Published online by Cambridge University Press: 02 January 2007
This study aimed to clarify the iodine deficiency status in the Semipalatinsk region that has been contaminated by radioactive fallout from nuclear testing during the period of the former USSR.
Based on the Japan–Kazakstan joint project of adult cancer screening around the Semipalatinsk Nuclear Testing Site (SNTS), from May to October 2002 spot urine specimens were collected at random in each village. Separately, children aged 5–15 years from around the SNTS were chosen at random and spot urine specimens were collected from them.
Area contaminated by radioactive fallout around the SNTS, Republic of Kazakstan.
A total of 2609 adults aged >40 years from 16 settlements in three regions and one city, and 298 children aged 5–15 years from two regions and one city.
Median urinary iodine concentrations of adults and children in all regions were in the range of 116.0–381.7 and 127.7–183.0 μg l−1, respectively. The highest prevalence of values <50 μg l−1 (14.1%) did not exceed 20%. Distributions within each group, adults and children, showed almost the same pattern, except for one region where more than 50% of adults had urinary iodine concentration >100 μg l−1.
In agreement with our previous studies, the urinary iodine concentration data showed no clear evidence of iodine deficiency around the SNTS. Kazakstan is geographically and nutritionally at moderate risk of iodine deficiency disorders without fortification or iodine replacement by iodised salt. The socio-medical prophylaxis against iodine deficiency has been successfully maintained in East Kazakstan.
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