Association between medium to long term ambient PM 2.5 exposure and overweight/obesity among primary and secondary school students
10.16835/j.cnki.1000-9817.2025222
- VernacularTitle:校园周边中长期PM 2.5 暴露与中小学生超重肥胖的关联
- Author:
LUO Yuemei, ZHANG Dengcheng, QIN Yang, LU Wutao, JIANG Jianuo, CHEN Li, GUO Tongjun,〖JZ〗 MA Jun, DONG Yanhui, LI Yan
1
Author Information
1. School Health Department, Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention Nanning 530028, China
- Publication Type:Journal Article
- Keywords:
Particulate matter;
Overweight;
Obesity;
Regression analysis;
Students
- From:
Chinese Journal of School Health
2025;46(7):937-940
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the association between medium to long term PM 2.5 exposure around school areas and overweight/obesity among primary and secondary school students in Guangxi, providing data support and theoretical foundations for scientifically addressing overweight and obesity in primary and secondary school students.
Methods:From September to November 2023, a stratified cluster random sampling method was employed to select 251 183 students aged 7-18 years (grade 1 to grade 12) from 14 prefecture level cities (111 districts and counties) in Guangxi. PM 2.5 mass concentration data were obtained from the Tracking Air Pollution in China (TAP) dataset. Preliminary comparative analysis was conducted using the Mann-Whitney U test, while binary Logistic regression models were applied to quantify the relationship between PM 2.5 exposure and overweight/obesity. Restricted cubic spline analysis was further utilized to examine the nonlinear association between PM 2.5 concentration and overweight/obesity risk.
Results:The detection rate of overweight/obesity among Guangxi students in 2023 was 19.5%. The median PM 2.5 concentration in the year prior to the study was higher in the overweight/obesity group (23.22 μg/m 3) compared to the non overweight/obesity group (22.63 μg/m 3) ( Z=-15.66, P <0.01), and consistent trends were observed across gender (male/female) and educational stage (primary/junior/senior high school) subgroups (all P <0.01). Binary Logistic regression revealed that for every 10 μg/m 3 increase in the annual average PM 2.5 concentration, the risk of overweight/obesity increased by 12% ( OR=1.12, 95%CI=1.09- 1.15 , P <0.01). Restricted cubic spline analysis indicated a nonlinear relationship between monthly PM 2.5 levels and overweight/obesity risk ( P trend <0.01). Below 22.68 μg/m 3, PM 2.5 exposure showed no significant association with obesity risk; above the threshold, the risk increased with rising PM 2.5 levels.
Conclusion:Medium to long term PM 2.5 exposure around school environments is significantly associated with overweight/obesity among primary and secondary school students.
