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Updated: May 3, 2026

Estimation of Urinary Nanocrystals in Humans using Calcium Fluorophore Labeling and Nanoparticle Tracking Analysis
Published on: February 9, 2021
[Factors related to urinary iodine in adults from Shanghai]
1Shanghai MOE-Key Laboratory of Children's Environmental Health, School of Medicine Affiliated Xinhua Hospital, Shanghai Jiaotong University, Shanghai 200092, China.
Objective:
The objective of this study was to analyze the related factors that influencing the level of urinary iodine(UI).
Methods:
994 adult cases were selected from medical centers. Morning urine was collected and questionnaire including age, sex, family medical history of thyroid disease administered. Information on previous 24-hour consumption of iodine-containing foods was collected. Data was analyzed by Empower(®) software with logistic model.
Results:
The median UI level was 193.0 µg/L. After adjusting for potential confounders, gender (P = 0.000), family monthly income per capita (P = 0.000), the amount of iodized salt intake (P = 0.041), and eating kelps (P = 0.000)appeared to be associated with the level of UI. Risk regarding the prevalence of excess UI (>300 µg/L)increased with the increasing amount of salt and kelp consumption:salt consumption > 165 g/m (OR = 24.3, 95%CI:1.1-523.8, P < 0.05); kelp consumption (OR = 9.6, 95%CI:2.6 -35.1, P < 0.001).
Conclusion:
UI was associated with factors as:gender, family monthly income per capita, intake of iodized salt and the amount of kelp consumption. Excessive intake of iodine might be associated with high intake of iodized salt and kelp.
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