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Associations between the chemical composition of PM2.5 and gestational diabetes mellitus

Yi Zheng1, Xiaoxiao Wen1, Jiang Bian2

  • 1Department of Epidemiology, College of Public Health and Health Professions and College of Medicine, University of Florida, Gainesville, FL, USA.

Environmental Research
|November 20, 2020
PubMed
Abstract

Insights

Exposure to fine particulate matter (PM2.5) and its components during pregnancy is linked to gestational diabetes mellitus (GDM). Ammonium and organic matter during the second trimester showed the strongest associations with GDM risk.

Area of Science:

  • Environmental Health
  • Reproductive Health
  • Epidemiology

Background:

  • Fine particulate matter (PM2.5) is a complex air pollutant with varying chemical compositions.
  • While PM2.5 exposure is linked to gestational diabetes mellitus (GDM), the impact of specific PM2.5 components on GDM risk remains unclear.
  • Understanding these relationships is crucial for public health interventions.

Purpose of the Study:

  • To investigate the association between PM2.5 components and GDM.
  • To identify critical exposure windows during pregnancy for PM2.5 and its constituents.
  • To differentiate the effects of various PM2.5 chemical components on GDM development.

Main Methods:

  • Utilized Florida Vital Statistics Birth Records from 2005-2015.
  • Employed a validated geoscience model to estimate individual pregnancy exposures to PM2.5 and its components (sulfate, ammonium, nitrate, organic matter, black carbon, mineral dust, sea salt).
  • Applied distributed lag models to analyze associations and pinpoint critical exposure periods.

Main Results:

  • A total of 2,078,669 pregnancies were analyzed.
  • Positive associations were found between PM2.5 exposure and GDM, particularly during the second trimester.
  • Specific components like ammonium (NH4+), organic matter (OM), and black carbon (BC) showed positive associations, with peak effects between 21-24 weeks of gestation. Mineral dust (DUST) and sea salt (SS) exhibited negative associations.

Conclusions:

  • PM2.5 components, notably ammonium and organic matter, during the second trimester are associated with increased GDM risk.
  • The period between 21-24 weeks of pregnancy appears critical for PM2.5 exposure related to GDM.
  • Further research is recommended to validate these findings and elucidate the underlying biological mechanisms.
Keywords:
Gestational diabetes mellitusPM(2.5) compositionSusceptible window of exposure

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