Table 1. Demographic Characteristics for US Black Women and Non-Hispanic White Women With Breast Cancer in CARRIERS Consortium Population-Based Studies.
| Characteristic | No. (%) | P value | |
|---|---|---|---|
| Black women (n = 3946) | Non-Hispanic White women (n = 25 287) | ||
| Age at diagnosis, y | |||
| Mean (SD) | 56.5 (12.02) | 62.7 (11.14) | <.001 |
| <40 | 366 (9.3) | 668 (2.6) | |
| 41-50 | 907 (23.0) | 3010 (11.9) | |
| 51-60 | 1184 (30.0) | 6111 (24.2) | |
| 61-70 | 933 (23.6) | 8407 (33.2) | |
| >71 | 540 (13.7) | 6627 (26.2) | |
| Missing | 16 (0.4) | 464 (1.8) | |
| Study | |||
| BWHS | 1437 (36.4) | 0 | <.001 |
| CPS3 | 32 (0.8) | 1379 (5.5) | |
| CPSII | 59 (1.5) | 3919 (15.5) | |
| CTS | 55 (1.4) | 1992 (7.9) | |
| MCBCS | 34 (0.9) | 4239 (16.8) | |
| MEC | 685 (17.4) | 879 (3.5) | |
| MMHS | 1 (0.0) | 289 (1.1) | |
| NHS | 13 (0.3) | 1982 (7.8) | |
| NHSII | 8 (0.2) | 884 (3.5) | |
| WCHS | 1568 (39.7) | 549 (2.2) | |
| WHI | 0 | 4994 (19.7) | |
| WWHS | 54 (1.4) | 4181 (16.5) | |
| ER status | |||
| Negative | 981 (24.9) | 2426 (9.6) | <.001 |
| Positive | 2375 (60.2) | 13 939 (55.1) | |
| Missing | 590 (15.0) | 8922 (35.3) | |
| PR status | |||
| Negative | 1257 (31.9) | 4287 (17.0) | <.001 |
| Positive | 1887 (47.8) | 11 789 (46.6) | |
| Missing | 802 (20.3) | 9211 (36.4) | |
| ERBB2 status | |||
| Negative | 1833 (46.5) | 8400 (33.2) | <.001 |
| Positive | 431 (10.9) | 1573 (6.2) | |
| Missing | 1682 (42.6) | 15 314 (60.6) | |
| Triple negative | |||
| No | 2619 (66.4) | 14 610 (57.8) | <.001 |
| Yes | 466 (11.8) | 894 (3.5) | |
| Missing | 861 (21.8) | 9783 (38.7) | |
| First-degree relative with breast cancer | |||
| No | 3261 (82.6) | 19 131 (75.7) | <.001 |
| Yes | 660 (16.7) | 5242 (20.7) | |
| Missing | 25 (0.6) | 914 (3.6) | |
| First-degree relative with ovarian cancer | |||
| No | 2015 (51.1) | 22 727 (89.9) | <.001 |
| Yes | 109 (2.8) | 827 (3.3) | |
| Missing | 1822 (46.2) | 1733 (6.9) | |
Abbreviations: BHWS, Black Women’s Health Study; CARRIERS, Cancer Risk Estimates Related to Susceptibility; CPS3, Cancer Prevention Study-3; CPSII, Cancer Prevention Study II; CTS, California Teachers Study; ER, estrogen receptor; MCBCS, Mayo Clinic Breast Cancer Study; MEC, Multiethnic Cohort Study; MMHS, Mayo Mammography Health Study; NHS, Nurses’ Health Study; NHSII, Nurses’ Health Study II; PR, progesterone receptor; WCHS, Women’s Circle of Health Study; WHI, Women’s Health Initiative; WWHS, Wisconsin Women’s Health Study.