Fig. 2

ROC curve for the PNI. The continuous variables PNI and DFS were used as the test and state variables, respectively. The PNI cut-off value was 42.9, with the area under the curve, sensitivity, and specificity being 0.663, 0.758, and 0.575, respectively. ROC receiver operating characteristic; PNI prognostic nutritional index, DFS disease-free survival