Characteristic | N | Pre-menopausal breast cancer | Postmenopausal breast cancera | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall | ER+ | ER− | Overall | ER+ | ER− | ||||||||
Cases | HR (95% CI) | Cases | HR (95% CI) | Cases | HR (95% CI) | Cases | HR (95% CI) | Cases | HR (95% CI) | Cases | HR (95% CI) | ||
Birthweight, per 500 g | 125,352 | 1120 | 1.03 (0.97–1.09) | 865 | 1.03 (0.96–1.09) | 255 | 1.03 (0.92–1.16) | 4392 | 1.02 (0.99–1.05) | 3699 | 1.03 (1.00–1.06) | 693 | 0.97 (0.90–1.04) |
Puberty markers, per year | |||||||||||||
Age at OGS | 70,538 | 710 | 0.95 (0.89–1.00) | 566 | 0.94 (0.88–1.00) | 144 | 0.98 (0.86–1.11) | 3703 | 0.98 (0.96–1.01) | 3104 | 0.98 (0.95–1.01) | 599 | 1.01 (0.95–1.08) |
Age at PHV | 70,538 | 710 | 0.94 (0.89–1.00) | 566 | 0.94 (0.88–1.01) | 144 | 0.95 (0.83–1.08) | 3703 | 0.99 (0.96–1.02) | 3104 | 0.98 (0.96–1.01) | 599 | 1.01 (0.94–1.08) |