Table 3.
Association of adult physical abuse with breast cancer incidence
| Cases | Person-years | Multivariable IRR (95% CI)a | |
|---|---|---|---|
| No abuse across the life spanb | 359 | 146,801 | 1.00 (referent) |
| Physical abuse type (≥4 times) | |||
| Pushed, grabbed, or shoved me | 115 | 43,128 | 1.26 (1.03–1.54) |
| Threw something at me | 31 | 13,705 | 1.08 (0.75–1.55) |
| Kicked, bit, or punched me | 75 | 27,729 | 1.25 (0.98–1.59) |
| Hit me with hand or fist | 100 | 38,541 | 1.19 (0.96–1.47) |
| Choked or burned me | 24 | 7,933 | 1.46 (0.97–2.21) |
| Physically attacked me in other way | 63 | 22,835 | 1.27 (0.98–1.65) |
| Seriously harmed someone I love | 25 | 12,575 | 0.91 (0.61–1.35) |
a
Adjusted for age, education, age at menarche, BMI at age 18, parity, age at first birth, OC use, menopausal status, age at menopause, FH use, vigorous activity, smoking status, alcohol intake, and family history of breast cancer. Adjusted for sexual abuse
b
Reference group for all analyses