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Positive and negative predictive values for malignancy using duct size, lesion size and the combination
| CT criteria | PPV | NPV |
|---|---|---|
| Duct ≥ 1.0 cm | 62% | 90% |
| Lesion ≥ 2.5 cm | 48% | 80% |
| Duct ≥ 1.0 cm or lesion ≥ 2.5 cm | 52% | 100% |
CT, computed tomography; PPV, positive predictive value; NPV, negative predictive value; CT, computed tomography
