ROC areas and cut off titres with test characteristics
| Area | 95% CI | Best cut off titre* | Sensitivity | Specificity | |
|---|---|---|---|---|---|
| *Point closest to the upper left corner on the ROC curve. | |||||
| Elastase | 0.926 | 0.882 to 0.969 | >1:35 | 87% | 89% |
| Exotoxin A | 0.874 | 0.821 to 0.927 | >0 | 79% | 81% |
| Alkaline protease | 0.909 | 0.856 to 0.963 | >0 | 76% | 97% |