Levels of neural respiratory drive at rest, at Borg score 1 and end-exercise in healthy individuals and patients with cystic fibrosis
| Healthy | Cystic fibrosis | p-value | |
| Rest | |||
| EMGdi % max | 7.5±2 | 18.5±7.5 | 0.001 |
| sEMGpara % max | 5.8±3 | 13.1±7 | 0.001 |
| Breathlessness threshold | |||
| EMGdi % max | 20.2±12 | 32.1±15 | 0.024 |
| sEMGpara % max | 18.9±8 | 29.2±15 | 0.040 |
| End-exercise | |||
| EMGdi % max | 75±18.5 | 71.2±5 | 0.550 |
| sEMGpara % max | 48.6±20 | 55.3±27 | 0.440 |
| Borg breathlessness score | 8 (7–9) | 7 (6–9) | 0.690 |
Data are presented as mean±sd or median (interquartile range), unless otherwise stated. EMGdi: electromyogram recorded from the diaphragm; % max: % of maximum; sEMGpara: electromyogram recorded using surface electrodes from the parasternal intercostal muscle.