Table 1.
Clinical characteristics of patients at baseline.
| Parameter | Median | Range | IQR | % |
|---|---|---|---|---|
| Age (years) | 72 | 48–82 | 64.25–76.75 | – |
| CCI | 3 | 0–5 | – | – |
| SAPS II | 41 | 19–55 | 33–50 | – |
| WBC count (× 109/L) | 8.69 | 2.15–20.5 | 6.8–10.68 | – |
| Creatinine (mg/dL) | 1.54 | 0.48–3.39 | 1.09–1.83 | – |
| BUN (mg/dL) | 13.3 | 3.9–32 | 8.3–15.2 | – |
| ALT (U/L) | 27 | 5–88 | 19–42 | – |
| AST (U/L) | 37 | 14–201 | 27–76 | – |
| PaO2/FiO2 ratio | 152 | 51–262 | 114–190 | |
| Orotracheal intubation | – | – | – | 100 |
| Previous NIV/CPAP | – | – | – | 76.2 |
IQR, interquartile range; CCI, Charlson comorbidity index; SAPS, Simplified Acute Physiology Score; WBC, white blood cell; BUN, blood urea nitrogen; ALT, alanine aminotransferase; AST, aspartate aminotransferase; NIV, non-invasive ventilation; CPAP, continuous positive airway pressure.