Table 1.
Comparison between results of gpELISA and FAMA with different cutoffs.
| gpELISA | Sensitivity | Specificity | Kappa value (95% CI) |
||
|---|---|---|---|---|---|
| Positive or equivocal | Negative | ||||
| FAMA 1:4 | |||||
| Positive | 345 | 11 | 99.4% | 79.3% | 0.848 (0.766–0.929) |
| Negative | 2 | 42 | |||
| FAMA 1:8 | |||||
| Positive | 330 | 4 | 95.1% | 92.5% | 0.793 (0.707–0.879) |
| Negative | 17 | 49 | |||
| FAMA 1:16 | |||||
| Positive | 306 | 2 | 88.2% | 96.2% | 0.638 (0.539–0.738) |
| Negative | 41 | 51 | |||
CI = confidence interval, FAMA = fluorescent antibody to membrane antigen, gpELISA = glycoprotein enzyme-linked immunosorbent assay.