| Histologic grade | |||
---|---|---|---|---|
 | Total | I | II | III |
Number of cases | 158 | 34 | 86 | 38 |
 Resection | 103 | 20 | 58 | 25 |
 Biopsy | 55 | 14 | 28 | 13 |
Median patient age | 57 ± 8 | 57.5 ± 6 | 56.5 ± 7 | 56.5 ± 9 |
Tumor size (cm) | 1.6 ± 0.6 | 1.5 ± 0.7 | 1.6 ± 0.7 | 1.5 ± 0.4 |
Oncotype DX RS | 15 ± 4.5 | 14 ± 3 | 14 ± 4 | 23.5 ± 6.5 |