Unweighted Estimates.

S3 Table shows the unweighted estimate results of the linear regression models estimating the association between nitrate measures and birth outcomes. The exposure column indicates the nitrate exposure estimated in the model. All linear regression models adjusted for maternal and paternal characteristics, county-year fixed effects, and year-month fixed effects. Standard errors reported in parentheses. Nitrate mg/L is measured as a continuous variable. All other exposures are modeled as binary. Gestational Age (weeks) and Birth weight (g = grams) and are continuous outcome variables. Preterm birth ( (XLSX)