Table 1 Patient characteristics

Age, yrs

60 ± 6

60 ± 8

0.929

 Male

5

30

 Female

2

11

FEV1, L

3.4 ± 1.0

1.6 ± 1.0

< 0.001

FEV1, % predicted

109 ± 21

50 ± 26

< 0.001

FEV1/FVC ratio

77 ± 4

41 ± 13

< 0.001

 I

8

 II

8

 III

12

 IV

13

 0

7

1

 1

10

 2

12

  ≥ 3

18

 Current smoker

14

 Ex-smoker

3

27

 Never smoker

4

BMI, kg/m2

24 ± 1.4

24 ± 3.3

0.790

hsCRP

3.8 ± 5.4

4.6 ± 6.9

0.765

Leukocyte count

6.2 ± 1.9

7.7 ± 1.8

0.052