Signs and Symptoms of Hospitalized Patients by Influenza Type
| Sign or Symptoma | Influenza Typeb | |||
|---|---|---|---|---|
| Seasonal A (n = 2142) | Influenza B (n = 1248) | Unadjusted OR | Adjusted ORc | |
| Systemic | ||||
| Fever | 1990 (92.9) | 1167 (93.5) | 1.10 (0.83–1.46) | — |
| Headache | 78 (3.6) | 123 (9.9) | 2.89 (2.16–3.88) | 1.85 (1.36–2.52) |
| Lethargy | 741 (34.6) | 465 (37.3) | 1.12 (0.97–1.30) | — |
| Respiratory | ||||
| Coryza | 1277 (59.6) | 744 (59.6) | 1.00 (0.87–1.15) | — |
| Cough | 1835 (85.7) | 1051 (84.2) | 0.89 (0.73–1.08) | — |
| Wheezing | 476 (22.2) | 260 (20.8) | 0.92 (0.78–1.09) | — |
| Respiratory distress | 904 (42.2) | 489 (39.2) | 0.88 (0.76–1.02) | — |
| Apnea | 65 (3.0) | 37 (3.0) | 0.98 (0.65–1.47) | — |
| Extrarespiratory | ||||
| Abdominal pain | 119 (5.6) | 126 (10.1) | 1.91 (1.47–2.48) | 1.38 (1.05–1.81) |
| Vomiting and/or diarrhea and/or dehydration | 1003 (46.8) | 569 (45.6) | 0.95 (0.83–1.10) | — |
| Myalgia | 38 (1.8) | 102 (8.2) | 4.93 (3.37–7.20) | 3.19 (2.16–4.72) |
| Arthralgia | 10 (0.5) | 15 (1.2) | 2.59 (1.16–5.79) | 1.95 (0.86–4.40) |
| Seizure | 238 (11.1) | 116 (9.3) | 0.82 (0.65–1.04) | — |