MKI67 and neoplasm: When comparing the distribution of clinical variables in each risk group, there was a significant difference in distribution of grade (p < 0.001), Ki67 status (p = 0.004), histologic subtype (p = 0.002) and intrinsic subtype (p < 0.001) across Stratipath risk groups, but no difference regarding PR status, lymph node status or tumor size (Table 4).