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目的研究复合微量营养素对学龄儿童记忆能力的影响。方法采用随机双盲对照实验,选择四川省城乡各一所小学9～11岁儿童为观察对象,将275名儿童以班为单位,随机分为试验组和对照组。试验组儿童服用复合微量营养素咀嚼片,对照组儿童服用安慰剂咀嚼片,干预时间4个月。在干预前、后分别进行记忆能力、智力水平、反应时等指标测定。结果试验组儿童记忆商及累积计数、视觉再生、触摸测验项目量表分显著高于对照组(P<0.05)。农村试验组儿童的记忆商增加值大于农村对照组(P<0.05)。试验组和对照组智力水平在补充复合微量营养素前后差异无显著性。结论复合微量营养素在一定程度上改善了儿童记忆能力。
Objective To study the effect of compound micronutrients on memory ability of school-age children. Methods A randomized, double-blind controlled trial was conducted to select children from 9 to 11 years of primary school in urban and rural areas in Sichuan Province. 275 children were randomly divided into experimental group and control group. Children in the experimental group took compound micronutrient chewable tablets, while children in the control group took placebo chewable tablets for 4 months. Before and after intervention, respectively, memory, intelligence, reaction time and other indicators measured. Results In the experimental group, scores of children’s memory and cumulative counts, visual regeneration and touch test items were significantly higher than those of the control group (P <0.05). Children in rural experimental group had higher value of memory added than rural control group (P <0.05). There was no significant difference between the experimental group and the control group before and after the supplementation of compound micronutrients. Conclusion Compound micronutrients improve children’s memory ability to a certain extent.