Cone-Beam Computed Tomography Analysis on the Relationship between the Mandibular Third Molar and the Position of the Mandibular Canal in Koreans from the Yanbian Area and the Han People

Table 2

Frequency analysis on Korean and Han nationalities by gender, location, and impaction type (n (%)).

	Korean nationality	Han nationality	χ^2/Fisher
Gender
Male	105 (50.5)	100 (46.9)	0.526	0.468
Female	103 (49.5)	113 (53.1)
Location
Left side	106 (51.0)	106 (49.8)	0.060	0.806
Right side	102 (49.0)	107 (50.2)
Impaction type
Vertical	34 (16.3)	42 (19.7)	0.809	0.368
Mesial	94 (45.2)	80 (37.6)	2.529	0.112
Horizontal	70 (33.7)	80 (37.6)	0.700	0.403
Buccal	1 (0.5)	5 (2.3)	—	0.216
Buccolingual	2 (1.0)	2 (0.9)	—	1.000
Distal	2 (1.0)	0 (0)	—	0.244
Inversion	5 (2.4)	4 (1.9)	—	0.749

Note. means statistical significance.