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Receiver operating characteristic (ROC) curve analysis for optimal cut-off point of CD105-MVD. According to the ROC curve analysis the hypervascularized tumours were discriminated from the hypovascularized tumours. ROC analysis indicated an optimal cut-off of 179.7 microvessel/mm2 in prognostic survival in stage II rectal cancer (Figure 6). Area under the ROC curve (AUC): 0.587, P = 0.165.
