Table 2 Sensitivity, Specificity, positive and negative predictive value for a case definition of Influenza-like Illness by presence or absence of laboratory-confirmed influenza virus infection.
Age (years) | 2 to 6 | 7 to 18 | >18 | p-value |
|---|---|---|---|---|
Sensitivity | 76 (335)* | 73 (401) | 68 (148) | .18 |
Specificity | 32 (470) | 37 (487) | 53 (798) | <.0001 |
Positive Predictive Value | 44 (576) | 49 (599) | 21 (476) | .01 |
Negative Predictive Value | 66 (229) | 63 (289) | 90 (471) | <.0001 |