Table 2.
The clinical and pathologic characteristics of TN-MBC
| Variables | N | % |
|---|---|---|
| Age (median, range) | 62 (22-89) | - |
| Race/ethnicity (n, %) | ||
| White | 877 | 76.5 |
| Black | 190 | 16.6 |
| Other | 79 | 6.9 |
| Insurance (n, %) | ||
| No | 189 | 16.5 |
| Yes | 957 | 83.5 |
| Marital state (n, %) | ||
| Unmarried | 268 | 23.4 |
| Married | 878 | 76.6 |
| Grade (n, %) | ||
| Undifferentiated | 34 | 3.0 |
| Poorly differentiated | 795 | 69.4 |
| Moderately differentiated | 132 | 11.5 |
| Well differentiated | 51 | 4.5 |
| Unknown | 134 | 11.7 |
| Tumor size (n, %) | ||
| T1 | 289 | 25.2 |
| T2 | 550 | 48.0 |
| T3 | 202 | 17.6 |
| T4 | 56 | 4.9 |
| Regional node status (n, %) | ||
| N0 | 918 | 80.1 |
| N1 | 170 | 14.8 |
| N2 | 33 | 2.9 |
| N3 | 25 | 2.2 |
| TNM stage (n, %) | ||
| I | 261 | 22.8 |
| II | 673 | 58.7 |
| III | 156 | 13.6 |
| IV | 56 | 4.9 |
| Chemotherapy (n, %) | ||
| No | 378 | 33.0 |
| Yes | 768 | 67.0 |
| Radiotherapy (n, %) | ||
| No | 638 | 55.7 |
| Yes | 508 | 44.3 |
| Surgery mode (n, %) | ||
| No surgery | 63 | 5.5 |
| BCS | 470 | 41.0 |
| TM | 369 | 32.2 |
| Radical mastectomy | 244 | 21.3 |
Abbreviations: MBC = metaplastic breast cancer; BCS = breast conserving surgery; TM = Total mastectomy.