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Odds ratios for quartiles of average daily dietary folate intake during the periconceptual
period showed a reduced risk for both the third and fourth quartiles (30%), when compared
with the lowest quartile - 21 women who took folic acid preconceptually, 7 women without food frequency data, and five additional women without obesity data were excluded † Adjusted for maternal age, education, obesity, and previous still birth or miscarriage ‡Referent |