[A cross-sectional study on urinary iodine and iodine content of salt among school children aged 8-10 years old in Yuhuan County, Zhejiang Province in 2012].
OBJECTIVE
To understand the level of urinary iodine and iodine content of salt among school children aged 8 to 10 years in Yuhuan County, Zhejiang Province.


METHODS
A cross-sectional study was conducted in a primary school of Yuhuan County purposely selected in 2012. Totally, 450 children aged 8 to 10 years were involved by the cluster-stratified sampling. All subjects received a free physical examination and morning urine and salt using in the household were collected. Urinary iodine and the iodine content of salt the children were tested.


RESULTS
Totally, 449 of 450 children provided the morning urine enough to be tested. The median of children's urinary iodine was 114.0 microg/L, and the proportions of them with the urinal iodine < 50 microg/L, < 100 microg/L and > or = 300 microg/L were 4.4%, 37.9% and 2.7%, respectively. Among 447 salt samples collected, the median of iodine content was 0.0 mg/kg. The coverage rate of iodized salt was 27.3%, the qualified rate of iodized salt was 92.6%, and the intake rate of qualified iodized salt was 25.3%. The median of urinary iodine of children with iodized salt was significantly higher than that of those without iodized salt (Z = 3.47, P = 0.001).


CONCLUSIONS
Current nutritional status of iodine is overall proper and safety in the population of school children aged 8-10 years old in Yuhuan County.
Yuhuan County Center of Disease Control and Prevention, Taizhou 317600, China. yhsumeifang@yeah.net
Meifang
M
Su
Yuhuan County Center of Disease Control and Prevention, Taizhou 317600, China.
Congyun
C
Wang
Yuhuan County Center of Disease Control and Prevention, Taizhou 317600, China.
Songtao
S
Li
Yuhuan County Center of Disease Control and Prevention, Taizhou 317600, China.
Xuhua
X
Ying
Yuhuan County Center of Disease Control and Prevention, Taizhou 317600, China.
Qi
Q
Zhao
Yuhuan County Center of Disease Control and Prevention, Taizhou 317600, China.
Chaowei
C
Fu
Yuhuan County Center of Disease Control and Prevention, Taizhou 317600, China.
Qingwu
Q
Jiang
D002648:Child; D002681:China; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007455:Iodine / Q000032:analysis / Q000652:urine*; D008297:Male; D012424:Rural Population; D012494:Sampling Studies; D012574:Schools; D017673:Sodium Chloride, Dietary / Q000032:analysis*; D013334:Students
D017673:Sodium Chloride, Dietary; C034024:iodized salt; D007455:Iodine