Table 2.
Symptoms
| Total (N = 396) |
Influenza A (n = 96) |
Influenza B (n = 300) |
p-valuea | |
|---|---|---|---|---|
| Fever (≥38 °C) (%) | 271 (69.2) | 71 (75.5) | 200 (67.3) | 0.133 |
|
Temperature (°C) Md (IQR) |
– |
38.6 (37.98–39.3) |
38.3 (37.6–39.0) |
0.004 |
| Cough (%) | 258 (65.2) | 67 (69.8) | 191 (63.7) | 0.273 |
| Malaise/prostration (%) | 243 (61.4) | 57 (59.4) | 186 (62) | 0.646 |
| Rales (%) | 147 (37.1) | 43 (44.8) | 104 (37.4) | 0.074 |
| Dyspnea (%) | 124 (31.3) | 40 (41.7) | 84 (28) | 0.012 |
| Vomiting (%) | 76 (19.2) | 11 (11.5) | 65 (21.7) | 0.027 |
| Abrupt onset (<12 h) (%) | 67 (16.9) | 15 (15.2) | 52 (17.3) | 0.698 |
| Muscle ache (%) | 64 (16.2) | 17 (17.7) | 47 (15.7) | 0.636 |
| Diarrhea (%) | 60 (15.2) | 16 (16.7) | 44 (14.7) | 0.634 |
| Cognitive impairment (%) | 48 (12.1) | 8 (8.3) | 40 (13.3) | 0.191 |
| Headache (%) | 43 (10.9) | 15 (15.6) | 28 (9.3) | 0.085 |
| Thoracic pain (%) | 38 (9.6) | 10 (10.4) | 28 (9.3) | 0.754 |
| Coryza (%) | 36 (9.1) | 5 (5.2) | 31 (10.3) | 0.155b |
| Incontinence (%) | 34 (8.6) | 7 (7.3) | 27 (9) | 0.631 |
| Epigastric pain (%) | 31 (7.8) | 5 (5.2) | 26 (8.7) | 0.272b |
| Chills (%) | 30 (7.6) | 4 (4.2) | 26 (8.7) | 0.147 |
| Sore throat (%) | 20 (5.1) | 7 (7.3) | 13 (4.3) | 0.247 |
Md median, IQR interquartile range
ap-values derived from χ2-tests if not otherwise noted
bFisher’s exact test