ABSTRACT
Objective To learn the iodine nutritional status of the vulnerable population with different iodine level under the current level of iodized salt in Shandong province and to offer prevention and cure measures.Methods Five groups of vulnerable population including school children aged 8 - 10, pregnant, lactation women, infants and women of childbearing age from mountain areas ( Daiyue, Mengyin counties ) , plain ( Luxian,Gaomi counties ) and coastal (Zhaoyuan county ) of five different iodine deficient areas were investigated in 2007.The thyroids of children aged 8 - 10 were checked by palpation and B ultrasound, their edible salt iodine level was detected by direct titration. The lever of urinary iodine of vulnerable population was examined by arsenic and cerium speetrophotometry. Results The goiter rates of 8 - 10 year-old were 1.8%(9/514) and 1.2%(6/514), respectively by palpation and B-ultrasonic. The mean iodine of 501 edible salt samples was 30.95 mg/kg. The coverage rate of iodized salt was 94.6% (474/501). The rate of qualified iodized salt was 90.4% (453/501). The median of urinary iodine was 216.7 μg,/L. The urinary iodine of school children aged 8 - 10, pregnant, lactation women, infants and women of childbearing age were 234.0, 165.5, 162.4, 257.5, 233.0 μg/L, respectively. Conclusions Current iodine nutritional level is basically appropriate in all groups of vulnerable people. The current iodine content of iodized salt could meet the needs of population from different iodine deficient areas of Shandong province.
ABSTRACT
Objective To look into the current distribution of iodine deficiency area in Shandong province and to guide the re-defined iodine deficiency area and to supplement iodine scientifically. Methods In 2008, 100 iodine deficiency counties(cities, districts), designated in Shandong province's "to supplement iodized salt to eliminate the hazard of iodine deficiency management regulations", were selected in the study. One to three samples were collected from water source which was used by the majority of local residents in the 100 iodine deficiency places and iodine concentration was tested by As3+-Ce4+ catalyzing spectrophotometry. Results A total of 65 716 water samples were collected. Sample recovery efficiency reached 99.8%(65 572/65 716). The median water iodine was 5.57 μg/L, with 82.05%( 1097/1337 ) of the township(town) met criteria for the classification of iodine deficiency areas(water iodine ＜ 10 μg/L), 17.43%(233/1337) of the township (town) water iodine moderate(water iodine 10 - 150 μg/L), and 0.52%(7/1337)of the township(town) should be defined high iodine areas(water iodine ＞ 150 - 300 μg/L). Conclusions The iodine deficiency areas should be redefined because water iodine concentrations of iodine deficiency areas have changed. We suggest that the smallest place to supply salt with different range of iodine content is set to the township(town).
ABSTRACT
Objective To find out prevelence of thyroid goiter on school-aged children in excessive iodine region of Shandong Province.Methods By employing B-ultrasonography and palpation method,the thyroid volume were investigated and the thyroid goiter rate were calculated among 6415 children aged 8～10 years old in execssire iodine region.Results By employing B-ultrasonography method.The volumes of thyroid in goiter children aged 8,9,10 years were(5.67±1.49),(6.07±1.24),(7.30±2.01)ml,respectively.The goiter rates were 28.84%(683/2368),20.89%(448/2144),11.82%(225/1903).The volumes of thyroid in non-goiter children aged 8,9,10 years were(3.36±0.67),(3.64±0.77),(4.02±0.94)ml.When the normal value of thyroid volume in 8 and 9 year-groups lowered 0.5 ml,the goiter rate would be changed to 18.20%(430/2368)and 12.92%(277/2144) respectively.The thyroid volumes of boys and girls were(4.20±1.38),(4.18±1.73)ml,respectively.The goiter rates of boys and girls were 21.92%(732/3340)and 20.29%(624/3075)respectively.The rates of goiter detected by palpation in 8,9 and 10 year-groups were 10.05%(238/2368),10.31%(221/2144)and 14.45%(275/1903) respectively.Conclusions Along with the increasing age,the volume of thyroid in children aged 8～10 is increasing in excessive iodine region of Shandong Province.But the goiter rate is decreasing ahmg the increasing age.This phenomena may be caused by improper normal value of thyroid volume.Therefore,the normal value of thyroid volume should be revised urgently.