ABSTRACT
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. The study 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. 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.
This study examines the value relevance of international public sector accounting standards adoption in the Lagos state Civil...
BACKGROUND OF THE STUDY
THE STUDENT’S INDUSTRIAL WORK EXPERIENCE SCHEME
The students in...
Abstract: This study examines strategies for recruiting and retaining qualified vocational...
ABSTRACT
The aim of this study is to examine the effect of twitter ban on humanitarian services and soc...
ABSTRACT
During the periods of 1960s through 1980s, poor health outcomes (illness and deaths) resulting from strokes, hypertension, high...
Abstract
The performance in Biology in public secondary schools has been poor and the purpose of this study was t...
ABSTRACT
A study was made to determine the the prevalence of malaria parasite among anti-natal patients...
ABSTRACT
This case study is “...
SCOPE OF THE STUDY
This research primarily cuts across Nigeria as a nation. It focuses on the Nigerian law and Int...
ABSTRACT
The increasing sophistication of malware has made detecting and defending against new strains a major challenge for cybers...