borderline significancep = 0.08
Assuming causality, the adjusted estimates of the proportion of mediation showed that placental iodine concentrations explained 26% with borderline significance (IE: −0.33; 95%CI: −0.70–0.04; p = 0.08) of the association between weeks 29–35 of PM 2.5 exposure and cord blood FT 4 levels ( Fig. 2 ).