Clinical characteristics of and risk factors for hepatolithiasis developed after surgery for congenital biliary dilatation

Figure 3 The ability of age at surgery to predict the development of postoperative hepatolithiasis. A: Time-dependent receiver operating curve at 6 years after surgery. The area under the curve was 0.953. The cutoff age based on the Youden index was 31 years; B: Kaplan-Meier curve for hepatolithiasis stratified by age at surgery.