Table 4.

Percentage and association of left and right anatomical variations and sinus involvement (Spearman’s correlation coefficient)

Normal variation	Side	Sinus
		Maxillary		Anterior ethmoid		Posterior ethmoid		Sphenoid		Frontal
		%	P	%	P	%	P	%	P	%	P
Septal deviation	Left	48	0.894	38	0.935	28	0.962	26	0.020*	23	0.114
	Right	50	0.801	46	0.722	32	0.941	21	0.736	22	0.686
Spur formation	Left	23	0.929	19	0.969	15	0.634	14	0.056	8	0.654
	Right	30	0.283	28	0.497	21	0.545	11	0.822	13	0.779
Concha bullosa	Left	16	0.476	13	0.845	9	0.907	7	0.733	5	0.760
	Right	22	0.469	17	0.763	12	0.818	10	0.302	10	0.233
Paradoxical middle concha	Left	9	0.006*	9	0.006*	8	0.054	5	0.253	4	0.871
	Right	6	0.000*	5	0.064	5	0.030*	4	0.034*	5	0.003*
Agger nasi cell	Left	38	0.340	32	0.359	24	0.856	19	0.640	16	0.919
	Right	37	0.026*	32	0.220	22	0.318	15	0.677	15	0.598
Haller cell	Left	6	0.095	6	0.076	4	0.688	5	0.016*	3	0.497
	Right	9	0.037*	8	0.172	7	0.175	5	0.221	6	0.151
Onodi cell	Left	12	0.947	10	0.665	8	0.691	7	0.197	5	0.839
	Right	26	0.310	21	0.837	16	0.830	11	0.624	12	0.462