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. 2021 Feb 4;129(2):027002. doi: 10.1289/EHP7331

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EHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted.

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Figure 2 is a bar graph plotting births (percentage), ranging from 0 to 20 in increments of 5 (y-axis) across Nitrate (milligram per liter), ranging from 0 to 50 in increments of 10 (x-axis). — The distribution of the pregnancy average nitrate exposure in the birth weight study population, truncated to those with $\leq 50 mg / L$ average nitrate exposure ( $n = 818, 539$ ). Note: 10th percentile: $0.5 mg / L {NO}_{3}^{-}$ ; 90th percentile: $10.7 mg / L {NO}_{3}^{-}$ . Main birth weight model covariates included: maternal age, calendar year, sex, gravidity, maternal smoking, maternal education, maternal income, maternal employment status, region, and urbanicity.