Table 1.
Demographics and clinicopathologic characteristics of invasive triple-negative breast cancer patients in SEER database.
| Variables | All patients, (n = 46,902) | 2010–2016 With Liver metastasis (Training) (n = 515) |
2017–2018 With Liver metastasis (validation) (n = 100) |
Without Liver metastasis (n = 46,287) |
|---|---|---|---|---|
| Age, median (IQR) | 59 (49, 69) | 59 (49.5, 69) | 62 (51,70) | 59 (49,69) |
| Race, n (%) | ||||
| White | 33674 (71.8) | 367 (71.2) | 69 (69.0) | 33238 (71.8) |
| Black | 9613 (20.5) | 123 (23.9) | 29 (29.0) | 9461 (20.4) |
| Asian&Pacific Islander | 3349 (7.1) | 22 (4.3) | 2 (2.0) | 3325 (7.2) |
| American Indian&Alaska Nativ | 266 (0.6) | 3 (0.6) | 0 (0) | 263 (0.6) |
| T stage, n (%) | ||||
| I | 21179 (45.2) | 60 (11.7) | 9 (9) | 21110 (45.6) |
| II | 19118 (40.8) | 156 (30.3) | 32 (32.0) | 18930 (40.9) |
| III | 3766 (8.0) | 97 (18.8) | 21 (21.0) | 3648 (7.9) |
| IV | 2839 (6.0) | 202 (39.2) | 38 (38.0) | 2599 (5.6) |
| Nodal status, n (%) | ||||
| N0/N1 | 42134 (89.8) | 352 (68.3) | 61 (61.0) | 41721 (90.1) |
| N2/N3 | 4768 (10.2) | 163 (31.7) | 39 (39.0) | 4566 (9.9) |
| Marital, n (%) | ||||
| Single | 20734 (44.2) | 284 (55.2) | 59 (59.0) | 20391 (44.1) |
| Married | 26168 (55.8) | 231 (44.8) | 41 (41.0) | 25896 (55.9) |
| Grade, n (%) | ||||
| I | 884 (1.9) | 4 (0.8) | 1 (1.0) | 879 (1.9) |
| II | 8344 (17.8) | 92 (17.8) | 12 (12.0) | 8240 (17.8) |
| III | 37419 (79.8) | 414 (80.4) | 87 (87.0) | 36918 (79.8) |
| IV | 255 (0.5) | 5 (1.0) | 0 (0.0) | 250 (0.5) |
| Laterality, n (%) | ||||
| Left | 24095 (51.37) | 268 (52.0) | 49 (49.0) | 23778 (51.37) |
| Right | 22797 (48.61) | 244 (47.4) | 50 (50.0) | 22503 (48.62) |
| Bilateral | 10 (0.02) | 3 (0.6) | 1 (1.0) | 6 (0.01) |
| Histologic Type, n (%) | ||||
| IDC | 43005 (91.7) | 475 (92.2) | 91 (91.0) | 42439 (91.7) |
| ILC | 633 (1.3) | 12 (2.3) | 0 (0.0) | 621 (1.3) |
| Other | 3264 (7.0) | 28 (5.5) | 9 (9.0) | 3227 (7.0) |
| With Brain Metastasis, n (%) | ||||
| No | 46689 (99.5) | 457 (88.7) | 92 (92.0) | 46140 (99.7) |
| Yes | 213 (0.5) | 58 (11.3) | 8 (8.0) | 147 (0.3) |
| With Lung Metastasis, n (%) | ||||
| No | 46051 (98.2) | 319 (61.9) | 64 (64.0) | 45668 (98.7) |
| Yes | 851 (1.8) | 196 (38.1) | 36 (36.0) | 619 (1.3) |
| With Bone Metastasis, n (%) | ||||
| No | 45949 (98.0) | 268 (52.0) | 43 (43) | 45638 (98.6) |
| Yes | 953 (2.0) | 247 (48.0) | 57 (57) | 649 (1.4) |
| Surgery, n (%) | ||||
| No | 3211 (6.9) | 324 (62.9) | 69 (69.0) | 2818 (6.1) |
| Yes | 43691 (93.1) | 191 (37.1) | 31 (31.0) | 43469 (93.9) |
| Radition, n (%) | ||||
| No/unkown | 24237 (51.7) | 385 (74.8) | 74 (74.0) | 23778 (51.4) |
| Yes | 22665 (48.3) | 130 (25.2) | 26 (26) | 22509 (48.6) |
| Chemotherapy, n (%) | ||||
| No/unkown | 12198 (26.0) | 121 (23.5) | 22 (22.0) | 12055 (26.0) |
| Yes | 34704 (74.0) | 394 (76.5) | 78 (78.0) | 34232 (74.0) |
SEER: Surveillance, Epidemiology, and End Results; IDC: invasive ductal carcinoma; ILC: invasive lobular carcinoma; IQR: interquartile range.