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Sensitivity, specificity, positive likelihood ratio (LR+) and negative likelihood ratio (LR-) for the bulk milk test at an optical density ratio (ODR) positivity threshold (cut-off) between 0.10 and 0.20. AUC = 0.45.
| ODR Cut-off | Sensitivity | Specificity | LR+ | LR- |
|---|---|---|---|---|
| 0.10 | 79.2 | 4.5 | 0.8 | 4.6 |
| 0.12 | 66.7 | 18.2 | 0.8 | 1.8 |
| 0.14 | 62.5 | 27.2 | 0.9 | 1.4 |
| 0.16 | 45.8 | 54.5 | 1.0 | 1.0 |
| 0.18 | 37.5 | 63.6 | 1.0 | 1.0 |
| 0.20 | 12.5 | 81.8 | 0.7 | 1.1 |
