Abstract
Objective
Given the potential of organochlorine pesticides (OCPs) to disrupt metabolic health, we aimed to explore their association with obesity and to explore the potential bidirectional mediating relationships involving metabolic health indicators among 894 rural Chinese adults with prediabetes.
Methods
A total of 894 individuals were included in this cross-sectional study. The associations of plasma OCPs on obesity and obese anthropometric measurements were assessed by generalized linear regression models for single exposure, and quantile g-computation (QGC) and LASSO regression for mixed exposure. The potential contributions of multiple health indicators to observed associations were assessed through mediation analysis. Exploratory bidirectional mediation analysis was employed to assess two potential pathways: (1) whether metabolic health indicators mediate the association between OCP exposure and obesity, and (2) whether obesity mediates the relationship between OCP exposure and metabolic health indicators.
Results
We discovered that β-Benzene hexachloride (β-BHC) and p,p’-Dichlorodiphenyldichloroethylene (p,p’-DDE) were related to obesity for single exposure. QGC and LASSO demonstrated that OCPs were positively correlated with a higher likelihood of obesity for mixed exposure, with β-BHC being the primary contributor. Exploratory mediation analysis found that obesity and metabolic-related indicators play a bidirectional mediating role in the association with OCPs, mainly involving systolic blood pressure (SBP), diastolic blood pressure (DBP), total cholesterol (TC), triglyceride (TG), high-density lipoprotein-Cholesterol (HDL-C), low-density lipoprotein-Cholesterol (LDL-C), alkaline phosphatase (ALP), alanine aminotransferase (ALT), and aspartate aminotransferase/alanine aminotransferase (AST/ALT).
Conclusions
In this cross-sectional study, we found that OCPs exposure may increase obesity risk both directly and by disrupting metabolism, while obesity itself can worsen OCP-related metabolic damage, revealing a bidirectional environment-body interaction.

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Data availability
The individual-level data supporting the findings of this study are not publicly available due to privacy and ethical restrictions protecting the confidentiality of participants from “Henan rural cohort”. As a result, the data used in this research and related data can be obtained upon reasonable request from the corresponding author. The analytical code used in this study is available from the corresponding author upon reasonable request for academic and non-commercial purposes.
Code availability
The individual-level data supporting the findings of this study are not publicly available due to privacy and ethical restrictions protecting the confidentiality of participants from “Henan rural cohort”. As a result, the data used in this research and related data can be obtained upon reasonable request from the corresponding author. The analytical code used in this study is available from the corresponding author upon reasonable request for academic and non-commercial purposes.
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Acknowledgements
The authors are grateful to everyone who took part in the study.
Funding
This research was supported by the National Key Research and Development Program of China (Grant No.: 2023YFC2506505), the National Natural Science Foundation of China (Grant No.: 42177415, 21806146), the Postdoctoral Science Foundation of China (Grant No.: 2020T130604, 2021M702934), the Science and Technique Foundation of Henan Province (Grant No. 232102411006, 232102310213, 212102310074), the Scientific and Technological Innovation of Colleges and Universities in Henan Province Talent Support Program (Grant No. 22HASTIT044), the Young Backbone Teachers Program of Colleges and Universities in Henan Province (Grant No. 2021GGJS015), and the Excellent Youth Development Foundation of Zhengzhou University (Grant No. 2021ZDGGJS057).
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Investigation, data curation, methodology, formal analysis, visualization, writing-original draft: JYS; investigation, data curation, methodology, formal analysis: DDW; investigation, writing-review & editing: CCM, JTG, and MZZ; Investigation, validation, writing-review & editing: JH; investigation, data curation, writing-review & editing: WQH, TJ, ZC, SH, and XZ; conceptualization, methodology, supervision, writing-reviewing & editing: CJW; conceptualization, methodology, investigation, validation, supervision, funding acquisition, project administration, writing-original draft: ZXM.
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Shi, J., Wei, D., Ma, C. et al. Organochlorine pesticides and obesity in a rural prediabetic population: exploring bidirectional pathways with metabolic indicators. Int J Obes (2026). https://doi.org/10.1038/s41366-026-02036-z
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DOI: https://doi.org/10.1038/s41366-026-02036-z


