MKI67 and cancer: As shown in Table 2, age and N stage before chemotherapy did not correlate with molecular subtypes, whereas menstrual status (P = 0.026), T stage before chemotherapy (P = 0.004), and Ki67 expressions with a cut-off threshold of 14% (P < 0.001) were significantly differently distributed between the molecular subtypes, being the highest in luminal B type cancers.