Table 2:
Patient and tumor characteristics. Median and IQR are reported for patient age, tumor major axis length and follow up time.
| Characteristics | Training Set (N=446) | Test Set (N=446) |
|---|---|---|
| Median Age(years) | 52.68 | 51.62 |
| Age Range(years) | 21.75–79.91 | 23.98–89.49 |
| Race/Ethnicity | ||
| White | 316 | 312 |
| Black | 104 | 96 |
| Asian | 6 | 8 |
| Native | 3 | 0 |
| Hispanic | 4 | 13 |
| Multi | 2 | 6 |
| Hawaiian | 1 | 0 |
| American Indian | 1 | 2 |
| Not Available | 9 | 9 |
| Menopausal Status- | ||
| Pre | 186 | 205 |
| Post | 256 | 231 |
| Not Available | 4 | 10 |
| Estrogen Receptor Status | ||
| Positive | 330 | 335 |
| Negative | 116 | 111 |
| Tumor Staging (Size) | ||
| T1 | 198 | 206 |
| T2 | 191 | 187 |
| T3 | 48 | 35 |
| T4 | 7 | 14 |
| Not Available | 2 | 4 |
| Node Involvement | ||
| N0 | 257 | 272 |
| N1 | 130 | 125 |
| N2 | 33 | 24 |
| N3 | 21 | 17 |
| Not available | 5 | 8 |
| Nottingham grade | ||
| Low | 88 | 72 |
| Intermediate | 223 | 219 |
| High | 129 | 147 |
| Not Available | 6 | 8 |
| Median Follow up(years) | 4.08 | 3.48 |
| Number of distant Recurrences | 41 | 32 |