Figure 1From: Ki67 expression and the effect of neo-adjuvant chemotherapy on luminal HER2-negative breast cancer ROC curve analysis revealed 35% to be the optimal Ki67 cut-off value for distinguishing between pCR and non-pCR cases. ROC curve analysis revealed that, in the 10% to 50% Ki67 range, 35% was the optimal cut-off value for distinguishing pCR from non-pCR cases among our 114 patients. At 35%, the specificity and sensitivity were 0.79 and 0.73, respectively.Back to article page