Table 1. Information about the profile and sinonasal surgical history ( n  = 28) .

	N	%	Mean	Variation	Standard Deviation
Gender
Male	17	60.71
Female	11	39.29
Age (years)			37.32	20 - 61	10.24
Number of reoperations			1.25	1 - 3	0.58
One reoperation	23	82.14
Two reoperations	3	10.72
Three reoperations	2	7.14
Interval between operations (years)*
Primary surgery/1st reoperation	24		5.66	1 - 17	4.68
1st reoperation/2nd reoperation	3		3.33	1 - 5	2.08
2nd reoperation/3th reoperation	1		2

Note: * For the time interval between operations, n  = 24.