| Cases n (%) | Controls n (%) | OR 95% CI | |
| Still menstruating | 23 (42.6) | 46 (62.2) | 0.83 (0.26 to 2.6) |
| Oral contraceptive use ever | 36 (75.0) | 50 (74.6) | 1.4 (0.55 to 3.5) |
| Hormone replacement therapy ever | 14 (26.9) | 11 (14.9) | 1.38 (0.53 to 3.6) |
| Ever pregnant | 41 (74.6) | 48 (64.0) | 1.06 (0.44 to 2.55) |
| Breast-fed children | 22 (40.0) | 21 (28.8) | 1.41 (0.66 to 3.03) |
| Adverse pregnancy event | 15 (31.9) | 20 (36.4) | 0.81 (0.35 to 1.85) |
| Treated for fertility problems | 2 (3.8) | 13 (18.6) | 0.17 (0.04 to 0.79) |