Table 2 Baseline characteristics by GOLD risk groups

Gender (M/F)*

125 / 22

255 / 59

35 / 5

272 / 55

0.632

Age

66 (8)

68 (9)

68 (9)

68 (9)

0.030

Pack-yr

50 (24)

55 (27)

51 (28)

60 (29)

0.006

Active smoking*

40%

38%

28%

25%

0.001

BMI (kg/m2)

27.9 (4.7)

28.7 (6.2)

27.6 (4.6)

27.9 (5.1)

0.155

6MWD m

474 (97)

450 (98)

428 (93)

400 (108)

<0.001

BODE index ^†

0 (0-2)

1 (0-4)

2 (0-7)

3 (0-7)

<0.001

Charlson index ^†

1 (0-5)

1 (0-5)

1 (0-4)

1 (0-5)

0.263

Inhaled anti cholinergic*

56%

68%

87%

88%

<0.001

Inhaled β2-agonist*

53%

68%

88%

90%

<0.001

Inhaled corticosteroid*

45%

55%

82%

83%

<0.001

Theophylline*

0.7%

5%

10%

17%

<0.001