Table 2.
Diagnostic performance of ultrasound parameters in differentiating CBA and CC
| US parameter | Sensitivity (%) | Specificity (%) | AUC | Youden index | Cutoff value (mm) |
|---|---|---|---|---|---|
| GB width | 90.0 | 71.4 | 0.899 | 0.614 | 4.00 |
| Change in GB width | 90.0 | 42.9 | 0.704 | 0.329 | 1.00 |
| Wall thickness | 60.0 | 97.1 | 0.803 | 0.571 | 1.50 |
| Change in cyst length | 90.0 | 57.1 | 0.741 | 0.471 | 8.00 |
| GB-cyst connection | 91.4 | 40.0 | 0.657 | 0.314 | - |
| RHA | 50.0 | 100 | 0.750 | 0.500 | - |
| Combinationa) | 90.0 | 91.4 | 0.971 | 0.814 | - |
CBA, cystic biliary atresia; CC, choledochal cyst; US, ultrasonography; AUC, area under the curve; GB, gallbladder; RHA, right hepatic artery.
a)
Combination: the combination of GB width, wall thickness, and GB-cyst connection.