Reproductive factor | Category | OR (95% CI) | p value |
---|---|---|---|
Age at menarche | > 12 years | 1 (reference) | – |
≤ 12 years | 0.95 (0.79–1.13) | 0.55 | |
Number of deliveries | 0 | 1 (reference) | – |
1–2 | 0.58 (0.38–0.90) | 0.01 | |
> 2 | 0.43 (0.27–0.68) | < 0.001 | |
Age at first deliverya | < 20 years | 1.65 (1.00–2.75) | 0.05 |
20–24 years | 1.06 (0.83–1.34) | 0.65 | |
25–29 years | 1 (reference) | – | |
30–34 years | 0.93 (0.70–1.23) | 0.60 | |
≥ v35 years | 1.11 (0.73–1.69) | 0.63 | |
Age at menopauseb | < 50 years | 0.77 (0.62–0.96) | 0.02 |
≥ 50 years | 1 (reference) | – | |
Use of hormonal contraceptives | No | 1 (reference) | – |
Yes | 0.81 (0.67–0.97) | 0.02 | |
Use of hormone replacement therapyb | No | 1 (reference) | – |
Yes | 1.00 (0.95–1.06) | 0.89 |