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Positive predictive value and negative predictive value of different cutoff values
| Cutoff value | Positive | Negative | PPV (%) | NPV (%) | ||
|---|---|---|---|---|---|---|
| TP | FN | TN | FP | |||
| ≥0.3865a | 135 | 11 | 93 | 9 | 93.75 | 89.42 |
| ≥0.5730b | 127 | 19 | 82 | 20 | 80.89 | 81.19 |
TP, true positives; TN, true negatives; FP, false positives; FN, false negatives; PPV, positive predictive value (TP/TP + FP) × 100; NPV, negative predictive value (TN/TN + FN) × 100
acutoff value is calculated by rOMP ELISA
bcutoff value is calculated by antigen of SAT ELISA
