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Table 4 Incremental shuttle walking test: before and after CPAP treatment

From: Nocturnal CPAP improves walking capacity in COPD patients with obstructive sleep apnoea

Variable

Overlap syndrome

COPD

 

n = 22

n = 22

Before

After

p

Before

After

p

†P

 

CPAP

CPAP

 

CPAP

CPAP

  

Distance (metre)

226.4 ± 95.3

288.6 ± 94.6

0.001

257.5 ± 89.1

272.5 ± 98.4

0.035

0.001

Borg scale (pre-exercise)

1.5 ± 1.5

0.8 ± 1.1

0.040

1.4 ± 1.3

0.7 ± 1.1

0.064

0.832

Borg scale (post-exercise)

4.9 ± 0.9

4.8 ± 1.1

0.851

5.0 ± 1.1

4.7 ± 1.2

0.450

0.596

SaO2 (pre-exercise)

94.5 ± 2.2

95.5 ± 1.9

0.014

94.6 ± 2.7

95.3 ± 2.2

0.046

0.351

SaO2 (post-exercise)

88.8 ± 4.4

87.8 ± 6.3

0.827

85.1 ± 6.0

84.6 ± 5.7

0.717

0.972

Heart rate (pre-exercise)

94.3 ± 17.7

87.3 ± 15.8

0.009

93.2 ± 15.6

93.4 ± 16.1

0.999

0.026

Heart rate (post-exercise)

136.3 ± 24.2

125.0 ± 22.8

0.018

125.3 ± 29.3

134.8 ± 29.6

0.135

0.010

Delta-IC (L)

−0.04 ± 0.23

−0.08 ± 0.17

0.489

−0.13 ± 0.21

−0.12 ± 0.24

0.979

0.548

IC pre-exercise (L)

1.37 ± 0.48

1.44 ± 0.48

0.184

1.34 ± 0.42

1.32 ± 0.42

0.687

0.171

IC post-exercise (L)

1.33 ± 0.48

1.36 ± 0.46

0.586

1.21 ± 0.42

1.20 ± 0.49

0.672

0.225

  1. P values represent comparisons between before and after CPAP in each corresponding group.
  2. †P values represent comparisons with regards to the changes with CPAP treatment between overlap syndrome and pure COPD in each corresponding group.
  3. IC inspiratory capacity.
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Respiratory Research

ISSN: 1465-993X

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