Surveillance of Iodine Deficiency Disorders in Chongqing in 2011

Objective To investigate iodine deficiency disorders(IDD)and iodine nutrition level among the residents in Chongqing for formulating preventive measures.Methods With population probability sampling method (PPS),30counties were selected for monitoring.Forty students aged 8-10were selected from each of 30primary schools.Urinary iodine,salt iodine were detected while the thyroid content was measured by B ultrasound.Five pregnant women and 5lactating women were randomly selected from 3spot townships nearby and urinary iodine of whom was tested.Results A total of 1,322students aged 8-10were investigated and the goiter rate was 5.52%.A total sample of 1,321salts were test and the salt iodine was 30.46mg/kg on average.The coverage rate,rate of qualified iodized salt,taking rate of qualified iodized salt and rate of non-qualified iodized salt was 99.70%,97.04%,96.74% and 0.30%,respectively.The median of urine iodine in children aged 8-10was 254.1μg/L.Urine iodine of 100-199.99 μg/L accounted for 23.23%and 300μg/L of urine iodine accounted for 36.52%of the total.The median of urine iodine of pregnant and lactating women was 222.5μg/L.Urine iodine of 100-199.99μg/L accounted for 30.34% and urine iodine above 300μg/L accounted for 32.20%.Conclusion Total goiter rate,salt iodine and urinary iodine have achieved the national standard for eliminating IDD.The iodine nutrition of children exceed the adequate level;iodine nutrition of pregnant and lactating women is appropriate.