ROC analysis for the immunohistochemistry cut-off score.

<p>The sensitivity and specificity for each clinical outcome were plotted (A–F). Accuracy was measured by the area under the ROC curve (AUC). The dashed line indicates a reference test threshold with an AUC of 0.5. The AUC > 0.5 with a statistical significance represents a worthy test. pT status, depth of tumors; pN status, LN status.