Effect of individual and combined ambient air pollutants exposure on the risk of preeclampsia: a retrospective cohort study in Tangshan, China.

BMC Public Health · 2026 · PMC13154655 · PMID 41906096

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a decreasing trendno p-value reported

A decreasing trend was observed in the concentrations of PM 10 , PM 2.5 , SO 2 , NO 2 , and CO, with distinct seasonal patterns emerging in which pollutant levels generally peaked during colder months, whereas O 3 concentrations reached their maximum in warmer seasons.

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borderline significanceno p-value reported

While SO 2 , NO 2 , and O 3 showed no statistically significant effects on PE, NO 2 exhibited borderline significance.

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