Assay and result | No. of samples with the following Meridian LA test result: | Sensitivity (%) (95% CI) | Specificity (%) (95% CI) | Agreement (%) (95% CI) | Kappa | |
---|---|---|---|---|---|---|

Positive | Negative | |||||

Premier EIA | ||||||

Positive | 5 | 0 | 55.6 (26.6, 81.2) | 100 (99.3, 100) | 99.4 (98.3, 99.8) | 0.71 |

Negative | 4 | 625 | ||||

Alpha CrAg EIA | ||||||

Positive | 9 | 2^{b} | 100 (65.5, 100) | 99.7 (98.8, 99.9) | 99.7 (98.8, 99.9) | 0.90 |

Negative | 0 | 623 | ||||

CrAg LFA | ||||||

Positive | 9 | 1^{c} | 100 (65.5, 100) | 99.8 (99.0, 100) | 99.8 (99.0, 99.9) | 0.95 |

Negative | 0 | 624 |

↵a LA, latex agglutination; EIA, enzyme immunoassay; LFA, lateral flow assay; 95% CI, 95% confidence interval.

↵b One of these two samples showed 1+ reactivity by the Meridian latex agglutination assay upon screening but was interpreted as negative according to the package insert's requirement for 2+ reactivity.

↵c This sample showed 1+ reactivity by the Meridian latex agglutination assay upon screening but was interpreted as negative according the package insert's requirement for 2+ reactivity.