1. Associations of residential greenness and ambient air pollution with overweight and obesity in older adults.
- Author
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Ye L, Zhou J, Tian Y, Cui J, Chen C, Wang J, Wang Y, Wei Y, Ye J, Li C, Chai X, Sun C, Li F, Wang J, Guo Y, Jaakkola JJK, Lv Y, Zhang J, and Shi X
- Subjects
- Aged, Humans, Asian People, Obesity epidemiology, Obesity etiology, Air Pollutants adverse effects, Protective Factors, China, Air Pollution adverse effects, Overweight epidemiology, Overweight etiology, Particulate Matter adverse effects, Neighborhood Characteristics, Plant Dispersal
- Abstract
Objective: This study aimed to examine the impact of greenness and fine particulate matter <2.5 μm (PM
2.5 ) on overweight/obesity among older adults in China., Methods: A total of 21,355 participants aged ≥65 years were included from the Chinese Longitudinal Healthy Longevity Survey between 2000 and 2018. Normalized difference vegetation index (NDVI) with a radius of 250 m and PM2.5 in a 1 × 1-km grid resolution were calculated around each participant's residence. Cox proportional hazards models were used to estimate the effects of NDVI and PM2.5 on overweight/obesity. Interaction and mediation analyses were conducted to explore combined effects., Results: The study observed 1895 incident cases of overweight/obesity over 109,566 person-years. For every 0.1-unit increase in NDVI the hazard ratio of overweight/obesity was 0.91 (95% CI: 0.88-0.95), and for every 10-μg/m3 increase in PM2.5 the hazard ratio was 1.11 (95% CI: 1.07-1.14). The effect of NDVI on overweight/obesity was partially mediated by PM2.5 , with a relative mediation proportion of 20.10% (95% CI: 1.63%-38.57%)., Conclusions: Greenness exposure appears to lower the risk of overweight/obesity in older adults in China, whereas PM2.5 , acting as a mediator, partly mediated this protective effect., (© 2023 The Obesity Society.)- Published
- 2023
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