Maternal exposure to air pollution and birth outcomes

Project Abstract

Maternal exposure to air pollution during pregnancy has become a significant public health concern due to its potential impact on birth outcomes. This research aims to investigate the relationship between maternal exposure to air pollution and various birth outcomes. The study will utilize a retrospective cohort design and will include pregnant women from diverse geographic regions to capture different levels of air pollution exposure. Multiple air pollutants will be considered in the analysis, including particulate matter (PM), nitrogen dioxide (NO2), sulfur dioxide (SO2), and ozone (O3). Exposure to these pollutants will be assessed using data from air quality monitoring stations and satellite-based measurements to create spatially resolved exposure estimates for each participant. Additionally, maternal residential proximity to major sources of pollution, such as highways or industrial areas, will be taken into account. Various birth outcomes will be examined, including preterm birth, low birth weight, small for gestational age, and birth defects. Statistical analyses will be conducted to assess the association between maternal exposure to air pollution and these birth outcomes while controlling for potential confounding factors such as maternal age, socioeconomic status, smoking status, and pre-existing medical conditions. Furthermore, subgroup analyses will be performed to explore whether certain populations, such as women living in urban areas or those with pre-existing health conditions, are more vulnerable to the adverse effects of air pollution on birth outcomes. Sensitivity analyses will also be conducted to test the robustness of the findings and evaluate the impact of different exposure assessment methods. The findings from this research are expected to provide valuable insights into the potential impact of maternal exposure to air pollution on birth outcomes. Understanding these relationships is crucial for developing targeted interventions and policies aimed at reducing air pollution levels and protecting maternal and child health. By identifying the most vulnerable populations and the specific pollutants that pose the greatest risk, public health efforts can be tailored to mitigate the adverse effects of air pollution on birth outcomes and improve overall maternal and child health outcomes.

Project Overview

<p> </p><p>The knowledge about air pollution effects on birth weight, prematurity, and small for gestational age (SGA) in low-exposure areas is insufficient.Maternal Exposure</p><p>OBJECTIVES:</p><p>The aim of this birth cohort study was to investigate whether low-level exposure to air pollution was associated with prematurity and fetal growth and whether there are sex-specific effects.Maternal Exposure</p><p>METHOD:</p><p>We combined high-quality registry information on 81,110 births with individually modeled exposure data at residence for nitrogen oxides (NO(x)) and proximity to roads with differing traffic density. The data were analyzed by logistic and linear regression with and without potential confounders.Maternal Exposure</p><p>RESULTS: <strong>We observed an increased risk for babies being SGA when we compared highest and lowest NO(x) quartiles, adjusting for maternal age, smoking, sex, and year of birth. After additional adjustment for maternal country of origin and parity (which were highly intercorrelated), the increase was no longer statistically significant. However, in subgroup analyses when we compared highest and lowest NO(x) quartiles we still observed an increased risk for SGA for girls [odds ratio (OR)=1.12; 95% confidence interval (CI), 1.01-1.24); we also observed increased risk among mothers who had not changed residency during pregnancy (OR=1.09; 95% CI, 1.01-1.18). The confounders with the greatest impact on SGA were parity and country of origin. Concerning prematurity, the prevalence was lower in the three higher NO(x) exposure quartiles compared with the lowest category.Maternal Exposure </strong></p> <br><p></p>