TABLE 3.
Comparison of performance of VI with CSFV real-time RT-PCR assay
| Test indexa | % | 95% confidence interval |
|---|---|---|
| Sensitivity | 72.4 (50/69) | 61.9-83.0 |
| Specificity | 100 (380/380) | 100-100 |
| Positive predictive value | 100 (50/50) | 100-100 |
| Negative predictive value | 95.2 (380/399) | 93.1-97.3 |
| False negative rate | 27.5 (19/69) | 17.0-31.9 |
| False positive rate | 0.0 (0/50) | 0.0-0.0 |
| Overall accuracy | 95.7 (430/449) | 93.9-97.6 |
a
Sensitivity, number of positive samples over number of true-positive samples; specificity, number of negative samples over number of true-negative samples; positive predictive value, number of samples that were positive and had CSFV; negative predictive value, number of samples that were negative and did not have CSFV; false-negative rate, number of negative samples confirmed positive over true-positive samples; false-positive rate, number of positive samples confirmed negative over true-positive samples; overall accuracy, total of true-positive and true-negative samples over the total number of samples.