Table 1 Subject demographics

n

34

52

Age (years)

66(11)

68 (8)

0.3

Gender male:female

17:17

31:21

0.38

Smoking status current:ex

9:25

13:39

0.88

Smoking pack years

29(18)

39 (21)

0.017

FEV ₁ (L)

2.6(0.7)

1.5 (0.6)

<0.001

FEV ₁ % predicted (%)

99 (13)

59(20)

<0.001

FVC (L)

3.6(1.1)

3.1(1.0)

0.05

FVC % predicted (%)

109(16)

95 (20)

0.001

Oxygen saturations (%)

96(1)

95 (2)

0.001

Carbon monoxide (ppm)

9(10)

7(8)

0.47

CAT score

5(5)

17(10)

<0.001

SGRQ

7(7)

37(21)

<0.001

GOLD stage of airflow obstruction 1/2/3/4 (n)

0/0/0/0

5/33/10/4

BMI (kg/m ² )

27.0 (3.4)

26.3(4.8)

0.44

FFMI (kg/m ² ) n = 77

18.8 (2.3)

18.2 (2.5)

0.31

IHD (n)

2

9

0.12

Diabetes (n)

4

5

0.75