Table 2.
Cardiopulmonary Exercise Test Responses
| All CPX Instances (n=68) |
Stage C (n=54) |
Stage D (n=14) |
p-Value | |
|---|---|---|---|---|
| Peak VO2, ml.kg−1.min−1 | 15.58±4.82 | 17.21±3.92 | 9.32±1.93 | <0.001 |
| Percent predicted peak VO2, % | 58±21 | 63±20 | 37±9 | <0.001 |
| VE/VCO2 slope | 33.35±6.65 | 32.44±6.48 | 36.82±6.34 | 0.04 |
| VO2 at AT, ml.kg−1.min−1 | 11.79±3.95 (62*) | 12.92±3.33 (50*) | 7.08±2.69 (12*) | <0.001 |
| Peak oxygen pulse, ml.beat−1 | 12.02±3.68 | 12.91±3.47 | 8.59±2.24 | <0.001 |
| Peak respiratory exchange ratio | 1.05±0.12 | 1.07±0.11 | 0.96±0.12 | 0.002 |
| Exercise duration, s | 672±235 | 743±200 | 401±148 | <0.001 |
| Peak heart rate, beats.min−1 | 120.06±23.8 | 124.57±22.79 | 102.64±19.77 | 0.002 |
Values shown are mean±SD. Statistical significance between stage C and stage D subjects in values, where applicable, was evaluated using an unpaired t test
*
Number of CPX instances with detectable AT points, Modified V-slope method was used to detect the AT points.