Table 1 Characteristics of female patients diagnosed with primary MpBC in SEER database.
Characteristics | After PSM, n (%) | P-valuea | ||
|---|---|---|---|---|
Overall | Chemotherapy | Chemotherapy-naïve/Unknown | ||
Sample size | 584 | 248 | 336 | |
Age | ||||
≤ 45 | 58 (9.9) | 32 (12.9) | 26 (7.7) | 0.138 |
46–65 | 269 (46.1) | 119 (48.0) | 150 (44.6) | |
> 65 | 257 (44.0) | 97 (39.1) | 160 (47.6) | |
Marriage | ||||
Married | 331 (56.7) | 136 (54.8) | 195 (58.0) | 0.368 |
Single | 71 (12.2) | 37 (14.9) | 34 (10.1) | |
DSW | 145 (24.8) | 59 (23.8) | 86 (25.6) | |
Unknown | 37 (6.3) | 16 (6.5) | 21 (6.2) | |
Race | ||||
White | 468 (80.1) | 199 (80.2) | 269 (80.1) | 0.199 |
Black | 80 (13.7) | 36 (14.5) | 44 (13.1) | |
Other | 30 (5.1) | 13 (5.2) | 17 (5.1) | |
Unknown | 6 (1.0) | 0 (0.0) | 6 (1.8) | |
Median household income | ||||
< $50,000 | 157 (26.9) | 54 (21.8) | 103 (30.7) | 0.048 |
$50,000 ~ 70,000 | 311 (53.3) | 144 (58.1) | 167 (49.7) | |
> $70,000 | 116 (19.9) | 50 (20.2) | 66 (19.6) | |
Year | ||||
2000–2003 | 91 (15.6) | 36 (14.5) | 55 (16.4) | 0.717 |
2004–2008 | 160 (27.4) | 65 (26.2) | 95 (28.3) | |
2009–2012 | 163 (27.9) | 69 (27.8) | 94 (28.0) | |
2013–2016 | 170 (29.1) | 78 (31.5) | 92 (27.4) | |
Grade | ||||
I–II | 178 (30.5) | 70 (28.2) | 108 (32.1) | 0.574 |
III–IV | 319 (54.6) | 141 (56.9) | 178 (53.0) | |
Unknown | 87 (14.9) | 37 (14.9) | 50 (14.9) | |
T stage | ||||
T1a | 26 (4.5) | 9 (3.6) | 17 (5.1) | 0.345 |
T1b | 116 (19.9) | 44 (17.7) | 72 (21.4) | |
T1c | 442 (75.7) | 195 (78.6) | 247 (73.5) | |
ER | ||||
Positive | 104 (17.8) | 49 (19.8) | 55 (16.4) | 0.322 |
Negative | 441 (75.5) | 186 (75.0) | 255 (75.9) | |
Unknown | 39 (6.7) | 13 (5.2) | 26 (7.7) | |
PR | ||||
Positive | 91 (15.6) | 43 (17.3) | 48 (14.3) | 0.364 |
Negative | 452 (77.4) | 191 (77.0) | 261 (77.7) | |
Unknown | 41 (7.0) | 14 (5.6) | 27 (8.0) | |
HER2 | ||||
Positive | 11 (1.9) | 6 (2.4) | 5 (1.5) | 0.797 |
Negative | 277 (47.4) | 120 (48.4) | 157 (46.7) | |
Unknown | 21 (3.6) | 8 (3.2) | 13 (3.9) | |
Unavailable | 275 (47.1) | 114 (46.0) | 161 (47.9) | |
Molecular Subtype | ||||
HR + /HER2- | 79 (13.5) | 38 (15.3) | 41 (12.2) | 0.578 |
HER2 enriched | 11 (1.9) | 6 (2.4) | 5 (1.5) | |
TNBC | 197 (33.7) | 82 (33.1) | 115 (34.2) | |
Unknown | 297 (50.9) | 122 (49.2) | 175 (52.1) | |
Surgery | ||||
Non-surgery | 8 (1.4) | 2 (0.8) | 6 (1.8) | 0.518 |
Surgery | 576 (98.6) | 246 (99.2) | 330 (98.2) | |
Radiation | ||||
Radiation | 287 (49.1) | 128 (51.6) | 159 (47.3) | 0.346 |
Non-radiation/Unknown | 297 (50.9) | 120 (48.4) | 177 (52.7) | |
