Table 1.
Relative risk estimates for the six variables used to estimate lifetime risk of ovarian cancer
| Risk Factor | OR | 95% CI | ||
|---|---|---|---|---|
| Oral contraceptive use | ||||
| Never | 1.00 | |||
| 1-4.99 years | 0.62 | 0.56 | - | 0.69 |
| 5+ years | 0.40 | 0.36 | - | 0.44 |
| Parity | ||||
| None | 1.00 | |||
| 1 birth | 0.76 | 0.66 | - | 0.88 |
| 2+ births | 0.58 | 0.51 | - | 0.65 |
| Tubal ligation | ||||
| No | 1.00 | |||
| Yes | 0.74 | 0.67 | - | 0.83 |
| Endometriosis | ||||
| No | 1.00 | |||
| Yes | 1.53 | 1.30 | - | 1.81 |
| First-degree family history | ||||
| No | 1.00 | |||
| Yes | 2.09 | 1.70 | - | 2.57 |
| Genetic risk score | ||||
| Quintile 1 | 1.00 | |||
| Quintile 2 | 1.25 | 1.22 | - | 1.28 |
| Quintile 3 | 1.44 | 1.38 | - | 1.49 |
| Quintile 4 | 1.66 | 1.58 | - | 1.75 |
| Quintile 5 | 2.12 | 1.99 | - | 2.27 |