| Duration of fever after admission (d,, x ± s) | 3.2 ± 1.6 | 1.9 ± 1.2 | 2.2 ± 1.5 | 0.018 |
| Duration of fever after symptom onset (d, x ± s) | 5.8 ± 2.2 | 3.9 ± 2.5 | 3.7 ± 2.0 | 0.006 |
| Mean temperature at admission day (°C, x ± s) | 37.8 ± 0.3 | 37.3 ± 0.3 | 37.3 ± 0.2 | 0.005 |
| Numbers of patients to maximal temperature at admission [n(%)] | | | | < 0.001 |
| Over 40 °C | 10 (14.9) | 3 (2.2) | 2 (4.0) | |
| 39–40 °C | 24 (35.8) | 5 (3.7) | 3 (6.0) | |
| Time of maximal falls in temperature at admission (h, x ± s) | 10.2 ± 5.6 | 8.0 ± 4.5 | 8.6 ± 5.5 | 0.015 |
| Mean change of temperature at 1 h after administrated antipyretics (°C, x ± s) | 1.1 ± 0.7 | 1.2 ± 0.6 | 1.0 ± 0.7 | 0.645 |
| Responsiveness to antipyretics at admission [n(%)] | | | | < 0.001 |
| Complete response | 30 (44.8) | 84 (62.7) | 38 (76.0) | |
| Partial response | 25 (37.3) | 48 (35.8) | 12 (24.0) | |
| No response | 12 (17.9) | 2 (1.5) | (−) | |
