Summarized odds ratios with 95% confidence intervals for the association between genetic polymorphisms in the folate pathway and Neural Tube Defects risk.

aNumber of studies. Abbreviation: OR, odds ratio; R, random-effects model; F, fix-effects model.多项研究。缩写说明：OR（odds ratio，比值比）；R（random-effects model，随机效应模型）；F（fix-effects model，固定效应模型）。