Table 1 Baseline characteristics of the study population

Number of patients

20

36

-

Age(years old; range)

64.7 (39–76)

56.1 (23–74)

0.009

Female/male

5/15

11/25

N.S.

Atopic status(over class 2)

9/20

20/36

N.S.

Serum IgE(IU/ml)

424.5 (13–3767)

441.4 (8.6–3700)

N.S.

Peripheral blood eosinophil count(%)

3.0 (0.6–8.5)

8.5 (1.8–21.7)

<0.001

Bilateral lesion

10/20

35/36

<0.001

Nasal polyps

11/20

34/36

<0.001

Predoninant opacification of the ethmoid sinus

1/20

27/36

<0.001

Mean ethmoid score

1.23 (0–4)

3.02 (1–4)

<0.001

Mean frontal score

1.20 (0–3)

2.28 (0–4)

0.012

Comorbidity of Asthma

1/20

13/36

0.010

Comorbidity of otitis media

0/20

5/36

N.S.