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通过对宁夏固原县什字乡（缺碘地区）和黄锋堡乡（非缺碘地区）１９８名３５～４５岁育龄妇女妊娠生育史的回顾性调查，发现缺碘地区碘盐防治后婴幼儿死亡率（１２．００％）显著低于碘盐防治前（２０．６４％）（Ｐ＜０．０００１）。缺碘地区孕产异常（早产、流产、难产）及畸形发生率较非缺碘地区显著增高，女性月经初潮年龄明显延迟。作者认为，缺碘是造成上述结果的主要因素之一。
A retrospective survey on the history of pregnancy in 198 women of childbearing age 35-45 in Guixian Township of Guyuan County of Ningxia (iodine deficient area) and Huangfeng Fort Township (non-iodine deficiency area) found that infants and young children Mortality (12.00%) was significantly lower than that before iodized salt control (20.64%) (P <0.0001). Abnormal iodine area maternal anomalies (preterm birth, miscarriage, dystocia) and deformity were significantly higher than non-iodine-deficient areas, women’s menarche age was significantly delayed. The author believes that iodine deficiency is one of the main factors contributing to the above results.