Table 4 2X2 contingency table for tests developed in the study. A – detection of tox gene, B – detection of dtxR
A | Gold standard | |||
Positive | Negative | Measures | ||
Test results | Positive | 9 | 0 | PPV 9/(9 + 0) × 100% = 100% |
Negative | 0 | 42 | NPV 42/(0 + 42) × 100% = 100% | |
Measures | Sensitivity 9/(9 + 0) × 100% = 100% | Specificity 42/(0 + 42) × 100% = 100% | Accuracy (9 + 42)/(9 + 0 + 0 + 42) × 100% = 100% | |
B | Gold standard | |||
Positive | Negative | Measures | ||
Test results | Positive | 39 | 0 | PPV 39/(39 + 0) × 100% = 100% |
Negative | 0 | 12 | NPV 12/(0 + 12) × 100% = 100% | |
Measures | Sensitivity 39/(39 + 0) × 100% = 100% | Specificity 12/(0 + 12) × 100% = 100% | Accuracy (39 + 12)/(39 + 0 + 0 + 12) = 100% | |