Fig. 2From: Establishment of risk prediction model of postoperative pancreatic fistula after pancreatoduodenectomy: 2016 edition of definition and grading system of pancreatic fistula: a single center experience with 223 casesDrawing of the calibration chart to visually evaluate the predictive model. Chart A for modeling set and chart B for validation set. The solid lines indicate the standard curve; the dashed lines indicate the calibration curve; and each point represents a group. The calibration curve is close to the standard curve, suggesting that the prediction model has a good calibration ability. POPF, postoperative pancreatic fistulaBack to article page