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Exposure to Ambient Air Pollution and Risk of Childhood Cancers: A Population-Based Study in Tehran, Iran Publisher Pubmed



Seifi M1 ; Niazi S1, 2 ; Johnson G2 ; Nodehi V3 ; Yunesian M4, 5
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. International Laboratory for Air Quality and Health, Queensland University of Technology (QUT), Brisbane, Australia
  3. 3. Department of geography, Kharazmi University, Tehran, Iran
  4. 4. Center for Air Pollution Research (CAPR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Research Methodology and Data Analysis, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran

Source: Science of the Total Environment Published:2019


Abstract

The relationship between air pollution and childhood cancer is inconclusive. We investigated the associations between exposure to ambient air pollution and childhood cancers in Tehran, Iran. This project included children between 1 and 15 years-of-age with a cancer diagnosis by the Center for the Control of Non Communicable Disease (n = 161) during 2007 to 2009. Controls were selected randomly within the city using a Geographic Information System (GIS) (n = 761). The cases were geocoded based on exact home addresses. Air pollution exposure of cases and random controls were estimated by a previously developed Land Use Regression (LUR) model for the 2010 calendar year. The annual mean concentrations of Particulate Matter ≤ 10 μm (PM 10 ), nitrogen dioxide (NO 2 ) and sulfur dioxide (SO 2 ) in the locations of cancer cases were 101.97 μg/m 3 , 49.42 ppb and 38.92 ppb respectively, while in the random control group, respective mean exposures were 98.63 μg/m 3 , 45.98 ppb and 38.95 ppb. A logistic regression model was used to find the probability of childhood cancer per unit increase in PM 10 , NO 2 and SO 2 . We observed a positive association between exposures to PM 10 with childhood cancers. We did, however, observe a positive, but not statistically significant association between NO 2 exposure and childhood cancer. Our study is the first to highlight an association between air pollution exposure and childhood cancer risk in Iran, however these findings require replication through future studies. © 2018
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