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报告了运用希斯基－内布拉斯加学习能力测验量表，对青海省互助土族自治县１１９７名６～１６岁儿童青少年进行了智力调查。碘缺乏病区东和乡７１１名在校者平均智商为８０±１６．９９；３６７名非在校者平均智商为７０±１８．０４。对照区西山乡１１９名在校者平均智商为８６±１８．２１（Ｐ＜０．０１）。东和乡在校和非在校智商达５０～５９者分别占８．０２％和１９．３５％，西山乡仅为５．０４％。这一结果表明，缺碘可使人的精神发育受损，致精神发育迟滞。
Reported the use of the Heathrow-Nebraska Learning Ability Test Scale to conduct an intelligence survey of 1197 children and adolescents aged 6-16 years in Huzhu Tu Autonomous County, Qinghai Province. The average IQ of 711 students in Donghe township of iodine deficiency sickness district was 80 ± 16.99; the average IQ of 367 non-school children was 70 ± 18.04. The average IQ of 119 students in Xishan Township was 86 ± 18.21 (P <0.01). Donghe township schools and non-school intelligence reached 50 to 59, accounting for 8.02% and 19.35%, respectively, Xishan Township, only 5.04%. This result shows that iodine deficiency can make people’s mental development impaired, resulting in mental retardation.