Table 1. Baseline characteristics of COVID-19 patients.
| all (n=1000) | age<60(n=473) | 60-74(n=359) | age≥75(n=168) | |
| Age, median (IQR), y | 61 (46,70) | 46 (34,53) | 67 (64,70)* | 80 (77,84)*# |
| Male (n, %) | 466 (46.6%) | 216 (45.7%) | 164 (45.7%) | 86 (51.2%) |
| Female (n, %) | 534 (53.4%) | 257 (54.3%) | 195 (54.3%) | 82 (48.8%) |
| Onset of symptom to admission, median (IQR), d | 10 (7,14) | 10 (7,14) | 11 (8,15)* | 10 (6,13)# |
| Initial symptoms, No. (%) | ||||
| Fever | 754 (75.4%) | 353 (74.6%) | 284 (79.1%) | 117 (69.6%)# |
| Symptoms of respiratory system | ||||
| Sore throat | 43 (4.3%) | 31 (6.6%) | 7 (1.9%)* | 5 (3%) |
| Cough | 597 (59.7%) | 290 (61.3%) | 202 (56.3%) | 105 (62.5%) |
| Expectoration | 190 (19%) | 81 (17.1%) | 65 (18.1%) | 44 (26.2%)*# |
| Chest tightness | 209 (20.9%) | 78 (16.5%) | 97 (27%)* | 34 (20.2%) |
| Chest pain | 19 (1.9%) | 9 (1.9%) | 7 (1.9%) | 3 (1.8%) |
| Dyspnea | 255 (25.5%) | 104 (22%) | 101 (28.1%)* | 50 (29.8%)* |
| Catarrhal symptoms | 20 (2%) | 12 (2.5%) | 5 (1.4%) | 3 (1.8%) |
| Neuromuscular symptoms | 388 (38.8%) | 199 (42.1%) | 127 (35.4%) | 62 (36.9%) |
| Fatigue | 335 (33.5%) | 172 (36.4%) | 111 (30.9%) | 52 (31%) |
| Dizziness | 33 (3.3%) | 15 (3.2%) | 10 (2.8%) | 8 (4.8%) |
| Headache | 32 (3.2%) | 19 (4%) | 7 (1.9%) | 6 (3.6%) |
| Lethargy | 10 (1%) | 6 (1.3%) | 0 (0%) | 4 (2.4%)# |
| Muscle ache | 66 (6.6%) | 42 (8.9%) | 18 (5%)* | 6 (3.6%)* |
| Digestive symptoms | ||||
| Anorexia | 134 (13.4%) | 61 (12.9%) | 49 (13.6%) | 24 (14.3%) |
| Nausea | 21 (2.1%) | 8 (1.7%) | 8 (2.2%) | 5 (3%) |
| Vomiting | 26 (2.6%) | 11 (2.3%) | 8 (2.2%) | 7 (4.2%) |
| Abdominal pain | 7 (0.7%) | 3 (0.6%) | 3 (0.8%) | 1 (0.6%) |
| Diarrhea | 100 (10%) | 48 (10.1%) | 35 (9.7%) | 17 (10.1%) |
The total number of patients with available data: n(<60)=473, n(60-74)=359, n(≥75)=168. * p<0.05 vs. <60 group. # p<0.05 vs. 60-74 group.