Table 2.
Patient and tumor characteristics in the triple‐negative AC (TNAC) and IDC (TNBC) groups
| Characteristic | TNAC (N = 366) | TNBC (N = 30 996) | P‐value | ||
|---|---|---|---|---|---|
| n | % | n | % | ||
| Age (years) | <.001 | ||||
| 18‐49 | 33 | 9.0 | 9072 | 29.3 | |
| ≥50 | 333 | 91.0 | 21 924 | 70.7 | |
| Race | .001 | ||||
| White | 265 | 72.4 | 21 881 | 70.6 | |
| Black | 51 | 13.9 | 6521 | 21.0 | |
| Other | 48 | 13.1 | 2406 | 7.8 | |
| Unknown | 2 | 0.5 | 188 | 0.6 | |
| Marital status | .500 | ||||
| Married | 185 | 50.5 | 16 622 | 53.6 | |
| Unmarried | 161 | 44.0 | 12 757 | 41.2 | |
| Unknown | 20 | 5.5 | 1617 | 5.2 | |
| Laterality | .167 | ||||
| Left | 170 | 46.4 | 15 925 | 51.4 | |
| Right | 196 | 53.6 | 15 067 | 48.6 | |
| Unknown | 0 | 0.0 | 4 | 0.0 | |
| Tumor grade | <.001 | ||||
| I/II | 242 | 66.1 | 5193 | 16.7 | |
| III/IV | 113 | 30.9 | 24 878 | 80.3 | |
| Unknown | 11 | 3.0 | 925 | 3.0 | |
| T stage | <.001 | ||||
| T1 | 224 | 61.2 | 13 265 | 42.8 | |
| T2 | 108 | 29.5 | 13 139 | 42.4 | |
| T3 | 23 | 6.3 | 2657 | 8.6 | |
| T4 | 11 | 3.0 | 1935 | 6.2 | |
| N stage | .296 | ||||
| N0 | 250 | 68.3 | 19 755 | 63.7 | |
| N1 | 83 | 22.7 | 7816 | 25.2 | |
| N2 | 20 | 5.5 | 1919 | 6.2 | |
| N3 | 13 | 3.6 | 1506 | 4.9 | |
| Metastasis | .070 | ||||
| M0 | 355 | 97.0 | 29 417 | 94.9 | |
| M1 | 11 | 3.0 | 1579 | 5.1 | |
| AJCC stage | <.001 | ||||
| I | 181 | 49.5 | 11 052 | 35.7 | |
| II/III | 174 | 47.5 | 18 365 | 59.2 | |
| IV | 11 | 3.0 | 1579 | 5.1 | |
| Radiation therapy | .090 | ||||
| None/unknown | 168 | 45.9 | 15 609 | 50.4 | |
| Done | 198 | 54.1 | 15 387 | 49.6 | |
| Chemotherapy | <.001 | ||||
| None/unknown | 134 | 36.6 | 7247 | 23.4 | |
| Done | 232 | 53.4 | 23 729 | 76.6 | |
| Surgery | <.001 | ||||
| None | 10 | 2.7 | 2487 | 8.0 | |
| Done | 356 | 97.3 | 28 509 | 92.0 | |
Abbreviations: AJCC, American Joint Committee on Cancer; TNAC, triple‐negative apocrine carcinoma; TNBC, triple‐negative breast cancer.