|  |  | PCR assay | qPCR assay | ||
---|---|---|---|---|---|---|
Positive | Negative | Positive | Negative | |||
LF-RPA assay | Â | Positive | 25 (TP) | 7 (FP) | 28 (TP) | 4 (FP) |
 | Negative | 4 (FN) | 24 (TN) | 2 (FN) | 26 (TN) | |
Performance characteristics | McNemar’s test |  | χ2 = 0.167, P = 0.549 | χ2 = 0.364, P = 0.687 | ||
Kappa |  | K = 0.634, P = 0.000 | K = 0.800, P = 0.000 | |||
Sensitivity (%) | Â | 86.2 | 93.3 | |||
Specificity (%) | Â | 77.4 | 86.7 | |||
Accuracy (%) | Â | 81.7 | 90.0 |