Table 5.
Variables associated with noninvasive ventilation success or failure.
| NIV success (n = 3) | NIV failure (n = 46) | |
|---|---|---|
| Prior duration of symptoms (days) | 3.6 ± 1.1 | 7.2 ± 3.8 |
| Age | 25 ± 10 | 42 ± 16 |
| APACHE II | 8 ± 3 | 17 ± 5 |
| PaO2/FIO2 | 225 ± 115 | 140 ± 96 |
| FIO2 | 0.35 ± 0.21 | 0.80 ± 0.22 |
| Arterial pH | 7.40 ± 0.03 | 7.31 ± 0.10 |
| PaCO2 | 39 ± 2.5 | 46 ± 14 |
| SOFA | 2.6 ± 2 | 5.1 ± 2.7 |
| LOSICU | 13 (4 to 22) | 16 (8 to 23) |
| LOSHOSPITAL | 16 (4 to 27) | 19 (12 to 32) |
LOSICU, Length of stay at the ICU, in days; LOSHOSPITAL, Length of stay at the hospital, in days; NIV, non-invasive ventilation. Due to the small number of patients that did not require intubation and mechanical ventilation (n = 3), statistical analysis was not performed.