Analysis on monitoring results of iodized salt and the iodine nutrition status in different groups of population in Xinjiang Production and Construction Corps, 2011

Objective To assess the level of iodized salt and investigate iodine nutrition status in different groups of population(student aged 8~10, pregnant women and lactating women) before the adjustment of salt iodine content in Xinjiang Production and Construction Corps, in order to provide the basis for the further assessment about the adjustment effect. Methods Thirty sampling units were selected by the probability proportionate to size method. One school was selected with cluster random sampling in each sampling unit, 40 children aged 8~10 years were randomly sampled in each school. Checked their home edible salt iodine content;12 children(girls and boys half and half) were chosen from 40 children, acquired and tested their urine iodine content; 30 cases of pregnant and lactating women were also selected to assay urine iodine content. Salt iodine was measured by direct titration; urinary iodine was measured using arsenic cerium catalytic spectrophotometry. Results The samples of edible salts were total monitored: 1195; qualified: 1 148; failed: 17; non- iodized salt: 30; The mean was(30.91±6.99) mg /kg; 97.49% coverage rate, 98.54%qualified rate and 96.07% consumption rate of qualified iodized salt all met the national standards. The median of urinary iodine of the 407 children aged 8-10 was 235.31μg/L, the median of urinary iodine of the 386 pregnant women was 182.99μg/L, The median of urinary iodine of the 432 lactating women was 173.81μg/L. Both reached the standard by WHO. Conclusion In the current level of iodized salt, the level of urinary iodine of children is appropriate. The level of iodized salt and related indices of urinary iodine among students aged 8-10, pregnant women and lactating women have already reached the national standard for eliminating iodine deficiency disorders.