【摘要】 目的　了解北京市 5岁以下儿童维生素A水平 ,探讨其缺乏的原因。　方法　采用现场体检、问卷及实验室检验等方法在北京市抽样调查。　结果　北京市 5岁以下儿童维生素A平均值为 33.5 7μg/dl,高于全国水平 (30 .4μg/dl) ,按年龄组统计 ,均值以 6个月以内婴儿为最低。北京市 5岁以下儿童维生素A缺乏患病率为 4.98% ,亚临床缺乏型为 33.18%。均为农村山区高于城市和农村平原 ;调查中约 30 %的家长对婴儿辅食添加及基础营养知识认识不足。　结论　采取干预措施 ,加强对医务工作者有关维生素A等方面健康教育及对家长的宣教工作是当务之急。更多还原

【Abstract】 Objective To know the serum vitamin A (VA) levels in children under 5 years old and seek the causes of deficiency. Methods A Provincial sampling survey was carried out by physical examination and questionnaire and laboratory examination. Results Result showed that the mean was 33.57 μg/dl in the children under 5 years old which was higher than the national level(30.4 μg/dl).Analysis by age groups,the lowest mean level was in the group of under six months old.In Beijing,the prevalence of deficiency of vitamin A was 4.98%,the prevalence in rural mountain area was higher than in city and plain area;The subclinical status is 33.18%.In this survey,about 30% parents didn’t have enough knowledge of complementary foods and basic nutrition. Conclusions Urgent matter is tocarry out suitable intervention measures,intensify education of knowledge of vitamin A for health care workers and to carry out the parents.更多还原