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ROC-determined sensitivity, specificity, PPV, NPV, LR+, and LR− at different ddPCR concentration threshold values
| Threshold value (plasmids/μl) | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | LR+ | LR− |
|---|---|---|---|---|---|---|
| 0.0707 | 83.7 | 93.7 | 73.7 | 96.5 | 13.25 | 0.17 |
| 0.0732 | 82.6 | 95.0 | 77.7 | 96.3 | 16.50 | 0.18 |
| 0.206 | 74.4 | 99.0 | 94.11 | 94.8 | 75.60 | 0.26 |
| 0.944 | 61.2 | 99.9 | 99.4 | 92.4 | 746.52 | 0.39 |
| 4.122 | 52.7 | 100 | 100 | 90.1 | Infinity | 0.47 |
