Effect of early life exposure to air pollution on development of childhood asthma

Project Abstract

Childhood asthma is a significant public health concern worldwide, with environmental factors playing a crucial role in its development. One such factor is early life exposure to air pollution, which has been associated with an increased risk of developing asthma in children. This research project aims to investigate the effect of early life exposure to air pollution on the development of childhood asthma. The study will utilize a cohort design, following a group of children from birth to early childhood to assess their exposure to air pollutants such as particulate matter, nitrogen dioxide, and ozone. Health outcomes including asthma diagnosis, respiratory symptoms, and lung function will be monitored over time. Data on potential confounders such as maternal smoking, indoor air quality, and socioeconomic status will also be collected and analyzed. By examining the association between early life exposure to air pollution and childhood asthma development, this study seeks to contribute to the understanding of the environmental determinants of asthma. Findings from this research can inform public health policies aimed at reducing air pollution levels and implementing interventions to protect children from the adverse effects of poor air quality on respiratory health. Overall, this project will provide valuable insights into the impact of air pollution on childhood asthma and help identify high-risk populations that may benefit from targeted interventions. The results of this study have the potential to influence policies aimed at improving air quality and reducing the burden of asthma in children, ultimately leading to better respiratory health outcomes in the pediatric population.

Project Overview

<p> </p><p>&nbsp;BACKGROUND:</p><p>There is increasing recognition of the importance of early environmental exposures in the development of childhood asthma. Outdoor air pollution is a recognized asthma trigger, but it is unclear whether exposure influences incident disease. We investigated the effect of exposure to ambient air pollution in utero and during the first year of life on risk of subsequent asthma diagnosis in a population-based nested case-control study.</p><p>METHODS:</p><p>We assessed all children born in southwestern British Columbia in 1999 and 2000 (n = 37,401) for incidence of asthma diagnosis up to 34 years of age using outpatient and hospitalization records. Asthma cases were age- and sex-matched to five randomly chosen controls from the eligible cohort. We estimated each individual’s exposure to ambient air pollution for the gestational period and first year of life using high-resolution pollution surfaces derived from regulatory monitoring data as well as land use regression models adjusted for temporal variation. We used logistic regression analyses to estimate effects of carbon monoxide, nitric oxide, nitrogen dioxide, particulate matter RESULTS:</p><p>A total of 3,482 children (9%) were classified as asthma cases. We observed a statistically significantly increased risk of asthma diagnosis with increased early life exposure to CO, NO, NO2, PM10, SO2, and black carbon and proximity to point sources. Traffic-related pollutants were associated with the highest risks: adjusted odds ratio = 1.08 (95% confidence interval, 1.041.12) for a 10-microg/m3 increase of NO, 1.12 (1.071.17) for a 10-microg/m3 increase in NO2, and 1.10 (1.061.13) for a 100-microg/m3 increase in CO. These data support the hypothesis that early childhood exposure to air pollutants plays a role in development of asthma.</p> <br><p></p>