The Effect Of Different Iodine Intakes In High Iodine Area On Intellengence And Psychomotor Among Children

Objective The iodine is the important raw material to compose the thyroid hormone, there are complex relations to the bodily health from low iodine to suitable iodine and excessive iodine, Some experts proved, The iodine (water iodine, urine iodine) and the rate of thyroid goiter is popular the U shape curve relations, Namely the rate of thyroid goiter appears U shape situation from high to low, from low to high along with the iodine increases progressively. but lack of iodine or excessive iodine are all harmful to the body. The massive research confirmed the iodine lacks can create the intelligence damage as main harm thyroid gland disease, Since the beginning of the 80's our country reported that there has the excessive iodine goiter popular area, The related excessive iodine harm research had the massive reports, include excessive iodine to the student intelligence and psychomotor, But the conclusion still was inconsistent, Even is mutually contradictory. This research is for the purpose of understanding the different iodine takes area child intelligence quotient level and with it con-elation psychomotor function, discusses excessive iodine to the child intelligence growth influence.Method According to the water iodine results of Henan province, select Yucheng County was study place. Yucheng County is located in east of Henan province. In the Huanghe Valley, it's under the jurisdiction of Shangqiu. it's defined the high iodine area in 2003.select the same county Anyang was contrast. Divides into 3 groups according to the water iodine: Water iodine median 500ug/L—is excessive iodine 2 groups: the water iodine medians are 536.9ug/L, The child urines iodine median is 769.3ug/L in the Yucheng County's Limin and so on 2 townships, Each township all has the elementary school. Carries on the intelligence examination to each group of institutes in the school 7~14 year old students. The intelligence examination uses "Chinese Union Reven intelligence examination atlas" which edited by Tianjin medical college Wang Dong, Each time the intelligence examination completes by identical host trying in 40min,The intelligence determination uses CRT-C2 Chang Mo. And select more than chooses 30 students whose intelligence is below 70 to carries on the psychomotor test, The psychomotor test uses the Jinyi Psychomotor test Battery(JPB).JPB including choice reaction time> digit erase^ sign register Benton visual retention Digit SymboK connect number and bar inversion, and so on 7 targets, averages each student will cost about 20 minutes to completes 7 tests. Moreover, chooses 30 intelligences normally to take the comparison.Results there are altogether 3059 7~14year old students to carry on the intelligence examination, Male student is 1,597, Female student is 1,462. The result is the student intelligence quotient does not have the obvious difference in the sex, but has statistics significance in the high age group: The high age group student intelligence quotient is lower than the low age group; The different iodine level student intelligence has the difference: the student intelligence quotient in the excessive iodine group is obviously higher than the contrast, Moreover has statistics significance. F=37.127,P < 0.05;In 3,059 students, the low Intelligence is 215,Occupies the crowd 7.0%. The different iodine takes in the group the rate of low intelligence is different: there is 125 intelligence low in contrast group, The intelligence low formation rate is 7.8%; altogether 90 intelligence low in high iodine group, The intelligence low formation rate is 6.1%. the intelligence low formation rate obviously is lower in excessive iodinegroup than in contrast group, Statistics analysis, x2 =104.199,P < 0.05,Has statistics significance; there are 500 students carried on psychomotor test, The result showed, The different water iodine level student psychomotor test has the difference, P < 0.05,Indicated the student psychomotor in excessive iodine group is higher than in contrast group; Through to intelligence quotient and psychomotor test result spearman correlation analysis, R=0.332, PO.05, Indicated IQ and the psychomotor presents the correlation; Different intelligence quotient level student psychomotor has the significance difference, psychomotor test whose intelligence is low are obviously is more excessive than the intelligence quotient normally, x2 =19.751,P < 0.05,has statistics significance. Conclusion No obvious effect of excessive iodine is found on mental development of schoolchildren. The different water iodine level student psychomotor test has the significance difference .The psychomotor and the intelligence level are related, The JPB psychomotor test is the good test to find the child energetic movement fine distinction, Both of them may use in screen or forecast the intelligence backward child.