Table 6 Multivariate predictors of influenza infection with PPV, NPV, sensitivity, and specificity analyses with 95% confidence intervals (in parenthesis)
From: Asymptomatic ratio for seasonal H1N1 influenza infection among schoolchildren in Taiwan
Symptom | PPV | NPV | Sensitivity | Specificity |
|---|---|---|---|---|
Fever | 59.6 (51.5-67.1) | 82.0 (76.8-86.2) | 66.3 (54.8-76.5) | 77.4 (70.1-83.6) |
Fever + headache | 77.4 (61.0-88.3) | 75.7 (71.7-79.3) | 39.3 (27.1-52.7) | 94.3 (88.5-97.7) |
Fever + headache + cough | 77.8 (59.9-89.1) | 75.7 (71.8-79.2) | 36.8 (24.4-50.7) | 94.9 (89.3-98.1) |
Fever + headache + throat | 75.0 (60.2-85.6) | 79.0 (74.4-82.9) | 48.2 (34.7-62.0) | 92.4 (86.0-96.5) |
Fever + headache + vomiting (model 1) | 90.5 (69.7-97.5) | 77.9 (73.6-81.6) | 39.6 (25.8-54.7) | 98.1 (93.2-99.8) |
Fever + headache + vomiting + grade (model 2) | 67.4 (55.3-77.5) | 84.0 (78.0-88.5) | 64.6 (49.5-77.8) | 85.6 (77.3-91.7) |