An analysis of surveillance data of iodine deficiency disorders in Shandong Province in 2016 / 中华地方病学杂志

ABSTRACT

Objective To understand the iodine nutritional status of population in iodine deficiency areas in Shandong Province and to provide basis for adjustment of control strategy in Shandong Province.Methods Forty county-level monitoring sites were selected in 2016.Each county was divided into five areas including east,west,south,north and middle areas according to the location.A township (street) was randomly selected in each area and a primary school was selected from each township (street).Forty students aged 8-10 (half males and half females) were selected in each school for thyroid B hyperthyroidism examination and determination of urinary iodine and salt iodine.At the same time,20 pregnant women were selected from each township (street) for determination of urinary iodine and salt iodine.Iodine nutrition criterionchildren's urinary iodine median ＜ 100 μg/L is insufficient,100 ～ 199 μg/L is appropriate,200 ～ 299 μg/L is more appropriate,≥300 μg/L is an excessive intake;the urinary iodine median of pregnant women ＜ 150 μg/L is insufficient,150 ～ 249 μg/L is appropriate,250 ～ 499 is more appropriate,≥500 μg/L is an excessive intake.Results A total of 8 045 urine samples of children were tested and the median of urinary iodine of children was 183.5 μg/L.A total of 8 045 children were examined thyroid and the rate of goiter was 3.0％ (239/8 045).A total of 4 097 urine samples of pregnant women were tested and the median of urinary iodine of pregnant women was 153.5 μg/L.A total of 12 027 edible salt samples were tested and the mean of salt iodine concentration was 23.6 mg/kg.The coverage rate of iodized salt was 95.0％ (11 422/12 027),the qualified rate of iodized salt was 91.1％ (10 407/11 422) and the consumption rate of qualified iodized salt was 86.5％ (10 407/12 027).Conclusion Both children and pregnant women in 40 iodine-deficient counties of Shandong Province are in a suitable state of iodine nutrition and the salt iodine contents of the residents comply with the standards of Shandong Province.