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  3. Research Domains
  5. Engineering
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  9. Air Pollution Modelling And Control
  11. Outdoor Light At Night Is A Modifiable Environmental Factor For Metabolic Syndrome: The 33 Communities Chinese Health Study (33cchs).
  1. Home
  3. Research Domains
  5. Engineering
  7. Environmental Engineering
  9. Air Pollution Modelling And Control
  11. Outdoor Light At Night Is A Modifiable Environmental Factor For Metabolic Syndrome: The 33 Communities Chinese Health Study (33cchs).

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Outdoor light at night is a modifiable environmental factor for metabolic syndrome: The 33 Communities Chinese Health Study (33CCHS).

Li-Wen Hu1, Yan-Chen Gong1, Hong-Xing Zou1

  • 1Joint International Research Laboratory of Environment and Health, Ministry of Education, Guangdong Provincial Engineering Technology Research Center of Environmental Pollution and Health Risk Assessment, Department of Occupational and Environmental Health, School of Public Health, Sun Yat-Sen University, Guangzhou 510080, China.

The Science of the Total Environment
|September 13, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Exposure to outdoor artificial light at night (LAN) is linked to a higher risk of metabolic syndrome (MetS). This environmental factor may be a key target for future public health strategies to combat MetS.

Keywords:
Blood pressureFasting blood glucoseLight at nightMetabolic syndrome

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Area of Science:

  • Environmental Health
  • Epidemiology
  • Public Health

Background:

  • Metabolic syndrome (MetS) is a growing global health concern requiring identification of modifiable environmental factors.
  • Outdoor artificial light at night (LAN) affects circadian rhythms and metabolic processes, but its link to MetS needs more research.

Purpose of the Study:

  • To investigate the association between long-term outdoor LAN exposure and the prevalence of MetS and its components in adults.
  • To explore potential effect modification by demographic and behavioral factors on the LAN-MetS relationship.

Main Methods:

  • Utilized data from 15,477 adults in the 33 Communities Chinese Health Study (2009).
  • Assessed annual outdoor LAN exposure using satellite data (DMSP-OLS).
  • Employed generalized linear mixed effect models to analyze the association between LAN exposure quartiles and MetS components (WC, TG, BP, FBG, HDL-C).
Triglycerides
Waist circumference

Main Results:

  • A significant positive association was observed between increasing quartiles of outdoor LAN exposure and MetS prevalence (Q2-Q4 ORs: 1.43-1.52).
  • Adverse associations were also found for elevated blood pressure, triglycerides, and fasting blood glucose.
  • The association between LAN exposure and MetS was stronger in individuals without habitual exercise.

Conclusions:

  • Long-term exposure to outdoor artificial light at night is a significant environmental risk factor for metabolic syndrome.
  • LAN exposure may represent a modifiable target for public health interventions aimed at preventing MetS.