Table 1 .
Baseline patient characteristics in the derivation and validation samples
| Patients characteristics | Derivation samples (n = 79) | Validation samples (n = 40) |
|---|---|---|
| Age (min–max, mean) | 31–91 (66.8) | 44–93 (71) |
| Male sex (%) | 54 (68%) | 26 (65%) |
| Hypertension (%) | 56 (70%) | 19 (48%) |
| Temperature > 37.5 (%) | 65 (82%) | 31 (78%) |
| Pulmonary pattern “Wet” (%) | 28 (35%) | 18 (45%) |
| Respiratory rate (min–max, mean, median) | 15–48 (26;24) | 18–37 (24;24) |
| Arterial oxygen saturation (min–max, mean, median) | 63–96 (88;88) | 70–98 (90;91) |
| Absolute white blood cell count (103/mm3) (min–max, mean, median) | 1.1–16.1 (8.06;7.06) | 3.21–21 (8,1;6,6) |
| CRP (mg/dL) (min–max, mean, median) | 0.1–41 (12.8;11) | 0.16–31.5 (12;10,5) |
| LDH (U/L) (min–max, mean, median) | 87–1602 (504;420) | 173–1340 (418;369) |
| BMI (kg/m2) (min–max, mean, median) | 18.4–37 (26;26) | 18–42 (27;26) |
| P/F Ratio (min–max, mean, median) | 50–460 (243;252) | 98–453 (272;284) |
| Lactates > 20 mg/dL (min–max, mean, median) | 2.3–47.7 (13.78;11) | 5–32 (13;11) |
P/F ratio, the arterial oxygen pressure divided by the FIO2 (the fraction of inspired oxygen expressed as a decimal). CRP C-reactive protein, LDH lactate dehydrogenase, BMI body mass index