Fig. 4

Association between select pre-pregnancy serum polychlorinated biphenyl (PCB) congeners and gestational diabetes stratified by total serum lipids estimated from the Phillips 1989 equation (total serum lipids < median [599.6 mg/dl] versus total serum lipids ≥ median [599.6 mg/dl]). Values are odds ratios and 95 % confidence intervals from multivariable binary logistic regression, adjusted for age and waist-to-height ratio