Exposure to air pollution and prevalence of metabolic syndrome: A nationwide study in China from 2011 to 2015

For every 10 μg/m³ increase in nitrogen dioxide, the odds of metabolic syndrome increase by 2.276.

• Sustained exposure to air pollutants is associated with a higher prevalence of metabolic syndrome.
• Adjusted odds ratios indicate that for every 10 μg/m³ increase, nitrogen dioxide is linked to a 2.276 increase in odds of metabolic syndrome.
• Particulate matter with diameters of 1.0 μm, 2.5 μm, and 10 μm also show associations with metabolic syndrome, with odds ratios of 1.207, 1.027, and 1.027, respectively.
• Significant associations are observed between nitrogen dioxide and components of metabolic syndrome, including central obesity, high blood pressure, elevated fasting glucose, and low high-density lipoprotein cholesterol.
• Age significantly modifies the relationship between nitrogen dioxide and the prevalence of metabolic syndrome.

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