The most recent data collected in 2008-2009 showed that median UIE levels of children aged one year and 2-5 years old were 190 and 178 g/L, respectively and thedistribution appeared to be skewed towards high UIE values (Table 1).13The prevalence of UIE <100 µg/L among girls aged 1-5 years was 24.5-31%, slightly higher than that for boys (i.e.,~22%). The prevalence of UIE >200 µg/L was 30-40% for both boys and girls. A shift in distribution of UIE was observed wherein the prevalence of UIE <100 µg/L increased with age, while the prevalence of UIE >200 µg/L decreased with age. It is possible that young children who attended day care centers and primary schools received lunch and milk programs which used or contained iodized salt. Furthermore, iodization of drinking water in these schools in some areas may have provided higher amounts of iodine to young children.
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