Standard clinical parameters and indices of neural respiratory drive on admission
| Emergency department | Baseline measurements | |
| MEWS | 3 (0–7) | 2 (0–4) |
| FEV1 (l) | – | 0.60±1.65 |
| FVC (l) | – | 1.53±0.82 |
| PaO2 (kPa) | 10.0±3.5 | – |
| PaCO2 (kPa) | 6.3±1.4 | – |
| EMGpara%max (%) | – | 20.3±9.9 |
| NRDI (AU) | – | 455±263 |
Data presented as median (range) and mean±SD.
EMGpara%max, EMGpara during tidal breathing normalised for maximum EMGpara produced during a sniff manoeuvre; FEV1, forced expiratory volume in 1 s; MEWS, medical early warning score; NRDI, neural respiratory drive index (RR × EMGpara%max); Paco2, arterial partial pressure of carbon dioxide; Pao2, arterial partial pressure of oxygen; RR, respiratory rate.