Analysis of quality of iodized salt and key groups' iodine nutritional status

Objective To understand the quality of iodized salt of the residents of Pingdingshan City,and the iodine nutritional status of children from 8-10 years of age,pregnant women and lactating women,and provide basis for intervention strategies. Methods At the east,west,south,north and the middle five directions of the city,residents' salt samples were gathered to determine the amount of iodine salt. The samples of urine were collected from 40 children( 8-10 years of age), 40 pregnant women and 40 lactating women,for the assay of urinary iodine. Salt iodine was determined by direct titration, urinary iodine was measured using ammonium sulfate digestion-arsenic cerium catalytic spectrophotometry. Results The salt samples of 1500 households were tested,and the median of salt iodine was 27. 5 mg / kg,the iodized salt popularizing rate is 98. 26%,the qualification rate of iodized salt was 94. 09%,the qualified edible rate of iodized salt was 92. 46%; the median of urinary iodine of children aged 8-10 was 164. 92 μg / L. The ratio of urinary iodine 50 μg / L was 6. 69%( 17 / 254); compared with the urinary iodine 50 μg / L( 16. 41%) of children from 8-10 years of age in 2011,the difference was statistically meaningful( χ2= 15. 01,P0. 05); The median of pregnant women's urinary iodine was 151. 87 μg / L, the ratio of urinary iodine 150 μg / L to the urinary iodine 150 μg / L was 48. 59%( 121 /249); The median of lactating women's urinary iodine was 145. 32 μg / L,and the ratio of urinary iodine 100 μg / L to the urinary iodine 100 μg / L was 29. 07%( 66 /227). Conclusion The indicators of the quality of iodized salt and iodine nutrition survey of Pingdingshan City continuously maintained thenational standard of eliminating iodine deficiency. On the whole,the iodine nutritional status of children from 8-10 years of age,pregnant women and lactating womens' need of iodine was appropriate. However, special concern should be put on the iodine-need for the key groups.