Table 1.
Baseline clinicopathological characteristics of patients with breast cancer in SEER database
| Characteristics | Total | Married | Single | DSW | P‐value |
|---|---|---|---|---|---|
| Overall | 298 434 | 176 109 (59%) | 43 262 (14.5%) | 79 063 (26.5%) | |
| Age (years) | <0.001 | ||||
| <35 | 6813 | 3807 (55.9%) | 2551 (37.4%) | 455 (6.7%) | |
| 35‐70 | 219 252 | 142 260 (64.9%) | 34 869 (15.9%) | 42 123 (19.2%) | |
| ≥70 | 72 369 | 30 042 (41.5%) | 5842 (8.1%) | 36 485 (50.4%) | |
| Sex | <0.001 | ||||
| Female | 296 500 | 174 763 (58.9%) | 42 984 (14.5%) | 78 753 (26.6%) | |
| Male | 1934 | 1346 (69.6%) | 278 (14.4%) | 310 (16%) | |
| Race | <0.001 | ||||
| White | 241 019 | 146 707 (60.9%) | 30 110 (12.5%) | 64 202 (26.6%) | |
| Black | 31 729 | 11 973 (37.7%) | 9720 (30.6%) | 10 036 (31.6%) | |
| AN/AI | 1542 | 794 (51.5%) | 307 (19.9%) | 441 (28.6%) | |
| API | 24 144 | 16 635 (68.9%) | 3125 (12.9%) | 4384 (18.2%) | |
| Stage | <0.001 | ||||
| Stage 0/I | 138 499 | 85 193 (61.5%) | 16 938 (12.2%) | 36 368 (26.3%) | |
| Stage II | 108 087 | 63 388 (58.6%) | 16 666 (15.4%) | 28 033 (25.9%) | |
| Stage III | 39 362 | 21 795 (55.4%) | 6955 (17.7%) | 10 612 (27%) | |
| Stage IV | 12 486 | 5733 (45.9%) | 2703 (21.6%) | 4050 (32.4%) | |
| Grade | <0.001 | ||||
| Grade I | 59 689 | 36 007 (60.3%) | 7 424 (12.4%) | 16 258 (27.2%) | |
| Grade II | 128 227 | 75 435 (58.8%) | 17 766 (13.9%) | 35 026 (27.3%) | |
| Grade III | 107 872 | 63 108 (58.5%) | 17 604 (16.3%) | 27 160 (25.2%) | |
| Grade IV | 2646 | 1559 (58.9%) | 468 (17.7%) | 619 (23.4%) | |
| Surgery | <0.001 | ||||
| BCS | 163 932 | 98 869 (60.3%) | 22 091 (13.5%) | 42 972 (26.2%) | |
| Other | 121 334 | 71 667 (59.1%) | 18 162 (15%) | 31 505 (26%) | |
| No surgery | 13 168 | 5573 (42.3%) | 3 009 (22.9%) | 4 586 (34.8%) | |
| HRs | <0.001 | ||||
| ER+/PR+ | 192 975 | 115 270 (59.7%) | 27 030 (14%) | 50 675 (26.3%) | |
| ER+/PR‐ | 34 393 | 19 488 (56.7%) | 5008 (14.6%) | 9897 (28.8%) | |
| ER‐/PR+ | 3223 | 1951 (60.5%) | 531 (16.5%) | 741 (23%) | |
| ER‐/PR‐ | 54 669 | 32 027 (58.6%) | 8727 (16%) | 13 915 (25.5%) | |
| Other | 13 174 | 7373 (56%) | 1966 (14.9%) | 3835 (29.1%) | |
| Cause of death | <0.001 | ||||
| Alive or dead of other cause | 266 598 | 160 869 (60.3%) | 37 418 (14%) | 68 311 (25.6%) | |
| Dead (attributable to this cancer) | 31 836 | 15 240 (47.9%) | 5844 (18.4%) | 10 752 (33.8%) | |
Abbreviations: AN/AI, American Indian/Alaska Native; API, Asian or Pacific Islander; BCS, breast‐conserving surgery; DSW, divorced/separated/widowed; ER, estrogen receptor; HRs, hormone receptor status; PR, progesterone receptor.