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使用Ｓｔａｎｔｏｒｄ－Ｂｉｒｅｄ量表，对地方性克汀病及地方性甲状腺肿病区补碘前处于胚胎至婴幼期的儿童和碘盐稳定供应３～４年后出生的儿童进行智力测验，结果表明碘缺乏地区确实存在众多的智力低下儿童，主要集中在补碘前出生的儿童。为观察稳定供碘后儿童智力发育的变化情况，我们对地方性克汀病区的受试儿童追踪观察了两年。结果表明未能进一步改善儿童的智力水平，说明胚胎至婴幼期缺碘对儿童智力发育的损害是不可逆性的。
The use of Stantord-Bired scale, endemic cretinism and endemic goiter area pre-iodine in embryos to infants and iodized salt stable supply of children born after 3 to 4 years of intelligence tests conducted, the results show There are indeed many children with mental retardation in areas of iodine deficiency, mostly children born before iodine supplementation. To observe the changes in mental development of children after stable iodine supply, we tracked the children tested for endemic cretinism for two years. The results showed that children’s mental status could not be further improved, indicating that the impairment of children’s mental development from embryo to infancy is irreversible.