Associations between residential proximity to oil and gas extraction and hypertensive conditions during pregnancy: a difference-in-differences analysis in Texas, 1996–2009

Abstract Background Oil and gas extraction produces air pollutants that are associated with increased risks of hypertension. To date, no study has examined residential proximity to oil and gas extraction and hypertensive conditions during pregnancy. This study quantifies associations between residen...

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Bibliographic Details
Published in:	International journal of epidemiology 2022-05, Vol.51 (2), p.525-536
Main Authors:	Willis, Mary D, Hill, Elaine L, Kile, Molly L, Carozza, Susan, Hystad, Perry
Format:	Article
Language:	eng
Subjects:	Adult Air Pollutants - adverse effects Air Pollutants - analysis Eclampsia - epidemiology Environmental Epidemiology Female Humans Hypertension, Pregnancy-Induced - epidemiology Pregnancy Retrospective Studies Texas - epidemiology
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Summary:	Abstract Background Oil and gas extraction produces air pollutants that are associated with increased risks of hypertension. To date, no study has examined residential proximity to oil and gas extraction and hypertensive conditions during pregnancy. This study quantifies associations between residential proximity to oil and gas development on gestational hypertension and eclampsia. Methods We utilized a population-based retrospective birth cohort in Texas (1996–2009), where mothers reside 1–2 or >2–3 km) or far (≥3–10 km) from an active or future drilling site. Results Among pregnant women residing 0–1 km from an active oil or gas extraction site, we estimate 5% increased odds of gestational hypertension [95% confidence interval (CI): 1.00, 1.10] and 26% increased odds of eclampsia (95% CI: 1.05, 1.51) in adjusted models. This association dissipates in the 1- to 3-km buffer zones. In restricted models, we find elevated odds ratios among maternal ages ≤35 years at delivery, maternal non-Hispanic White race, ≥30 lbs gained during pregnancy, nulliparous mothers and maternal educational attainment beyond high school. Conclusions Living within 1 km of an oil or gas extraction site during pregnancy is associated with increased odds of hypertensive conditions during pregnancy.
ISSN:	0300-5771 1464-3685