Fig. 5From: Calcar fracture gapping: a reliable predictor of anteromedial cortical support failure after cephalomedullary nailing for pertrochanteric femur fracturesA graph demonstrating the ROC curve by plotting the sensitivity and the 1-specificity. For the calcar fracture gapping assessment, the recommended cut-off point for balancing sensitivity and specificity was 4.2 mm with 91.3% sensitivity and 90.3% specificity in the AP view and 3.8 mm with 80.4% sensitivity and 85.8% specificity in the lateral view. The area under the curve (AUC) was 0.922 for the AP view and 0.843 for the lateral viewBack to article page