Characteristics of hospitalised patients with COVID-19 at baseline (n=2199)
| Characteristics of admission | N with characteristic available | |
| Admission source, n (%) | ||
| Emergency department | 1558 (71) | 2199 |
| Other | 641 (29) | |
| Race, n (%) | ||
| White | 554 (25.2) | 2199 |
| Black or African-American | 543 (24.7) | |
| Asian | 74 (3.4) | |
| Pacific Islander | 25 (1.1) | |
| Other | 912 (41.5) | |
| Unknown | 91 (4.1) | |
| Ethnicity, n (%) | ||
| Hispanic/Latino | 576 (26.2) | 2199 |
| Non-Hispanic/Latino | 1305 (59.4) | |
| Unknown | 318 (14.5) | |
| Age, median (IQR) | 65 (54–76) | 2199 |
| Age groups, n (%) | ||
| 18–30 | 73 (3.3) | 2199 |
| 31–40 | 179 (8.1) | |
| 41–50 | 225 (10.2) | |
| 51–60 | 395 (18.0) | |
| 61–70 | 527 (24.0) | |
| 71–80 | 444 (20.2) | |
| 81–90 | 274 (12.5) | |
| 91 or older | 82 (3.7) | |
| Sex, n (%) | ||
| Male | 1293 (58.8) | 2199 |
| Female | 906 (41.2) | |
| Body mass index in kg/m2, median (IQR) | 28 (6) | 1316 |
| Medical history, n (%) | ||
| Atrial fibrillation | 156 (7.1) | 2199 |
| Asthma | 180 (8.2) | |
| Coronary artery disease | 343 (15.6) | |
| Cancer | 151 (6.9) | |
| Chronic kidney disease | 207 (9.4) | |
| Chronic obstructive pulmonary disease | 113 (5.1) | |
| Diabetes mellitus | 583 (26.5) | |
| Heart failure | 217 (9.9) | |
| Hypertension | 812 (37) | |
| Stroke | 153 (7) | |
| Vital signs at hospital admission | ||
| Heart rate in beats per min, median (IQR) | 95 (83–108) | 2181 |
| Number of patients >100 beats per min, n (%) | 857 (39) | |
| Temperature in °F, median (IQR) | 99 (98.2–100.4) | 2180 |
| Number of patients >100.4°F, n (%) | 1926 (88) | |
| Respiratory rate in breaths/min, median (IQR) | 20 (18–21) | |
| Systolic blood pressure in mm Hg, median (IQR) | 130 (116–145) | 2176 |
| Diastolic blood pressure in mm Hg, median (IQR) | 74 (65–82) | |
| Oxygen saturation, median (IQR) | 95 (92–97) | 2176 |
| Admission laboratory parameters, median (IQR) | ||
| White blood cell count in K/μL, median (IQR) | 7 (5.2–9.9) | 2029 |
| Number of patients >10, n (%) | 498 (25) | 2029 |
| Number of patients <4, n (%) | 224 (11) | 2029 |
| Lymphocyte count in K/μL, median (IQR) | 0.9 (0.7–1.3) | 1888 |
| Lymphocyte percentage, median (IQR) | 13.8 (8.5–20.5) | 1972 |
| Haemoglobin g/dL, median (IQR) | 131 (116–144) | 2031 |
| Platelet count in K/μL, median (IQR) | 195 (151–253) | 2028 |
| Prothrombin time in s, median (IQR) | 13.9 (13.2–15) | 937 |
| Activated partial thromboplastin time in s, median (IQR) | 32 (29–36.1) | 926 |
| Serum sodium in mEq/L, median (IQR) | 137 (134–140) | 2015 |
| Serum potassium in mEq/L, median (IQR) | 4.2 (3.9–4.6) | 2006 |
| Serum creatinine in mg/dL, median (IQR) | 1 (0.8–1.5) | 2018 |
| Aspartate aminotransferase in U/L, median (IQR) | 42 (30–70.5) | 1815 |
| Alanine aminotransferase in U/L, median (IQR) | 32 (19–56) | 1025 |
| Serum albumin in g/dL, median (IQR) | 3.2 (2.8–3.6) | 1848 |
| Venous lactate in mmol/L, median (IQR) | 1.5 (1.1–2) | 775 |
| Number of patients >1.5, n (%) | 392 (51) | 775 |
| Inflammatory markers | ||
| C reactive protein in mg/L, median (IQR) | 110 (57.8–196) | 1354 |
| Ferritin in ng/L, median (IQR) | 714 (324–1730) | 1324 |
| Procalcitonin in ng/mL, median (IQR) | 0.18 (0.08–0.57) | 1241 |
| Number of patients >0.49, n (%) | 344 (28) | 1241 |
| Number of patients <0.15, n (%) | 573 (46) | 1241 |
| Lactate dehydrogenase in U/L, median (IQR) | 416 (314–545) | 1290 |
| Creatine kinase in U/L, median (IQR) | 199 (97–565) | 502 |
| D-dimer in μg/mL, median (IQR) | 1.31 (0.74–2.44) | 1079 |
| Number of patients >2.0, n (%) | 352 (33) | 1079 |
| Required mechanical ventilation, n (%) | 446 (20) | 2199 |
Baseline values are defined as first values on hospitalisation. All continuous characteristics are in median (IQR) unless specified otherwise and all categorical characteristics are in number (percentage). The percentage is calculated with the number of patients who had the characteristic available as the denominator. For further clarity, the number in which that characteristic was available for is provided separately in adjacent column.