Table 1 Demographic and clinical presentation of the study patients by viral type and subtype.
Data | Viral findings | ||
|---|---|---|---|
| Â | Influenza A/H1N1 (n = 143) | Influenza A/H3N2 (n = 519) | Influenza B (n = 239) |
Males | 79 (55.2) | 312 (60.1) | 125 (52.3) |
Mean age ± SD, yrs | 2.33 ± 1.40*° | 4.69 ± 3.07 | 5.17 ± 3.21 |
Age groups, No. (%) | Â | Â | Â |
   < 2 yrs | 39 (27.3)* | 22 (4.2) | 76 (31.8)* |
   2-5 yrs | 103 (72.0)*° | 491 (94.6) | 74 (30.9)* |
   > 5 yrs | 1 (0.7)° | 6 (1.2) | 89 (37.2)* |
Presence of fever" (%) | 109 (76.2)* | 452 (87.1) | 179 (74.8)* |
   High-grade fever° (%) | 106 (74.1)* | 416 (80.2) | 169 (70.7)* |
Respiratory tract infection (%) | 128 (89.5) | 436 (84.0) | 205 (85.8) |
Upper respiratory tract Infection (%) | 107 (61.5)* | 261 (50.3) | 164 (68.7)* |
Common cold (%) | 69 (48.3)* | 56 (10.8) | 92 (38.5)* |
Pharyngitis (%) | 33 (23.1) | 140 (26.9) | 54 (22.5) |
Acute otitis media (%) | 9 (6.3) | 46 (8.9) | 14 (5.9) |
Croup (%) | 4 (2.8) | 11 (2.1) | 4 (1.7) |
Lower respiratory tract infection (%) | 21 (14.6)* | 175 (33.7) | 41 (17.2)* |
Acute bronchitis (%) | 24 (16.8)° | 83 (15.9) | 21 (8.8)* |
Wheezing (%) | 3 (2.0)* | 58 (11.1) | 7 (2.9)* |
Pneumonia (%) | 0 (0.0)* | 34 (6.5) | 13 (5.4) |
Gastroenteritis (%) | 5 (3.5) | 17 (3.3) | 11 (4.6) |
Fever without source (%) | 6 (4.2)* | 52 (10.0) | 7 (2.9)* |
Febrile seizures (%) | 4 (2.7) | 14 (2.7) | 4 (1.7) |
Myositis (%) | 0 (0.0)° | 0 (0.0) | 12 (5.0) |