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Baseline characteristics of breast cancer case-control study participants.
| Cases with breast cancer (n = 1920) | Controls (n = 17,344) | |
|---|---|---|
| Age, mean (SD), yr | 57.4 (12.5) | 45.9 (13.5) |
| Female sex, n (%) | 1920 (100) | 17,344 (100) |
| Race, n (%) | ||
| White | 1375 (71.6) | 12,365 (71.3) |
| Black | 30 (1.5) | 410 (2.4) |
| Asian | 83 (4.3) | 695 (4.0) |
| Other | 432 (22.6) | 3874 (22.3) |
| Body mass index, mean (SD), kg m−2 | 26.5 (6.7) | 27.2 (6.8) |
| Family history of breast cancer, n (%) | 855 (44.5) | 7497 (43.2) |
