Analysis of current status of iodine nutrition in pregnant women in Inner Mongolia in 2018

Abstract

Objective To understand the current iodine nutritional status of pregnant women in Inner Mongolia, and provide scientific basis for iodine supplementation during pregnancy. Methods In 103 banners (counties, cities and districts) of Inner Mongolia Autonomous Region, 5 townships were randomly selected according to their sub-area positions of east, west, south, north and center in each banner (county, city and district) in 2018. Twenty pregnant women in each township were sampled to collect edible salt and a random urine samples. The iodine in salt was determined by direct titration. Urinary iodine was detected by As3+-Ce4+ catalytic spectrophotometry. According to different pregnancy, maternal age and regional type, the iodine nutrition level of pregnant women was analyzed. Results Totally 9 809 pregnant women were investigated, the median of salt iodine was 23.4 mg/kg, iodized salt coverage rate was 98.03% (9 616/9 809), qualified iodized salt consumption rate was 93.32% (9 154/9 809), and the median of urinary iodine was 167.20 μg/L. Between different pregnancy and different age groups, there were no significant differences in qualified iodized salt consumption rate(P > 0.05). But the difference between different regions was statistically significant(P 0.05). In both different pregnancy and different regions, there were statistically significant differences between groups (P < 0.05). Conclusions The current iodine nutrition level of pregnant women in Inner Mongolia is suitable to meet the physiological needs of themselves, and the fetus. But pregnant women in different regions have different levels of iodine nutrition. Key words: Pregnant women; Iodine; Nutrition; Salts; Urine