Table 2 Assay performance: calculation of the sensitivities with sera from convalescent donors and specificities based on the individual assay performances in A.
Convalescent donors | Potentially cross-reactive sera | ||||||
|---|---|---|---|---|---|---|---|
EI-IgG | Abbott-IgG | Roche-Ig | EI-IgG | Abbott-IgG | Roche-Ig | ||
n | 61 | 61 | 61 | n | 128 | 78 | 122 |
Positive | 52 | 49 | 55 | Crossreaction | 2 | 4 | 0 |
% Negative | 14.75 | 19.67 | 9.84 | % | 1.67 | 1.69 | 0 |
Sensitivity (%) | 85.25 | 80.33 | 90.16 | Specificity (%) | 98.33 | 98.31 | 100 |
CI (%) | 73.83; 93.02 | 68.16; 89.04 | 79.81; 96.30 | CI (%) | 94.47; 99.81 | 87.39; 98.59 | 97.02; 100.00 |
