Long-term exposure to ambient air pollution (including PM1) and metabolic syndrome: The 33 Communities Chinese Health Study (33CCHS)

Mar 5, 2018Environmental research

Long-term exposure to outdoor air pollution, including fine particles, linked to metabolic syndrome in Chinese communities

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Abstract

The prevalence of metabolic syndrome (MetS) was 30.37% among 15,477 adults evaluated in China.

Long-term exposure to various air pollutants is associated with an increased risk of developing metabolic syndrome.
For every 10 µg/m³ increase in particulate matter (PM) and other pollutants measured, the odds of MetS increase, with the strongest association found for nitrogen dioxide (odds ratio = 1.33).
The associations were more pronounced in males, individuals under 50 years of age, and those with higher incomes.
Lifestyle factors such as smoking, drinking, and frequent consumption of sugar-sweetened soft drinks may amplify the risk of MetS in relation to air pollution exposure.

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Little evidence exists about the effects of long-term exposure to ambient air pollution on metabolic syndrome (MetS). This study aimed to determine the association between long-term ambient air pollution and MetS in China. A total of 15,477 adults who participated in the 33 Communities Chinese Health Study (33CCHS) in 2009 were evaluated. MetS was defined based on the recommendation by the Joint Interim Societies. Exposure to air pollutants was assessed using data from monitoring stations and a spatial statistical model (including particles with diameters ≤ 1.0 µm (PM), ≤ 2.5 µm (PM), and ≤ 10 µm (PM), sulfur dioxide (SO), nitrogen dioxide (NO), and ozone (O)). Two-level logistic regression analyses were utilized to assess the associations between air pollutants and MetS. The prevalence of MetS was 30.37%. The adjusted odds ratio of MetS per 10 µg/mincrease in PM, PM, PM, SO, NO, and Owere 1.12 (95% CI = 1.00-1.24), 1.09 (95% CI = 1.00-1.18), 1.13 (95% CI = 1.08-1.19), 1.10 (95% CI = 1.02-1.18), 1.33 (95% CI = 1.12-1.57), and 1.10 (95% CI = 1.01-1.18), respectively. Stratified analyses indicated that the above associations were stronger in participants with the demographic variables of males, < 50 years of age, and higher income, as well as with the behavioral characteristics of smoking, drinking, and consuming sugar-sweetened soft drinks frequently. This study indicates that long-term exposure to ambient air pollutants may increase the risk of MetS, especially among males, the young to middle aged, those of low income, and those with unhealthy lifestyles. 1 2.5 10 2 2 3 1 2.5 10 2 2 3 3

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Long-term exposure to ambient air pollution (including PM1) and metabolic syndrome: The 33 Communities Chinese Health Study (33CCHS)

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