Table 4.
Cox regression analysis of mortality in the first 21 ventilator days across the different diagnostic categories in multivariate analysis
| Diagnostic categories | HR a (95% CI) | P value |
|---|---|---|
| Seizure disorder | 0.11 (0.02-0.81) | 0.030 |
| Renal/Metabolic | 0.37 (0.12-1.16) | 0.089 |
| CHF | 0.65 (0.36-1.18) | 0.154 |
| COPD | 0.65 (0.36-1.18) | 0.158 |
| Neurologic (NOS) | 0.88 (0.47-1.62) | 0.671 |
| Aspirations pneumonia/poisoning/toxicity | 0.90 (0.39-2.03) | 0.790 |
| CAD | 0.94 (0.59-1.50) | 0.781 |
| Respiratory infection | 1 (reference) | |
| ICH/SAH/SDH | 1.31 (0.94-1.84) | 0.112 |
| Drug overdose | 1.41 (0.35-5.72) | 0.632 |
| Respiratory (NOS) | 1.45 (0.80-2.61) | 0.219 |
| Else | 1.55 (0.91-2.64) | 0.108 |
| Neoplasm | 1.57 (0.76-3.21) | 0.222 |
| Sepsis | 1.74 (1.40-2.17) | <0.001 |
| Post-cardiac arrest | 2.06 (1.43-2.96) | <0.001 |
| Gastrointestinal bleeding | 2.88 (1.69-4.92) | <0.001 |
aDerived from multivariate Cox regression; had adjusted sex, ICU waiting time, APACHE II score, triage level. HR, hazard ratio; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; NOS, not otherwise specified; CAD, coronary artery disease; ICH/SAH/SDH, intracerebral hemorrhage/subarachnoid hemorrhage/subdural hemorrhage.