Spearman coefficient | p-value | |
EMG_{di%max} | 0.98 (0.94–0.99) | 0.0001 |
EMG_{di%max}/V_{T}%VCpred | 0.94 (0.84–0.99) | 0.005 |
V′_{E} | 0.96 (0.93–0.99) | 0.003 |
V_{T}%VCpred | 0.90 (0.67–0.96) | 0.01 |
Date are presented as mean (IQR), unless otherwise stated. EMG_{di%max}: mean root mean square (RMS) diaphragm electromyogram (EMG_{di}) activity per breath, expressed as a percentage of maximum RMS EMG_{di} recorded during maximal inspiratory manoeuvres; V_{T}%VCpred: tidal volume expressed as a percentage of predicted vital capacity; V′_{E}: minute ventilation.