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The association between prenatal exposure to polycyclic aromatic hydrocarbons and birth weight: A meta-analysis

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  • Liren Yang
  • Li Shang
  • Shanshan Wang
  • Wenfang Yang
  • Liyan Huang
  • Cuifang Qi
  • Anil Gurcan
  • Zixuan Yang
  • Mei Chun Chung

Abstract

Background: Polycyclic aromatic hydrocarbons (PAHs) are a kind of endocrine disruptors, which can enter human body by the inhalation of PAH-containing matter and the ingestion of PAH-containing foodstuffs. Studies showed that PAHs can cross the placental barrier and might cause adverse effects on the fetus. Objectives: This meta-analysis aimed to estimate the associations between prenatal exposure to PAHs and birth weight. Methods: Articles published in English until May 8, 2020 and reported the effects of prenatal exposure to PAHs on birth weight were searched in multiple electronic databases including PubMed, the Web of Science, EMBASE and the Cochrane Library. The included studies were divided into three groups in accordance with the measurement of PAHs exposure. Then coefficient was extracted, conversed and synthesized by random-effects meta-analysis. And risk of bias was assessed for each study. Results: A total of 3488 citations were searched and only 11 studies were included finally after double assessment. We found that there were no association between PAH-DNA adducts in cord blood (low/high) (OR: 1.0, 95%CI: 0.97, 1.03), 1-hydroxy pyrene (1-HP) concentration in maternal urine (OR: 1.0, 95%CI: 0.97, 1.03) and prenatal maternal airborne PAHs exposure (OR: 0.97, 95%CI: 0.93, 1.01) and birth weight. However, we observed ethnicity may change the effects of PAHs exposure on birth weight. Conclusions: There is no significant relationship between prenatal exposure to PAHs and birth weight in our meta-analysis. Further studies are still needed for determining the effects of prenatal PAHs exposure on birth weight.

Suggested Citation

  • Liren Yang & Li Shang & Shanshan Wang & Wenfang Yang & Liyan Huang & Cuifang Qi & Anil Gurcan & Zixuan Yang & Mei Chun Chung, 2020. "The association between prenatal exposure to polycyclic aromatic hydrocarbons and birth weight: A meta-analysis," PLOS ONE, Public Library of Science, vol. 15(8), pages 1-15, August.
    • Handle: RePEc:plo:pone00:0236708
    DOI: 10.1371/journal.pone.0236708
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