Table 2.
Two‐by‐two table used for the calculation of sensitivity and specificity of the CDC‐M and RVP assays
| True positive* (n = 287) | True negative* (n = 11611) | Sensitivity (%CI) | Specificity (%CI) | |
|---|---|---|---|---|
| CDC‐M‐Pos | 283 | 21 | 98·6% (96·5–99·6) | 99·8% (99·7–99·9) |
| CDC‐M‐Neg | 4 | 11590 | ||
| RVP‐Pos** | 222 | 0 | 77·4% (72·1–82·1) | 100% |
| RVP‐Neg** | 65 | 11611 | ||
| RVP‐Pos*** | 272 | 18 | 94·8% (91·5–97·0) | 99·8% (99·8–99·9) |
| RVP‐Neg*** | 15 | 11593 |
RVP, respiratory viral panel.
*A true positive was defined as a specimen positive for influenza A by two or more independent assays, and a true negative was defined as a specimen positive for influenza A by only one assay or negative by all assays.
**Classify equivocal RVP samples as negative for RVP.
***Classify equivocal RVP samples as positive for RVP.