Table 3 Concordance between the aptasensor and PCR tests.
| Â | PCR | Â | ||||
|---|---|---|---|---|---|---|
| Â | Positive | Negative | Total | |||
Aptasensor | Positive | 7 | 9 | 7 | % Positive agreement (Low – High limits) | 100.0 (64.6–100.0) |
|  | Negative | 0 | 12 | 21 | % Negative agreement (Low – High limits) | 57.1 (36.5–75.5) |
|  | Total | 7 | 21 | 28 | % Overall agreement (Low – High limits) | 67.9 (49.3–82.1) |
|  |  |  |  |  | Kappa (95% CI) | 0.40 (0.14–0.66) |
