Mortality data
| 2012–2013 cohort* | 2017–2018 cohort† | P value | |
| In-hospital mortality, n (%) | 41 (40.5) | 11 (13.8) | <0.001 |
| 30-day mortality, n (%) | 47 (46.5) | 19 (23.8) | 0.002 |
| 1-year mortality, n (%) | 61 (60.4) | 32 (40.0) | 0.006 |
*Low IPAP regime.
†High IPAP regime.
IPAP, inspiratory positive airway pressure.