河北省非高碘地区儿童和孕妇碘营养水平分析

目的:掌握河北省非高碘地区8 ~ 10岁儿童和孕妇碘营养水平，为碘缺乏病防治研究工作提供科学依据和针对性的防治策略。方法:2018年对河北省162个县（市、区，以下简称县）进行碘营养分析，每个监测县按东、西、南、北、中划分5个抽样片区，每个片区抽取1个乡镇/街道，每个乡镇/街道抽取1所小学，每所小学抽取8 ~ 10岁非...

Analysis of iodine nutritional level of children and pregnant women in non-iodine excess areas in Hebei Province

Objective To master the iodine nutritional level of children aged 8-10 and pregnant women in non-iodine excess areas in Hebei Province,and provide scientific basis and targeted prevention and treatment strategies for prevention and treatment of iodine deficiency disorders.Methods Iodine nutrition analysis was conducted in 162 counties(cities and districts,hereinafter referred to as counties)of Hebei Province in 2018.Each monitoring county was divided into 5 sampling areas according to east,west,south,north and middle locations.One township/street was randomly selected in each area,1 primary school was selected in each township/street,and 40 non-boarding students aged 8-10 were selected from each primary school.In each monitoring county,20 pregnant women were selected from each of the 5 townships/streets.Both children and pregnant women were collected samples for salt and urinary iodine(with a random urine sample)detection.The iodine content of salt was tested using the"General Test Method for Salt Industry-Determination of Iodine"(GB/T 13025.7-2012),and Sichuan salt and other fortified edible salt used the arbitration method.The urinary iodine content was tested using the"Arsenic-Cerium Catalytic Spectrophotometric Determination of Iodine in Urine"(WS/T 107-2006).Results A total of 31883 samples of edible salt were collected from children's homes in 162 counties,among which 28539 were iodized salt,26456 were qualified iodized salt,the iodized salt coverage rate was 88.36%(after population standardization),and the qualified iodized salt consumption rate was 81.03%(after population standardization).A total of 31883 urine samples were collected from children,with the median urinary iodine of 193.13μg/L.There was one county with a median urinary iodine<100μg/L,and the median urinary iodine in 150 counties was 100-299μg/L.A total of 15572 salt samples of pregnant women were collected,among which the iodized salt samples were 14260,the qualified iodized salt samples were 13363,the iodized salt coverage rate was 90.10%(after population standardization),and the qualified iodized salt consumption rate was 83.54%(after population standardization).A total of 15569 pregnant women were collected urine samples,the median urinary iodine was 164.86μg/L,and the number of counties with a median urinary iodine<150μg/L was 67.Conclusions Iodine nutrition of children and pregnant women is appropriate at the provincial level,but children and pregnant women in some counties are at risk of iodine deficiency.In the future,the prevention and treatment of iodine deficiency disorders should focus on the iodine nutrition monitoring of the special needs.