Controlled clinical trials of non-invasive ventilation (NIV) versus conventional therapy: 1 year survival
| n | Conventional | NIV | |
|---|---|---|---|
| *All intubated in the conventional control group. | |||
| Plant11 | 118 | 54% | 62% |
| Bardi35 | 15 | 53% | 87% |
| Confalonieri49 | 24 | 50% | 71% |
| Vitacca48 | 27/30 | 37%* | 70% |