Spearman's correlations for selected parameters with the change in dyspnoea intensity ratings at iso-time with hyperoxia versus room air
| r-value | p-value | |
| ΔEET min | −0.67 | 0.02 |
| FVC % pred | −0.43 | 0.18 |
| DLCO % pred | −0.11 | 0.75 |
| Peak incremental V′O2 % pred | 0.11 | 0.75 |
| ΔSpO2 at iso-time % | −0.04 | 0.91 |
| ΔSpO2 at peak exercise % | −0.06 | 0.86 |
| ΔV′E at iso-time L·min−1 | 0.14 | 0.68 |
| ΔVT at iso-time L | −0.46 | 0.16 |
| ΔFB at iso-time breaths·min−1 | 0.23 | 0.50 |
| ΔEELV at iso-time % TLC | 0.37 | 0.26 |
| ΔEILV at iso-time % TLC | 0.27 | 0.43 |
| ΔEMGdi at iso-time %max | 0.41 | 0.21 |
| ΔNMU at iso-time EMGdi (%max): VT (% VC) | 0.63 | 0.04 |
Δ: difference between selected parameter with hyperoxia versus room air; EET: exercise endurance time; FVC: forced vital capacity; DLCO: diffusing capacity of the lungs for carbon monoxide; V′O2: oxygen consumption; SpO2: arterial oxygen saturation measured by pulse oximetry; V′E: minute ventilation; VT: tidal volume; FB: breathing frequency; EELV: end-expiratory lung volume; TLC: total lung capacity; EILV: end-inspiratory lung volume; EMGdi: electromyography of the crural diaphragm; NMU: neuromechanical uncoupling; VC: vital capacity.