The results showed that the lower Zn level and higher blood Pb level in the premature and SGA groups were significant.

• 结果表明,四种微量元素失衡的发生率分别为:早产儿缺锌2363%25,缺碘090%25,缺铁090%25,铅高4363%25;小于胎龄儿缺锌2530%25,缺碘120%25,缺铁120%25,铅高4096%25;与正常组(锌1132%25,缺碘172%25,缺铁119%25,铅高2002%25)比,血锌均明显低于正常组,血铅均明显高于对照组,血碘、均无明显差异。