Table 3.
Associations between soy isoflavone intake (mg per day) and fertility (at least one live child) in the Adventist Health Study-2
| Isoflavone intake (mg/day) | Number of women/parous women | Estimated relative risk (95% CI) for giving birth to at least one live child |
|---|---|---|
| <10 | 3,808/3,014 | 1.0 |
| 10–19 | 1,226/950 | 0.99 (0.96, 1.02) |
| 20–29 | 850/661 | 0.99 (0.96, 1.02) |
| 30–39 | 492/377 | 0.97 (0.93, 1.02) |
| 40–49 | 308/239 | 0.98 (0.93, 1.03) |
| 50+ | 528/384 | 0.96 (0.92, 1.01) |
| All | 7,212/5,625 | |
| P-value for linear trend | 0.05 |
Notes: Adjusted for age when completing the lifestyle questionnaire, educational level and marital status. Women aged 41–50 years when completing the lifestyle questionnaire.
Abbreviation: CI, confidence interval.