Table 3.
Outcome sub-group analyses.
| Subgroup variables | < 7 hours | > 7 hours | p value |
|---|---|---|---|
| Altered mental status | |||
| Lung protective ventilation (%) | 62.6 | 90.9 | <0.001 |
| Any ventilator changes while in ED (%) | 30.7 | 9.1 | 0.005 |
| Mortality (%) | 26.0 | 30.0 | 0.711 |
| Mechanical ventilation duration (days) | 1.5 | 5.81 | 0.050 |
| ICU length of stay (days) | 3.79 | 7.40 | 0.442 |
| Hospital length of stay (days) | 10.65 | 13.58 | 0.431 |
| Trauma | |||
| Lung protective ventilation (%) | 68.3 | 66.7 | 0.898 |
| Any ventilator changes while in ED (%) | 26.0 | 22.2 | 0.736 |
| Mortality (%) | 15.2 | 43.8 | 0.046 |
| Mechanical ventilation duration (days) | 3.01 | 4.52 | 0.714 |
| ICU length of stay (days) | 6.98 | 6.77 | 0.972 |
| Hospital length of stay (days) | 16.0 | 8.7 | 0.039 |
| Respiratory failure | |||
| Lung protective ventilation (%) | 55.8 | 72.7 | 0.286 |
| Any ventilator changes while in ED (%) | 13.9 | 9.1 | 0.633 |
| Mortality (%) | 32.9 | 72.7 | 0.020 |
| Mechanical ventilation duration (days) | 3.29 | 2.70 | 0.880 |
| ICU length of stay (days) | 5.22 | 11.1 | 0.104 |
| Hospital length of stay (days) | 15.5 | 26.8 | 0.305 |
ED, emergency department; ICU, intensive care unit.