0.052
SPW	0.037	−0.150	−0.300∗	−0.203	0.157	−0.028	−0.027	−0.181	−0.093	0.025	1	−0.293∗
UE	0.264∗	0.071	0.319∗	0.324∗	0.231∗	0.315∗	0.257∗	0.04	−0.021	−0.052	−0.293∗	1

NP: Nasopharyngeal airway; PS: shortest distance from the soft palate to the pharyngeal wall; UP: distance from the uvula to the pharyngeal wall.

TS: shortest distance from the posterior tongue to pharyngeal wall; EP: distance from the epiglottis to the pharyngeal wall.

SPL: Soft palate length; SPW: Soft palate width; UE: short distance from the uvula to the epiglottis.

∗: Statistically significant, P＜ 0.05.