Table 2 The distribution of the preoperative variables in both groups

Age

 Mean ± SD

34.5 ± 11.7

37.3 ± 12.9

0.26

Sex

 Male

27

28

0.8

 Female

23

22

Smoking

 Smokers

19

22

 Passive smokers

15

10

0.7

 Nonsmokers

16

18

Exposure risk

 Factory

12

14

 Animals/birds

14

10

0.8

 Wool/wood

4

4

 Non

20

22

Preoperative SNOT-22

 Mean ± SD

49.8 ± 8.9

47.4 ± 7.5

0.5

 Preoperative Lund-Mackay CT score

 Mean ± SD

19.3 ± 2.7

19.5 ± 2.4

0.2

Preoperative Meltzer score

 Mean ± SD

7.2 ± 0.8

7 ± 0.9

0.4