Journal
JOURNAL OF ENDOCRINOLOGICAL INVESTIGATION
Volume 27, Issue 8, Pages 709-713Publisher
SPRINGER
DOI: 10.1007/BF03347510
Keywords
urinary iodine concentration; milk; thyroid; goiter; iodine deficiency disorders; nutrition
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The aim of the present study is to evaluate the relationships between urinary iodine concentration (UIC) and the intake of milk and other foods, in a group of school children of the Veneto region, in North East Italy. A questionnaire, concerning the daily intake of milk, yoghurt, cheese and other animal foodstuffs, was distributed to 233 schoolchildren aged between 11 and 15 yr. The use of iodized salt was also investigated. UIC was measured in a casual urine sample of all children investigated. The iodine content of 28 samples of milk and of 13 samples of yoghurt, bought during the summer in shops of the same area, was measured. UIC values ranged between 25 and 436 mug/l, median value was 140 mug/l, mean value 149 +/- 78 mug/l. The median iodine content of milk and yoghurt were 278 mug/l and 216 mug/l, respectively. With regard to dietary habits, about 70% of the children took 200 ml of milk or more per day, which corresponds to a daily intake of iodine ranging between 50 and 100 mug a day. About 30% of schoolchildren used iodized salt. A highly significant correlation between UIC and milk intake was observed (p = 0.0005), while the relationship was poor or absent in the case of both intake of other foodstuffs and use of iodized salt (p = 0.38). In conclusion, the results of the study document the very important role of cows' milk as a source of iodine in childhood in the Veneto region, Italy. (C) 2004, Editrice Kurtis.
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