1
|
Lou X, Wang X, Wang Z, Mao G, Zhu W, Wang Y, Pan X, Chen Z, Mo Z. The Effect of Iodine Status on the Risk of Thyroid Nodules: A Cross-Sectional Study in Zhejiang, China. Int J Endocrinol 2020; 2020:3760375. [PMID: 32908502 PMCID: PMC7450337 DOI: 10.1155/2020/3760375] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/09/2020] [Accepted: 08/05/2020] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE The aim of this study was to explore whether iodine nutrition is associated with the risk of thyroid nodules among adult population in Zhejiang Province, China. METHODS A cross-sectional study was conducted in the general population aged 18 years or older. A total of 2,710 subjects received physical examination, questionnaires, and thyroid ultrasonography. Urinary iodine concentration (UIC) and thyroid hormone levels were measured and documented for each subject. 4 multiple logistic regression models adjusted for other risk factors were applied to analyze the association between iodine nutrition and thyroid nodules. RESULTS The prevalence of thyroid nodules was 15.5% among all adults. As indicated by all 4 models, subjects with UIC varying from 200 μg l-1 to 399 μg l-1 had lower risk of thyroid nodules compared with those with relatively low UIC (<100 μg l-1), with approximately 37-57 percent reduction in risk. Moreover, subjects with UIC between 100 and 199 μg l-1 had a decreased risk of thyroid nodules in model 1 and 2 (OR = 0.75, 95% CI, 0.58-0.97; OR = 0.75, 95% CI, 0.58-0.97, respectively). However, there was no significant difference of risk in thyroid nodules between subjects with high UIC (≥400 μg l-1) and low UIC (<100 μg l-1). Furthermore, intake of iodized salt was inversely associated with risk of thyroid nodules, with approximately 69-77 percent reduction in risk. CONCLUSION The relationship between UIC and the risk of thyroid nodules is U-shaped. Consumption of noniodized salt is an independent risk factor of thyroid nodules.
Collapse
Affiliation(s)
- Xiaoming Lou
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Xiaofeng Wang
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Zhifang Wang
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Guangming Mao
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Wenming Zhu
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Yuanyang Wang
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Xuejiao Pan
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Zhijian Chen
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| | - Zhe Mo
- Department of Environmental Health, Zhejiang Provincial Center for Disease Prevention and Control, 3399 Binsheng Road, Hangzhou 310051, Zhejiang, China
| |
Collapse
|