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Reduced Fertility in Association With Ovarian Cancer Risk in the Netherlands Cohort Study on Diet and Cancer, 1986–2002
| No. of Cases | Person-Years in the Subcohort | HRa | 95% CI | |
| Time to pregnancyb | 282 | 28,017.8 | 1.04 | 0.99, 1.09 |
| Nulliparity among ever-married womenc | 39 | 5,961.0 | 1.04 | 0.65, 1.68 |
Abbreviations: CI, confidence interval; HR, hazard ratio.
Adjusted for age.
Calculated as time between marriage and first birth (in years).
Ever-married women versus never-married women.
