Obstructive group

(%FEV₁ ≤ 70%, n = 22)

Non-obstructive group

(%FEV₁ > 70%, n = 33)

Actual postoperative values (apo-values)

COPD

(C-group, n = 22)

Tiotropium

Smoker

(S-group, n = 10)

Tiotropium

Non-smoker

(N-group, n = 23)

Control

p value

Mean ± SD

Mean ± SD

Mean ± SD

C-g vs S-g

C-g vs N-g

S-g vs N-g

apo-VC (L)

2.26 ± 0.50

2.91 ± 0.40

2.12 ± 0.55

0.3774

0.4153

0.3008

apo-FEV1 (L)

1.52 ± 0.31

1.59 ± 0.21

1.65 ± 0.46

0.3288

0.4992

0.2244

apo-VC% (predicted, %)

80.5 ± 14.6

102.6 ± 16.0

80.3 ± 15.9

0.2953

0.4068

0.4236

apo-FEV1/FVC (%)

67.7 ± 9.2

75.8 ± 7.1

77.7 ± 5.2

<0.0001

<0.0001

0.0017