| ICU | medical intensive care unit |
| APACHE | acute physiology and chronic health evaluation score |
| SOFA | sequential organ failure assessment score |
| SAPS2 | simplified acute physiology score |
| BMI | body mass index |
| CAD | coronary artery disease |
| COPD | chronic obstructive pulmonary disease |
| CRP | C-reactive protein |
| IL-6 | interleukin 6 |
| RRT | renal replacement therapy |
| GFR | glomerular filtration rate |
| AST | aspartate aminotransferase |
| BNP | brain natriuretic peptide |
| LDH | lactate dehydrogenase |
| FiO2 | inspiratory oxygen fraction |
| Pmax | maximum airway pressure |
| PEEP | positive end-expiratory pressure |
| OS | overall survival |
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