为了观察缺碘对婴幼儿智能发育的影响，用丹佛发育筛选测验（ＤＤＳＴ）评估了三组不同碘营养状态下的０～２岁婴幼儿。卡方值检验表明，在Ｐ＝０．０５水平上，重度缺碘组的ＤＤＳＴ可疑和异常比率都显著高于轻度缺碘组和正常组；后两组之间没有统计学差异。结果显示随着碘缺乏程度的加重，婴幼儿智能的正常发育受到更大阻碍。 To observe the effects of iodine deficiency on the intelligent development of infants and young children, three groups of infants aged 0-2 years under different iodine nutrition status were assessed using the Denver Developmental Screening Test (DDST). Chi square test showed that at P = 0.05 level, the ratio of suspicious and abnormal DDST in severe iodine deficiency group was significantly higher than that in mild iodine deficiency group and normal group; there was no significant difference between the latter two groups. The results show that with the aggravation of iodine deficiency, the normal development of intelligence in infants and young children is more obstructed.