From: Asymptomatic ratio for seasonal H1N1 influenza infection among schoolchildren in Taiwan
Symptoms | Asymptomatic ratio stratified by area (%) | P-value1 | |||
---|---|---|---|---|---|
KM | CH | IL | TP | ||
Fever | 64.8 (48.3-81.4) | 73.9 (43.5-100) | 84.9 (72.2-97.5) | 45.2 (12.7-77.8) | 0.0033 |
Fever + cough | 76.5 (61.8-91.2) | 76.2 (46.7-100) | 87.9 (76.4-99.4) | 29.2 (0.0-58.9) | <.0001 |
Fever + (cough or vomiting) | 71.4 (55.8-87.1) | 76.2 (46.7-100) | 87.9 (76.4-99.4) | 10.5 (0.0-30.6) | <.0001 |
Fever + (cough or headache) | 64.6 (48.0-81.2) | 76.2 (46.7-100) | 87.9 (76.4-99.4) | 20.0 (0.0-46.1) | <.0001 |
Fever + (cough or nose) | 66.7 (50.3-83.0) | 76.2 (46.7-100) | 84.9 (72.2-97.5) | 20.0 (0.0-46.1) | <.0001 |
Fever + (cough or vomiting or headache) | 62.5 (45.7-79.3) | 76.2 (46.7-100) | 87.9 (76.4-99.4) | 9.1 (0.0-27.9) | <.0001 |
Fever + sore throat | 82.0 (68.7-95.3) | 100.0 (−) | 87.9 (76.4-99.4) | 22.2 (0.0-49.4) | <.0001 |
Fever + ( sore throat or vomiting) | 75.5 (60.6-90.4) | 100.0 (−) | 87.9 (76.4-99.4) | 0.0 (−) | <.0001 |
Fever + ( sore throat or headache) | 68.8 (52.7-84.8) | 100.0 (−) | 87.9 (76.4-99.4) | 15.8 (0.0-39.6) | <.0001 |
Fever + ( sore throat or nose) | 72.0 (56.4-87.6) | 81.0 (53.7-100) | 84.9 (72.2-97.5) | 13.6 (0.0-36.1) | <.0001 |
Fever + ( sore throat or vomiting or headache) | 66.7 (50.3-83.0) | 100.0 (−) | 87.9 (76.4-99.4) | 0.0 (−) | <.0001 |
Any symptom | 39.1 (22.2-56.0) | 65.0 (31.9-98.1) | 72.7 (57.1-88.4) | 0.0 (−) | <.0001 |
Fever + (cough or sore throat)* | 74.0 (58.8-89.2) | 76.2 (46.7-100) | 84.9 (72.2-97.5) | 17.4 (0.0-42.2) | <.0001 |
Fever + (cough or sore throat or nose) + (headache or pain or tired)# | 72.9 (57.5-88.3) | 90.5 (70.1-100) | 90.9 (80.8-100) | 0.0 (−) | <.0001 |