The association between outdoor light at night exposure and adult obesity in Northeastern China

Yu Jie Xu, Zhong Yue Xie, Yan Chen Gong, Le Bing Wang, Yin Yu Xie, Li Zi Lin, Xiao Wen Zeng, Bo Yi Yang, Wangjian Zhang, Ru Qing Liu, Li Wen Hu, Gongbo Chen, Guang Hui Dong

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4 Citations (Scopus)

Abstract

Previous studies have linked exposure to light at night (LAN) with various health outcomes, but evidence is limited for the LAN-obesity association. Thestudy analysed data from 24,845 participants of the 33 Communities Chinese Health Study and obesity (BMI ≥28 kg/m2) was defined according to the Working Group on Obesity in China. The Global Radiance Calibrated Nighttime Lights data were used to estimate participants’ LAN exposure. The mixed-effect regression models examined the LAN-BMI and LAN-obesity association. We found that higher LAN exposure was significantly associated with greater BMI and higher risk of obesity. Changes of BMI and the odds ratios (ORs) of obesity and 95% confidence intervals (CIs) for 2nd, 3rd, and 4th against the 1st quartile of LAN exposure were 0.363 (0.208, 0.519), 0.364 (0.211, 0.516) and 0.217 (0.051, 0.383); 1.228 (1.099, 1.371), 1.356 (1.196, 1.538) and 1.269 (1.124, 1.433), respectively. Age and regular exercise showed significant modification effects on the LAN-obesity association.

Original languageEnglish
Pages (from-to)708-718
Number of pages11
JournalInternational Journal of Environmental Health Research
Volume34
Issue number2
DOIs
Publication statusPublished - 2023
Externally publishedYes

Keywords

  • adults
  • BMI
  • Light at night
  • obesity

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