Figure 4. Estimated preeclampsia risk differences per 100 women and 95% CI by race/ethnicity associated with hypothetical intervention reducing the pollutant levels to the 25^th percentile versus the observed levels by exposure characterization distance.

Note: Estimates shown for each pollutant averaged within 120-m and within 30-m of maternal residence at delivery. Models adjusted for maternal insurance type, age at delivery, age-squared, smoking history, parity, season of conception, proportion of census block with educational attainment less than high school, proportion of census block living below the poverty line. The 25^th percentile was 9.0 ppb for NO₂, 0.27 μg/m³ for BC, and 26.6 # × 10³/cm³ for UFP.