Fig. 3
From: Toxic metal mixtures in private well water and increased risk for preterm birth in North Carolina
Results from the partial effects quantile-based g-computation modeling. Forest plot of aOR* for PTB associated with increasing all metal concentrations in private wells by one quartile (“Overall”), just the metals that had negative weights in the training set (“Negative direction”), and just the metals that had a positive weights in the training set (“Positive direction”). Models were adjusted for smoking, age, race/ethnicity, education, season of conception, tract-level poverty, tract-level nitrates and nitrites