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Sensitivity, specificity, positive predictive value and negative predictive value of the RT-PCR test.
| Value | 95% CI | |
|---|---|---|
| Sensitivity (%) | 71.0 | 53.4–88.6 |
| Specificity (%) | 100.0 | 99.5–100.0 |
| Positive predictive value (%) | 100.0 | 97.7–100.0 |
| Negative predictive value (%) | 91.2 | 85.2–97.2 |
| Negative likelihood ratioa | 0.3 | 0.2–0.5 |
Negative likelihood ratio = 1 – sensitivity/specificity = false negatives/true negatives.
