Abstract
Background
Selenium has been shown to influence the pathological processes and physiological functions of thyroid. Although growing evidence has shown that selenium can improve the treatment of Hashimoto’s thyroiditis (HT), there is a need to evaluate the association between dietary selenium intake and HT in a large cross-sectional study. This study explored the association between dietary selenium intake and HT based on the National Health reand Nutrition Examination Survey (NHANES) database (2007–2012).
Methods
A total of 8756 of 30,442 participants were included in the study. Dietary selenium intake was the independent variable, while HT was the dependent variable. In addition, the relative importance of the selected variables was determined using the XGBoost model. A smooth curve was constructed based on the fully adjusted model to investigate the potential linear relationship between dietary selenium intake and HT. Smooth curves were also constructed to explore the linear/non-linear relationship between dietary selenium intake and thyroid peroxidase antibody (TPOAb)/ thyroglobulin antibody (TgAb).
Results
The mean age of the enrolled participants was 44.35 years (± 20.92). The risk of HT was significantly reduced by a 35% per-unit increase in dietary selenium intake after fully adjusting for covariates according to the model (log2-transformed data; OR 0.65; 95% CI 0.51, 0.83). The XGBoost model revealed that dietary selenium intake was the most important variable associated with Hashimoto’s thyroiditis. Dietary selenium intake (Log2-transformed) was negatively correlated with TPOAb levels [− 16.42 (− 22.18, − 10.65), P < 0.0001], while a non-linear relationship was observed between dietary selenium intake and TgAb with an inflection point of 6.58 (95.67 μg, Log2-transformed).
Conclusion
Dietary selenium intake is independently and inversely associated with HT risk. Moreover, dietary selenium intake is negatively correlated with TPOAb levels and non-linearly correlated with TGAb levels. Therefore, dietary selenium intake may be a safe and low-cost alternative for the prevention and treatment of HT.
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Data availability statement
The datasets in this article are available in the public repository database. The authors do not own the data. National Health and Nutrition Examination Survey data are available from the National Center for Health Statistics (https://www.cdc.gov/nchs/nhanes/).
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Acknowledgements
Thank you so much for one tree’s R package support.
Funding
This study was funded by the National Natural Science Foundation of China, grant number 82103199 and the Medical and Health Research Program of Zhejiang Province, grant number 2021435899 and Zhejiang Province Postdoctoral Research Excellence Funding Project, grant number ZJ2021167 and Zhejiang Provincial Natural Science Foundation, grant number LY19H180004 and Medical and Health Research Program of Zhejiang Province, grant number 2023KY420 and The incubation project of the First Affiliated Hospital of Wenzhou Medical University, grant number FHY2019068 and Zhejiang Provincial Natural Science Foundation, grant number LY23H160024 and Lishui Municipal Science and Technology Program, grant number 2023GYX05.
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Conceptualization and design, LZ and GZ; Data, YG, YC, and SH; Formal analysis, LZ, LL and GZ; Writing—original draft, LZ, YC, and YG; Writing—review and editing and critical analysis of the results, LZ, YC, YG, FS, YH, LL and GZ. All authors have read and agreed to the published version of the manuscript.
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This study was conducted following Declaration of Helsinki (revised 2013). National Health and Nutrition Examination Survey protocol was approved by the Ethics Review Committee of the National Center for Health Statistics (NCHS).
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Zheng, G., Cai, Y., Guo, Y. et al. The association between dietary selenium intake and Hashimoto’s thyroiditis among US adults: National Health and Nutrition Examination Survey (NHANES), 2007–2012. J Endocrinol Invest 46, 1385–1395 (2023). https://doi.org/10.1007/s40618-022-01987-0
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DOI: https://doi.org/10.1007/s40618-022-01987-0