The aim of this study is to monitor iodine nutrition in Switzerland in order to inform the authorities regarding iodine content in iodized salt. As a proxy for the entire population the investigators will study school aged children, pregnant women and women of reproduction age.
In a national sample of school aged children (n=990), pregnant women (n=700) and women of reproductive age (n=700) urinary iodine will be determined in order to assess iodine nutrition in Switzerland. In addition, in both groups of women a blood sample will be taken for the determination of thyroid hormones, iron- and folate status. Questionnaires will be used for the determination of dietary iodine and salt intake as well as sociodemographic parameters.
Study Type
OBSERVATIONAL
Enrollment
1,430
Human Nutrition Laboratory, ETH Zurich
Zurich, Switzerland
Median urinary iodine concentration in school aged children, pregnant women and women of reproductive age
analysis of urine samples
Time frame: Baseline
Population mean thyroglobulin
Analysis of venous blood samples. Assessed only in women
Time frame: Baseline
Population mean thyroid stimulating hormone
Analysis of venous blood samples. Assessed only in women
Time frame: Baseline
Population mean thyroxine
Analysis of venous blood samples. Assessed only in women
Time frame: Baseline
Median urinary sodium concentration
Time frame: Baseline
Median urinary creatinin concentration
Time frame: Baseline
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