Table 5.
Differences between subgroups according PaO 2 /FIO 2 ratio at 3 h after surgery in a multivariate analysis
| Hazard ratio (95% CI) | P value | |
|---|---|---|
| PaO2/FIO2ratio > 241 subgroup vs. PaO2/FIO2ratio 202–241 subgroup | ||
| Preoperative haematocrit (%) | 1.080 (1.054 - 1.108) | <0.001 |
| Tracheal reintubation | 5.338 (1.938 – 14.707) | 0.001 |
| ICU stay (days) | 1.972 (1.959 - 1.985) | <0.001 |
| In-ICU exitus | 1.348 (1.185 - 1.654) | 0.001 |
| PaO2/FIO2ratio > 241 subgroup vs. PaO2/FIO2ratio < 202 subgroup | ||
| Acute pulmonary edema | 1.636 (1.418 - 1.968) | 0.035 |
| Tracheal reintubation | 2.649 (1.147 - 6.116) | 0.022 |
| Need of tracheostomy | 2.121 (1.015 - 4.432) | 0.046 |
| ICU stay (days) | 1.961 (1.951 - 1.971) | <0.001 |
| In-ICU exitus | 1.332 (1.206 - 1.536) | <0.001 |
| PaO2/FIO2ratio 202–241 subgroup vs. PaO2/FIO2ratio < 202 subgroup | ||
| Chronic obstructive pulmonary disease | 1.031 (1.006 - 1.056) | 0.015 |
| Chronic renal failure | 1.847 (1.371 - 2.207) | 0.005 |
| Need of tracheostomy | 2.371 (1.301 - 4.322) | 0.005 |
| ICU stay (days) | 1.489 (1.319 - 1.602) | <0.001 |
| In-ICU exitus | 1.190 (1.078 - 1.459) | <0.001 |