Table 3. Evaluation of traditional algorithm and ECDC algorithm in comparison with reverse algorithm.
| Assay and result | Reverse algorithm | % Positive percent agreement (95%CI) | % Negative percent agreement (95%CI) | % total percent agreement (95%CI) | Kappa value (95%CI) | |
|---|---|---|---|---|---|---|
| Positive | Negative | |||||
| Traditional algorithm | ||||||
| Positive | 123 | 0 | 57.2 | 100 | 89.4 | 0.668 |
| Negative | 92 | 650 | (50.5–63.9) | (100–100) | (87.3–91.4) | (0.603–0.729) |
| ECDC algorithm | ||||||
| Positive | 213 | 0 | 99.1 | 100 | 99.8 | 0.994 |
| Negative | 2 | 650 | (97.8–100) | (100–100) | (99.4–100) | (0.984–1.0) |
Abbreviations: ECDC, European Centre for Disease Prevention and Control.