Relationship between Dining Place, Iodine Source, and Iodine Nutrition in School-Age Children: A Cross-Sectional Study in China.

Ting Ting QIAN; Rong SUN; Lan Chun LIU; Wen Jing CHE; Meng ZHAO; Ling ZHANG; Wei Dong LI; Qing Zhen JIA; Jian Hui WANG; Jin Shu LI; Zhi Hui CHEN; Bi Yun ZHANG; Peng LIU

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Relationship between Dining Place, Iodine Source, and Iodine Nutrition in School-Age Children: A Cross-Sectional Study in China.

Author: Ting Ting QIAN ¹ ; Rong SUN ¹ ; Lan Chun LIU ¹ ; Wen Jing CHE ¹ ; Meng ZHAO ¹ ; Ling ZHANG ² ; Wei Dong LI ³ ; Qing Zhen JIA ⁴ ; Jian Hui WANG ⁵ ; Jin Shu LI ⁶ ; Zhi Hui CHEN ⁷ ; Bi Yun ZHANG ⁸ ; Peng LIU ^{9
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Author Information

1. Endemic Disease Control Center, Chinese Center for Disease Control and Prevention. Harbin Medical University, Harbin 150081, Heilongjiang, China.
2. Center for Disease Control and Prevention in Xinjiang Uygur Autonomous Region, Urumqi 830002, Xinjiang, China.
3. Center for Disease Control and Prevention in Anhui Province, Hefei 230601, Anhui, China.
4. Institute of Endemic Disease Prevention and Control in Shanxi province, Linfen 041000, Shanxi, China.
5. Center for Disease Control and Prevention in Liaoning Province, Shenyang 110000, Liaoning, China.
6. Center for Disease Control and Prevention in Sichuan Province, Chengdu 610041, Sichuan, China.
7. Center for disease control and prevention in Fujian province, Fuzhou 350012, Fujian, China.
8. Center for Disease Control and Prevention in Hubei Province, Wuhan 430079, Hubei, China.
9. Endemic Disease Control Center, Chinese Center for Disease Control and Prevention. Harbin Medical University, Harbin 150081, Heilongjiang, China
10. Key lab of Etiology and Epidemiology, Education Bureau of Heilongjiang Province & Ministry of Health, Microelement and human health lab of Heilongjiang Province, Center for Endemic Disease Control, Chinese Center for Disease Control and Prevention, Harbin Medical University, Harbin 150081, Heilongjiang, China.
Publication Type:Journal Article
Keywords: Dining place; Iodine-rich processed foods; Source of iodine; Urinary iodine
MeSH: Humans; Child; Nutritional Status; Cross-Sectional Studies; Iodine; Sodium Chloride, Dietary/analysis*; China; Water
From: Biomedical and Environmental Sciences 2023;36(1):10-23
CountryChina
Language:English
Abstract: OBJECTIVE:This study assesses the impact of iodine-rich processed foods and dining places on the iodine nutritional status of children.
METHODS:School-aged children (SAC) in seven provinces in China were selected by school-based multi-stage sampling. Urinary iodine, salt iodine, and thyroid volume (TVOL) were determined. Questionnaires were used to investigate dining places and iodine-rich processed foods. The water iodine was from the 2017 national survey. Multi-factor regression analysis was used to find correlations between variables.
RESULTS:Children ate 78.7% of their meals at home, 15.1% at school canteens, and 6.1% at other places. The percentage of daily iodine intake from water, iodized salt, iodine-rich processed foods, and cooked food were 1.0%, 79.2%, 1.5%, and 18.4%, respectively. The salt iodine was correlated with the urinary iodine and TVOL, respectively (r = 0.999 and -0.997, P < 0.05). The iodine intake in processed foods was weakly correlated with the TVOL (r = 0.080, P < 0.01). Non-iodized salt used in processed foods or diets when eating out had less effect on children's iodine nutrition status.
CONCLUSION:Iodized salt remains the primary source of daily iodine intake of SAC, and processed food has less effect on iodine nutrition. Therefore, for children, iodized salt should be a compulsory supplement in their routine diet.