Table 3.

- Comparisons of ethmoid infundibulum and natural ostium dimensions according to the presence and absence of multiple anatomical factors.

Anatomical variation	n (%)	EI width (mm)	EI length (mm)	MSNO (mm)
Deviated nasal septum
Yes	42 (21%)	2.28±0.66	8.12±1.56	3.08±0.67
No	158 (79)	2.34±0.54	8.05±1.56	3.13±0.77
Haller cells
Yes	41 (20.5)	2.21±0.64	8.84±1.56*	3.04±0.89
No	159 (79.5)	2.36±0.54	7.92±1.47	3.14±0.71
Accessory ostium of maxilla
Yes	40 (20)	2.40±0.56	7.75±1.62	3.48±0.77*
No	160 (80)	2.31±0.56	8.19±1.49	3.03±0.72
Concha bullosa
Yes	49 (24.5)	2.28±0.39	8.32±1.47	3.07±0.68
No	151 (75.5)	2.35±0.61	8.04±1.54	3.13±0.78

Values are presented as mean ± standard deviation. EI: ethmoid infundibulum, MSNO: maxillary sinus natural ostium