碘缺乏对人群智力影响的研究

对乌鲁木齐地甲病轻、重病区和非病区的8～12岁1664名儿童进行了智力测验,重病区儿童智商为72.84,轻病区为77.97,非病区为88.65。智力落后者重病区占35.95％,轻病区占20.95％,非病区占5.60％。经补碘后重病区儿童智商可提高11.79。用选择反应时试验,重病区错误次数在6次以上者占32.80％、10次以上占36.80％,明显多于非病区儿童。

Study of the Effect of Iodine Deficiency on Human Intelligence

A total of 1664 schoolchildren aged 8-12 years from mildly affected, severely affected and unaffected areas with endemic goitre in Urumqi were examined by intelligence test. It was found that intelligence quotient (IQ) of children from severely affected areas was 72.84, that from mildly affected areas was 77.97, and that from unaffected areas was 88.65. Children with mental deficiency accounted for 35.95% in severely affected areas, 20.95% in mildly affected areas and 5.60% in unaffected areas. Iodine supplementation led to improvement of IQ by 11.79. Choice reaction time test detected much more children with more than 6 mistakes in severely affected than in unaffected areas: in severely affected areas 32.80% of the subjects had 6 mistakes or more and 36.80% had 10 mistakes or more. The results confirmed that iodine deficiency could seriously affect human intelligence development.