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Ambient air pollution and the prevalence of obesity in Chinese children: The Seven Northeastern Cities (SNEC) Study †
Copyright © 2012 The Obesity Society
Conflict of interest: The authors declare that they have no conflict of interest.
- Accepted manuscript online: 30 NOV 2012 08:59AM EST
- Manuscript Accepted: 15 NOV 2012
- Manuscript Revised: 13 NOV 2012
- Manuscript Received: 11 JUL 2012
- China Environmental Protection Foundation. Grant Number: CEPF2008-123-1-5
- Cited By
This study is to evaluate the association between air pollution and the prevalence of overweight and obesity.
Design and Methods:
The population consisted of 30,056 children (aged 2 to 14 years), randomly selected from 25 districts in Northeast China. Child weight and height were measured, and exposures to particulate matter with an aerodynamic diameter ≤10 µm (PM10), sulfur dioxide (SO2), nitrogen dioxides (NO2), and Ozone (O3) were estimated from data collected at monitoring stations in the 25 districts. Using two-level logistic models, we examined the association between the exposure and the prevalence of overweight and obesity.
Among the study children, 12.3% (3,704) were overweight and 14.1% (4,233) were obese. After adjusting for confounding factors, an increased prevalence of obesity was associated with an interquartile range increase in PM10 (31 μg/m3 ; odds ratio (ORs)=1.19; 95% confidence interval (CI): 1.11-1.26), SO2 (7.4 ppb; ORs=1.11; 95%CI: 1.03-1.20, NO2 (5.3 ppb; ORs=1.13; 95%CI: 1.04-1.22), and O3 (11.5 ppb; ORs=1.14; 95%CI: 1.04-1.24). Prevalence of overweight increased with an interquartile range increase in O3 (11.5 ppb; ORs=1.09; 95%CI: 1.03-1.15).
This study suggests that air pollution is positively associated with an increased likelihood of obesity /or overweight in children.