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Table 2 Dichotomization of core biopsies and surgical samples into low and high proliferation as determined by Ki67 evaluation using a 20% cut-off value

From: Ki67 proliferation in core biopsies versus surgical samples - a model for neo-adjuvant breast cancer studies

  200 cells 1000 cells
  Core biopsies
Surgical samples < 20% >20% Total < 20% > 20% Total
< 20% 19 10 29 29 4 33
>20% 2 19 21 4 13 17
Total 21 29 50 33 17 50