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目的 研究南通市学龄前儿童维生素C营养状况及影响因素。 方法 用 2 ,4-二硝基苯肼比色法测定 4h负荷尿中总抗坏血酸的含量 ,用调查表收集可能的影响因素 ,并进行相应的统计分析。 结果 4h负荷尿中总抗坏血酸的含量在冬、春两季分别平均为 2 4.10mg、3 6.0 6mg ;两季分别有 9.77%、6.40 %的儿童维生素C营养不足 ;经多元逐步回归分析 ,季节、健康教育、居住地等三项因素被选入回归模型。 结论 对幼儿及其家长施行营养知识与饮食卫生习惯的健康教育可望改善幼儿维生素C营养状况 ;在冬季更应注意给儿童提供新鲜蔬菜、水果 ,以保证维生素C的供给量。
Objective To study the nutritional status and influencing factors of vitamin C in preschool children in Nantong City. Methods The contents of total ascorbic acid in urine after 4 hours were measured by 2,4-dinitrophenylhydrazine colorimetric method. The possible influencing factors were collected by questionnaire and the corresponding statistical analysis was made. Results The contents of total ascorbic acid in urine after 4 hours were respectively 2. 4.10 mg and 3 6.0 6 mg in winter and spring, 9.77% and 6.40% in two seasons respectively. After multiple stepwise regression analysis, Health education, place of residence and other three factors were selected regression model. Conclusion The health education of young children and their parents on nutritional knowledge and dietary hygiene habits is expected to improve the nutrition status of young children. In winter, more attention should be paid to providing children with fresh vegetables and fruits so as to ensure the supply of vitamin C.