To examine how the pollutants selected
a priori compared with other pollutants in
their relationship with ASD, we calculated
ORs of ASD for the highest versus lowest
quintile of exposure for each pollutant in the
U.S. EPA database, adjusted for HAP year,
tract median income, tract percent college
educated, maternal age at birth, child’s year
of birth, and maternal parents’ education [see
Supplemental Material, Table S5 (http://
dx.doi.org/10.1289/ehp.1206187)].