Covariates | ER- | ER+ | Logistic likelihood ratio test P | ||
---|---|---|---|---|---|
 | n | % | n | % |  |
All | 68 | Â | 49 | Â | Â |
Histologic type | Â | Â | Â | Â | Â |
   Invasive ductal only * | 67 | 99 | 37 | 76 | <0.001 |
   Other | 1 | 1 | 12 | 24 |  |
   Mixed ductal/lobular | 1 |  | 10 |  |  |
   Tubular | 0 |  | 1 |  |  |
   Lobular | 0 |  | 1 |  |  |
Histologic grade | Â | Â | Â | Â | Â |
   3 * | 66 | 97 | 20 | 41 | <0.001 |
   1-2 | 2 | 3 | 28 | 57 |  |
   Unknown (combined with 1-2) | 0 | 0 | 1 | 2 |  |
Mitotic activity | Â | Â | Â | Â | Â |
   >10 mitoses per 10 HPF * | 64 | 94 | 11 | 22 | <0.001 |
   0-10 mitoses per 10 HPF | 4 | 6 | 37 | 76 |  |
   Unknown | 0 | 0 | 1 | 2 |  |
Margins | Â | Â | Â | Â | Â |
   Invasive * | 22 | 32 | 44 | 90 | <0.001 |
   Pushing | 41 | 60 | 4 | 8 |  |
   Unknown | 5 | 7 | 1 | 2 |  |
Lymphocytic infiltrate | Â | Â | Â | Â | Â |
   Moderate/marked * | 20 | 29 | 3 | 6 | 0.003 |
   None/mild | 46 | 68 | 45 | 92 |  |
   Unknown * | 2 | 3 | 1 | 2 |  |
Geographic necrosis/fibrotic focus | Â | Â | Â | Â | Â |
   Yes * | 50 | 74 | 8 | 16 | <0.001 |
   No | 15 | 22 | 39 | 80 |  |
   Unknown * | 3 | 4 | 2 | 4 |  |
Age of breast cancer | Â | Â | Â | Â | Â |
   Median (range) | 39.5 (28-73) |  | 45 (29-72) |  |  |
   <40 | 34 | 50 | 15 | 31 | 0.03 |
   40-49 | 27 | 40 | 20 | 41 | 0.91 |
   ≥ 50 | 7 | 10 | 14 | 29 | 0.01 |