Table 2. Prevalence of accessory septa according to group

	S+ (n=35)	S- (n=431)	p-value
Accessory septa (+)	27 (77.14%)	308 (71.46%)	0.083
Total number	31	325
Mean number	0.886	0.754

S+ : sphenoid sinuses with sphenoiditis, S- : sphenoid sinuses without sphenoiditis.