Impacts of air pollution and noise on risk of preterm birth and stillbirth in London.

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ID: 67765
2019
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Abstract
Evidence for associations between ambient air pollution and preterm birth and stillbirth is inconsistent. Road traffic produces both air pollutants and noise, but few studies have examined these co-exposures together and none to date with all-cause or cause-specific stillbirths.To analyse the relationship between long-term exposure to air pollution and noise at address level during pregnancy and risk of preterm birth and stillbirth.The study population comprised 581,774 live and still births in the Greater London area, 2006-2010. Outcomes were preterm birth (<37 completed weeks gestation), all-cause stillbirth and cause-specific stillbirth. Exposures during pregnancy to particulate matter with diameter <2.5 μm (PM) and <10 μm (PM), ozone (O), primary traffic air pollutants (nitrogen dioxide, nitrogen oxides, PM from traffic exhaust and traffic non-exhaust), and road traffic noise were estimated based on maternal address at birth.An interquartile range increase in O exposure was associated with elevated risk of preterm birth (OR 1.15 95% CI: 1.11, 1.18, for both Trimester 1 and 2), all-cause stillbirth (Trimester 1 OR 1.17 95% CI: 1.07, 1.27; Trimester 2 OR 1.20 95% CI: 1.09, 1.32) and asphyxia-related stillbirth (Trimester 1 OR 1.22 95% CI: 1.01, 1.49). Odds ratios with the other air pollutant exposures examined were null or <1, except for primary traffic non-exhaust related PM, which was associated with 3% increased odds of preterm birth (Trimester 1) and 7% increased odds stillbirth (Trimester 1 and 2) when adjusted for O. Elevated risk of preterm birth was associated with increasing road traffic noise, but only after adjustment for certain air pollutant exposures.Our findings suggest that exposure to higher levels of O and primary traffic non-exhaust related PM during pregnancy may increase risk of preterm birth and stillbirth; and a possible relationship between long-term traffic-related noise and risk of preterm birth. These findings extend and strengthen the evidence base for important public health impacts of ambient ozone, particulate matter and noise in early life.
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smith2019impactsenvironment Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Smith, Rachel B;Beevers, Sean D;Gulliver, John;Dajnak, David;Fecht, Daniela;Blangiardo, Marta;Douglass, Margaret;Hansell, Anna L;Anderson, H Ross;Kelly, Frank J;Toledano, Mireille B;
Journal Environment international
Year 2019
DOI
S0160-4120(19)31473-4
URL
Keywords
particulate matter vehicle exhaust ozone pregnancy nitrogen dioxide traffic nitrogen oxides

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