Table 3.

Adjusted prevalence ratio (PR) and 95% CI for the association between infant soy formula feeding and ultrasound-detected fibroids at enrollment, Study of Environment, Lifestyle & Fibroids (SELF), 2010–2012.

Exposure	Fibroids[n (%)]	No fibroids[n (%)]	Age-adjusted [PR (95% CI)]	Multivariable-adjusteda [PR (95% CI)]
Soy formula
Never fed	306 (89)	1,049 (87)	1.0 (reference)	1.0 (reference)
Ever fed	39 (11)	159 (13)	1.0 (0.7, 1.3)	0.9 (0.7, 1.3)
aAdjusted for participant age and birth weight and maternal smoking, education, and any pregnancy complication of preexisting diabetes, gestational diabetes, pregnancy-related hypertension or preeclampsia.