Table 1 Patients characteristics in group I

Age (mean in years)

43.69 ± 13.39

41.29 ± 11.57

45.80 ± 14.62

0.146

Gender;

0.355

Male

47

20

27

Female

28

15

13

Post-BDR FEV1/FVC < 70%

< 0.001*

 Yes

40

0

40

 No

35

35

0

Onset after age of 40

11

6

5

0.571

History of smoking

35

14

21

0.279

Exposure to irritant

23

9

14

0.384

Duration of disease (median in years)

23.0

20.0

24.50

0.006*

Chronic mucus

18

7

11

0.448

Sputum neutrophils

0.037*

 < 57%

24

15

9

 ≥ 57%

7

1

6