Table 2.
Clinical, laboratory, and diagnostic imaging findings upon admission.
| Variable | Absolute frequency (%). *Median [Interquartile range] |
N |
|---|---|---|
| Clinical presentation | ||
| Fever or low-grade fever | 15081 | |
| None | 2388 (15.8%) | |
| Low-grade fever (<38 °C) | 3131 (20.8%) | |
| Fever (> = 38 °C) | 9562 (63.4%) | |
| Cough | 15079 | |
| No | 3997 (26.5%) | |
| Yes, dry | 8751 (58%) | |
| Yes, with expectoration | 2331 (15.5%) | |
| Fatigue | 6507 (43.6%) | 14915 |
| Diarrhea | 3554 (23.7%) | 14991 |
| Anorexia | 2915 (19.6%) | 14845 |
| Shortness of breath | 8684 (57.6%) | 15067 |
| Anosmia | 1040 (7.1%) | 14710 |
| Physical Examination | ||
| Oxygen saturation (pulse oximetry, %) | 94 [91;97] | 14705 |
| <90 | 2628 (17.9%) | |
| ≥ 90 | 12077 (82.1%) | |
| Oxygen saturation/FiO2 ratio (%) | 442.9 [404.8;457.1] * | 14411 |
| Temperature, ºC | 37 [36.3;37.8] * | 14646 |
| <37 °C | 7026 (48%) | |
| 37-37.9 °C | 4520 (30.9%) | |
| ≥ 38 °C | 3100 (21.2%) | |
| Hypotension (systolic blood pressure <100 mmHg) | 907 (6.3%) | 14464 |
| Tachycardia (>100 beats per minute) | 3751 (24.8%) | 15140 |
| Tachypnea (>20 breaths per minute) | 4590 (31.1%) | 14769 |
| Confusion | 1803 (12%) | 14992 |
| Crackles | 7854 (53.2%) | 14754 |
| Chest x-ray | 14949 | |
| No pulmonary infiltrates | 1973 (13.2%) | |
| Unilateral pulmonary infiltrates | 3058 (20.5%) | |
| Bilateral pulmonary infiltrates | 9918 (66.3%) | |
| Complete blood count | ||
| White blood cell count, (x106/L) | 6300 [4780;8520] * | 15015 |
| Absolute count (x106/L) | ||
| Neutrophils | 4600 [3200;6700] * | 14944 |
| Lymphocytes | 940 [690;1300] * | 14990 |
| >1200 | 4818 (32.1%) | |
| 1000-1200 | 2249 (15%) | |
| 800-1000 | 2729 (18.2%) | |
| <800 | 5194 (34.6%) | |
| Eosinophils | 0 [0;20] * | 14786 |
| Monocytes | 400 [300;600] * | 14866 |
| Hemoglobin (g/dL) | 13.9 [12.6;15] * | 15016 |
| Platelets (x106/L) | 190000 [148000;247000] * | 15012 |
| Arterial Blood Gases | ||
| pH | 7.5 [7.4;7.5] * | 7764 |
| PCO2 (mmHg) | 34 [30.7;39] * | 7851 |
| PO2 (mmHg) | 66 [56;77.6] * | 7509 |
| pO2/FiO2 ratio (%) | 288.6 [233.3;342.9] * | 7203 |
| Basic metabolic panel | ||
| Glucose (mg/dL) | 112 [98;136] * | 14547 |
| Serum creatinine (mg/dL) | 0.9 [0.7;1.2] * | 14977 |
| Urea (mg/dL) | 37 [27;55] * | 12095 |
| Lactate dehydrogenase (U/L) | 321 [246;432] * | 13053 |
| <250 | 3410 (26.1%) | |
| 250-400 | 5634 (43.2%) | |
| >400 | 4009 (30.7%) | |
| Aspartate aminotransferase (U/L) | 35 [25;52] * | 11974 |
| Alanine aminotransferase (U/L) | 29 [19;46] * | 14145 |
| C-reactive protein (mg/L) | 60.2 [19;127.9] * | 14483 |
| Lactate (mmol/L) | 1.6 [1.1;2.4] * | 6824 |
| Procalcitonin (ng/mL) | 0.1 [0.1;0.2] * | 7159 |
| Interleukin-6 (IL-6) (pg/mL) | 29.8 [11.5;65.4] * | 1993 |
| D-dimer (ng/mL) | 11749 | |
| < 500 | 4251 (36.2%) | |
| 500-1000 | 3610 (30.7%) | |
| > 1000 | 3888 (33.1%) | |
| Serum ferritin (μg/L) | 5978 | |
| <300 | 1584 (26.5%) | |
| 300-650 | 1583 (26.5%) | |
| >650 | 2811 (47%) | |
| qSOFA index | 0 [0;1] * | 14129 |
| Low risk ≥1 | 12817 (90.7%) | |
| High risk ≥2 | 1312 (9.3%) | |