Table 4.
Incremental shuttle walking test: before and after CPAP treatment
|
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 |
P values represent comparisons between before and after CPAP in each corresponding group.
†P values represent comparisons with regards to the changes with CPAP treatment between overlap syndrome and pure COPD in each corresponding group.
IC inspiratory capacity.