Abstract
We aim to examine the association between chemical mixtures and obesity. Blood and urinary levels of tween-six chemicals were measured in adults who participated in the KoNEHS. We identified the associations of chemicals with obesity using linear regression models. Weighted quantile sum (WQS) regression, quantile g-computation (qgcomp), and Bayesian kernel machine regression (BKMR) were conducted as secondary analyses. Of the 3,692 participants included in the analysis, 18.0% had obesity. In the logistic regression model, mercury (Hg), lead (Pb), and 3PBA levels were associated with obesity, and significant trends were observed for these chemical tertiles (p < 0.001). Hg, Pb, and 3PBA levels were also associated with BMI. The WQS index was significantly associated with both obesity (OR = 2.15, 95% CI: 2.11–2.20) and BMI (β = 0.39, 95% CI: 0.37–0.51). The qgcomp index also found a significant association between chemicals and both obesity (OR = 1.70, 95% CI: 1.56–1.85) and BMI (β = 0.40, 95% CI: 0.39–0.41). Hg, Pb, and 3PBA were the most heavily weighed chemicals in these models. In BKMR analysis, the overall effect of the mixture was significantly associated with obesity. Hg, Pb, and 3PBA showed positive trends and were observed as the most important factors associated with obesity. Given increasing exposure to chemicals, there is a need to investigate the associations between chemical exposures, either separately or together, and incident obesity risk factors in well-characterized cohorts of different populations, and to identify potential approaches to chemical exposure prevention.
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Data availability
The data used to support the findings of this study are available from the corresponding author upon request.
Change history
26 November 2021
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Abbreviations
- BPb:
-
Blood lead
- BHg:
-
Blood mercury
- UHg:
-
Urine mercury
- UCd:
-
Urine cadmium
- ttMA:
-
T,t-Muconic acid
- BMA:
-
Benzylmercapturic acid
- 1OHP:
-
1-Hydroxypyrene
- 2NAP:
-
2-Naphthol
- 2OHFlu:
-
2-Hydroxyfluorene
- 1OHPhe:
-
1-Hydroxyphenanthrene
- MEHHP:
-
Mono-(2-ethyl-5-hydroxyhexyl) phthalate
- MEOHP:
-
Mono-(2-ethyl-5-oxohexyl) phthalate
- MnBP:
-
Mono-n-butyl phthalate
- MBzP:
-
Mono-benzyl phthalate
- MECPP:
-
Mono-(2-ethyl-5-carboxypentyl) phthalate
- MCOP:
-
Mono-carboxyoctyl phthalate
- MCNP:
-
Mono-carboxy-isononly phthalate
- MCPP:
-
Mono (3-carboxypropyl) phthalate
- BPA:
-
Bisphenol A
- BPF:
-
Bisphenol F
- BPS:
-
Bisphenol S
- TCS:
-
Triclosan
- MeP:
-
Methylparaben
- EtP:
-
Ethylparaben
- PrP:
-
Propylparaben
- 3PBA:
-
3-Phenoxybenzoic acid
- COT:
-
Cotinine
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Acknowledgements
The authors are grateful to all research staff that contributed to the data collection required for this study.
Funding
This work was supported by National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (grant nos. NRF2013R1A1A3008851 and 2018R1D1A1B07049610).
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Hai Duc Nguyen: conceptualization; methodology; formal analysis; investigation; resources; data curation; writing, original draft; writing, review and editing; visualization. Min-Sun Kim: conceptualization; resources; data curation; writing, review and editing; visualization; supervision; project administration. Hojin Oh: validation, visualization. Ngoc Hong Minh Hoang and Won Hee Jo: investigation, visualization.
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All participants in KoNEHS provided written informed consent. The KoNEHS dataset has been de-identified and made publicly available. This survey was approved by the institutional review board of the NIER in Korea (NIER-2016-BR-003–01, NIER-2016-BR-003–03).
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Nguyen, H.D., Oh, H., Jo, W.H. et al. Mixtures modeling identifies heavy metals and pyrethroid insecticide metabolites associated with obesity. Environ Sci Pollut Res 29, 20379–20397 (2022). https://doi.org/10.1007/s11356-021-16936-2
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DOI: https://doi.org/10.1007/s11356-021-16936-2