| ARDS | Acute Respiratory Distress Syndrome |
| CAM-ICU | Confusion Assessment Method for the Intensive Care Unit |
| CRP | C-reactive protein |
| ELISA | Enzyme-Linked Immunosorbent Assay |
| ICU | Intensive Care Unit |
| IL-6 | Interleukin 6 |
| IL-8 | Interleukin 8 |
| IL-10 | Interleukin 10 |
| NfL | Neurofilament Light Chain |
| PCT | Procalcitonin |
| PICS | Post-Intensive Care Syndrome |
| PICSQ | Post-Intensive Care Syndrome Questionnaire |
| SD | Standard Deviation |
| GFAP | Glial Fibrillary Acidic Protein |
| ANOVA | Analysis of Variance |
| CI | Confidence Interval |
| Q1 | First Quartile |
| Q3 | Third Quartile |
| Min | Minimum |
| Max | Maximum |
| ME | Median |
| HPA axis | Hypothalamic–Pituitary–Adrenal Axis |