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Total and Respiratory adverse events
| Early NIV | Standard NIV | P | |
| R. events, n | 12 | 24 | 0.34* |
| R. patients, n (%) | 7 (35) | 15 (68) | 0.065** |
| Severity, n (%): | |||
| Mild/Moderate | 10 (83) | 15 (62) | |
| Severe | 2 (17) | 9 (38) | 0.07** |
*Chi2; **Fisher; R. events: number of total respiratory events; R. patients: number of patients with respiratory events.
