Table 3. Cut-off 4-hour post-ERCP amylase levels for predicting pancreatitis.
| Cut-off value | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|
| Amylase > 4.0 × ULR | 12/16 (75.0) | 466/500 (93.2) | 12/46 (26.1) | 466/470 (99.1) |
| Amylase > 3.0 × ULR | 12/16 (75.0) | 442/500 (88.4) | 12/70 (17.1) | 442/446 (99.1) |
| Amylase > 2.5 × ULR | 13/16 (81.3) | 431/500 (86.2) | 13/82 (15.9) | 431/434 (99.3) |
| Amylase > 2.0 × ULR | 13/16 (81.3) | 405/500 (81.0) | 13/108 (12.0) | 405/408 (99.3) |
| Amylase > 1.5 × ULR | 15/16 (93.8) | 365/500 (73.0) | 15/150 (10.0) | 365/366 (99.7) |
Values are presented as number (%).
ERCP = endoscopic retrograde cholangiopancreatography, PPV = positive predictive value, NPV = negative predictive value, ULR = upper limit of reference.