Table 2 Baseline characteristics

Male [%(n)]

81.3 (13)

50.0 (6)

0.11

Smoking history [mean ± SD]

Smoking (pack-years)

71.2 ± 24.1

40.1 ± 15.5

<0.001

Years since quitting smoking

8.9 ± 8.0

21.2 ± 9.0

<0.001

Spirometry [mean ± SD]

FEV1 (L)

1.1 ± 0.5

2.5 ± 0.4

<0.001

FVC (L)

3.0 ± 0.9

3.4 ± 0.7

0.18

FEV1/FVC %

38.7 ± 11.4

74.7 ± 8.1

<0.001

FEV1 % predicted

39.1 ± 16.6

86.5 ± 9.1

<0.001

FVC % predicted

74.6 ± 17.1

90.8 ± 12.5

<0.001

Inhaled Medications [%(n)]

Taking inhaled corticosteroid

81.3 (13)

0

<0.001

Taking inhaled long acting anticholinergic

75.0 (12)

7.7 (1)

<0.001

Taking inhaled long acting beta agonist

81.3 (13)

0

<0.001

Taking inhaled short acting beta agonist

81.3 (13)

0

<0.001