From: Body mass index, mammographic density, and breast cancer risk by estrogen receptor subtype
 | Normal/underweight BMI < 25 kg/m2 | Overweight/obese BMI ≥ 25 kg/m2 |  | ||||
---|---|---|---|---|---|---|---|
 | Cases | Controls | Percent density OR per S.D. (95% CI)a | Cases | Controls | Percent density OR per S.D. (95% CI)a | P int b |
Premenopausal | 383 | 979 | 1.83 (1.54–2.18) | 227 | 528 | 1.46 (1.22–1.74) | 0.07 |
Postmenopausal HT user | 281 | 678 | 1.64 (1.38–1.95) | 198 | 446 | 1.61 (1.32–1.95) | 0.84 |
Postmenopausal HT non-user | 279 | 1029 | 1.46 (1.24–1.70) | 455 | 1060 | 1.48 (1.30–1.69) | 0.94 |