N1

N2

% VC

% PE

Narrowing of the middle turbinate

596

745

63.40

55.03

Other mechanical sinonasal variants

271

296

25.19

25.02

Narrowing of the infundibular

117

123

10.47

10.80

Narrowing of the superior turbinate

11

11

0.94

1.02

Total

995

1175

100

91.87