Fig. 4
From: A nomogram to predict conversion of laparoscopic surgery to laparotomy for Choledocholithiasis
DCA curves for the nomogram in the training group. The x-axis represents the threshold probabilities and the y-axis measures the net benefit. The red line represents the nomogram. The dotted blue line represents that all patients underwent the conversion to laparotomy surgery. The dotted green line represents that all patients underwent laparoscopic surgery without conversion. The net benefit is calculated by adding the true positives and subtracting the false positives. DCA, decision curve analysis