Table 1. Patient characteristics.
| Total (n = 571) | Mild (n = 221) | Severe (n = 350) | |
| Age (year) | 2.58±1.80 | 3.64±1.70 | 1.87±1.98 |
| Gender (Male/Female) | 351/220 | 151/70 | 200/150 |
| Weight (kg) | 14.06±6.60 | 18.11±7.89 | 12.56±8.86 |
| RR (/min) | 28.14±5.63 | 26.10±6.13 | 32.01±6.76 |
| Temperature (°C) | 37.67±0.92 | 36.54±0.77 | 38.23±0.78 |
| Pulse (/min) | 123.12±16.83 | 117.34±16.56 | 129.61±18.99 |
| Systolic pressure (mmHg) | 101.45±11.35 | 95.33±21.33 | 107.54±23.54 |
| Diastolic pressure (mmHg) | 69.99±9.05 | 62.66±13.51 | 77.76±31.45 |
| GLU (mmol/L) | 6.30±2.50 | 5.52±3.12 | 7.83±2.92 |
| WBC (109/L) | 11.18±4.43 | 9.33±3.12 | 13.83±4.24 |
| Neutrophils (%) | 56.45±18.11 | 51.09±20.65 | 60.09±22.94 |
| Lymphocytes (%) | 35.94±16.52 | 33.21±21.21 | 38.46±17.92 |
| HB (g/dL) | 119.08±12.34 | 118.92±22.01 | 119.66±31.28 |
| PLT (109/L) | 313.23±91.44 | 310.11±98.10 | 312.92±101.31 |
| ALT (IU/L) | 21.86±35.21 | 20.21±30.22 | 23.54±29.35 |
| AST (IU/L) | 37.91±21.06 | 35.87±20.92 | 37.84±32.12 |
| CK (IU/L) | 144.11±193.71 | 152.42±200.12 | 142.98±188.72 |
| CK-MB (IU/L) | 16.51±26.20 | 20.48±21.32 | 15.89±34.02 |
| CRP (mg/L) | 3.61±4.14 | 3.24±5.22 | 3.77±3.89 |
| LDH (U/L) | 260.17±74.62 | 258.11±85.32 | 268.39±74.66 |
| K (mmol/L) | 4.29±1.02 | 4.35±1.08 | 4.22±1.31 |
| Na (mmol/L) | 136.17±3.76 | 138.56±3.98 | 135.09±4.22 |
| CL (mmol/L) | 101.67±41.80 | 104.27±40.96 | 95.38±39.69 |
RR: respiratory rate, GLU: blood glucose, LYM: percentage of lymphocytes, ALT: alanine aminotransferase, CL: blood chlorine, WBC: white blood cell counts, CK: creatine kinase, CK-MB: creatine kinase-MB, CRP: C-reactive protein, LDH: Lactate dehydrogenase.