Table 4.
Impact Of Peak Oxygen Pulse (O2P) On Ventilatory Parameters
| All (N = 79) | Group 1 (n = 37) | Group 2 (n = 42) | p-value | |
|---|---|---|---|---|
| FVC (L) | 2.21 ± 0.69 | 2.25 ± 0.71 | 2.18 ± 0.67 | 0.650 |
| FVC (% predicted) | 80.0 ± 19.0 | 84.2 ± 19.0 | 76.3 ± 18.4 | 0.065 |
| FEV1 (L/s) | 1.04 ± 0.42 | 1.18 ± 0.47 | 0.91 ± 0.32 | 0.003 |
| FEV1 (% predicted) | 47.9 ± 16.0 | 56.3 ± 15.9 | 40.5 ± 12.0 | <0.001 |
| FEV1/FVC | 0.47 ± 0.11 | 0.53 ± 0.09 | 0.42 ± 0.10 | <0.001 |
| MIP (cm H2O) | 65.1 ± 26.1 | 64.8 ± 23.6 | 65.3 ± 28.4 | 0.934 |
| MIP (% predicted) | 65.8 ± 25.7 | 67.7 ± 25.4 | 64.1 ± 26.1 | 0.538 |
| MEP (cm H2O) | 109.6 ± 38.1 | 108.8 ± 27.7 | 110.3 ± 45.6 | 0.866 |
| MEP (% predicted) | 59.7 ± 20.6 | 61.7 ± 18.5 | 57.9 ± 22.3 | 0.412 |
| VE rest (L/min) | 12.1 ± 3.1 | 12.3 ± 3.1 | 11.9 ± 3.1 | 0.574 |
| VE peak (L/min) | 32.3 ± 10.3 | 36.2 ± 9.7 | 28.8 ± 9.6 | 0.001 |
| RR rest (breath/min) | 19.1 ± 4.6 | 19.4 ± 4.2 | 18.9 ± 5.0 | 0.654 |
| RR peak (breath/min) | 32.3 ± 7.4 | 34.0 ± 6.5 | 30.8 ± 7.8 | 0.056 |
| VT rest (mL) | 652.8 ± 159.4 | 650.7 ± 146.2 | 654.6 ± 171.9 | 0.913 |
| VT peak (mL) | 1020.0 ± 306.6 | 1091.9 ± 326.3 | 956.7 ± 276.8 | 0.05 |
| VE/VCO2 at AT | 37.0 ± 6.1 | 35.4 ± 6.4 | 38.4 ± 5.6 | 0.029 |
| SpO2 rest (%) | 95.9 ± 2.0 | 96.2 ± 1.9 | 95.7 ± 2.1 | 0.252 |
| SpO2 peak (%) | 92.9 ± 3.6 | 93.5 ± 3.3 | 92.4 ± 3.8 | 0.171 |
| PETCO2 rest (mmHg) | 35.2 ± 5.5 | 35.6 ± 5.6 | 35.0 ± 5.4 | 0.648 |
| PETCO2 peak (mmHg) | 41.0 ± 7.1 | 41.2 ± 7.9 | 40.8 ± 6.4 | 0.778 |
Note: Data are presented as mean ± standard deviation.
Abbreviations: FEV1, forced expiratory volume in one second; FVC, forced vital capacity; MIP, maximal inspiratory pressure; MEP, maximal expiratory pressure; VE, minute ventilation; RR, respiratory rate; VT, tidal volume; VCO2, carbon dioxide production; SpO2, arterial oxygen hemoglobin saturation; PETCO2, partial pressure of carbon dioxide at the end of exhaled breath.