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Stine Linding Andersen, Louise Kolding Sørensen, Anne Krejbjerg, Margrethe Møller, and Peter Laurberg

Introduction Population median urinary iodine concentration (UIC) is the recommended method to assess iodine status [ 1 ]. UIC in pregnancy is extensively studied and adequate maternal iodine intake is of major concern [ 2 , 3 , 4

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Rosália P. Padovani, Rui M.B. Maciel, Teresa S. Kasamatsu, Beatriz C.G. Freitas, Marilia M.S. Marone, Cleber P. Camacho, and Rosa Paula M. Biscolla

of urinary iodine (UI), which is a valid index for iodine intake, since 90% of iodine excretion from the body occurs through urine and only a small amount is lost through the skin and intestines [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Usually

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Yi Pan, Kathleen L. Caldwell, Yan Li, Samuel P. Caudill, Mary E. Mortensen, Amir Makhmudov, and Robert L. Jones

cognitive and physical impairment and growth failure as a result of prolonged dietary iodine-induced hypothyroidism during pregnancy and lactation, and consequently distressing birth outcomes. Median (50th percentile) urinary iodine (UI) concentration is

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Stine Linding Andersen and Peter Laurberg

Iodine Deficiency Disorders [ICCIDD, currently the Iodine Global Network (IGN)] [ 5 ]. According to this guideline, a median urinary iodine concentration (UIC) in the range of 100-199 µg/l in a population of school-aged children and nonpregnant adults

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Sun Mi Park, Yoon Young Cho, Ji Young Joung, Seo Young Sohn, Sun Wook Kim, and Jae Hoon Chung

warranted for appropriate management after ATD discontinuation in patients with Graves' disease. Measurement of urinary iodine concentration (UIC) in 24-hour urine samples is considered the best method to evaluate the status of iodine intake [ 10 , 11

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Till Ittermann, Adrian Richter, Martin Junge, Matthias Nauck, Astrid Petersmann, Clemens Jürgens, Harald Below, Carsten Oliver Schmidt, and Henry Völzke

variations. For example, individual urinary iodine excretion levels vary strongly from day to day and during the day because they mainly depend on previous food intake [ 2 ]. Diurnal and seasonal variations have also been reported for thyroid hormone levels

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Eftychia G. Koukkou, Ioannis Ilias, Irene Mamalis, and Kostas B. Markou

Introduction Adequate dietary iodine consumption, as determined by the urinary iodine concentration (UIC), is necessary for a normal thyroid function. During pregnancy, iodine requirements are increased [ 1 ] as a result of both the normal

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Eftychia Koukkou, Ioannis Ilias, Irene Mamalis, Georgios G. Adonakis, and Kostas B. Markou

, according to the WHO recommendations, assessed using urinary iodine concentration (UIC) [ 8 ]. This can be measured either over 24 h or as a morning spot collection, and can be expressed either per gram creatinine or micrograms per liter. However, because

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Marta Taida García-Ascaso, Susana Ares Segura, Purificación Ros Pérez, Roi Piñeiro Pérez, and Marta Alfageme Zubillaga

total, about 20% of the world’s population is at risk [ 3 ]. To determine the nutritional status of iodine in a population, the WHO and the Iodine Global Network indicate the urinary iodine concentration (UIC, expressed in μg/L) to provide the most

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Catarina Senra Moniz, Rita Carvalho, Susana Prazeres, Edward Limbert, Inês Mendes, and Rui César

, 4 ]. Dietary iodine is almost completely excreted through urine, so urinary iodine concentration (UIC) levels are excellent indicators of recent iodine intake [ 5 ]. According to the criteria of the WHO based upon epidemiological evidence, a daily