A comparative study of iodine nutritional status of different populations before and after adjustment of salt iodine concentration in Fujian Province / 中华地方病学杂志

ABSTRACT

Objective To understand the effects of salt iodine content adjustment on iodine nutritional status of residents in Fujian Province.Methods In 2009 (before the adjustment) and 2014 (after the adjustment),cross-sectional research methods and stratified cluster sampling methods were adopted,17 and 19 survey sites (residential committees and villages) were selected,respectively.At each survey site,20 adults,30 pregnant women,30 lactating women and 50 children (8-10 years old) were selected in 2009;50 adults,50 pregnant women,50 lactating women and 100 children (8-10 years old) were selected in 2014.Random urine samples in one day were collected,and the urinary iodine content was measured by "the Arsenic and Cerium Catalyzed Spectrophotometric Method" (WS/T 107-2006).The results of before and after the adjustment were compared and iodine nutrition was evaluated.Results Before and after adjustment of salt iodine content,the urinary iodine median of children and adults was 208.7,202.8,163.0 and 157.6 μg/L,respectively,and after the adjustment,the iodine nutrition was at the appropriate level (100-199 μg/L).The urinary iodine median of lactating women was 128.9 and 107.4 μg/L before and after the adjustment,iodine nutrition was at an appropriate level (≥ 100 μg/L).The urinary iodine median of pregnant women was 149.2 and 124.0 μg/L before and after the adjustment,which were deficient (＜ 150 μg/L).Conclusion After down-regulating the iodized salt content,the iodine nutrition of the general residents in Fujian Province is basically at an appropriate level,and pregnant women have different levels of iodine deficiency.