北京市6～13岁儿童维生素A营养水平及影响因素

Vitamin A Level and Influencing Factors of Children Aged 6 ～ 13 in Beijing City

目的:了解北京市6~13岁儿童维生素A营养水平及影响因素。方法:于2017年采用多阶段分层抽样对北京市982名6~13岁儿童进行调查,分析血清维生素A水平与食物种类、视黄醇活性当量摄入量、血生化指标、体格等指标的关联。结果:血清维生素A缺乏率和边缘缺乏率分别为0.10%、10.5%;膳食维生素A摄入量低于平均需要量的比例为71.6%(以视黄醇活性当量计);血清维生素A水平与年龄、BMI、血红蛋白水平、铁蛋白水平、蔬菜摄入量存在显著正相关(P<0.05),与超敏C反应蛋白存在显著负相关(P<0.05)。结论:北京市6~13岁儿童维生素A整体缺乏率较低,但仍有部分儿童处于边缘缺乏状态。膳食维生素A摄入量按视黄醇活性当量计算不能满足膳食营养素推荐供给量的风险高,蔬菜摄入量可能是血清维生素A水平的影响因素之一。

Objective To understand the level of vitamin A nutrition and its influencing factors among children aged 6~13 in Beijing city. Method Totally 982 childern aged 6~13 years in Beijing city were investigated by multi-stage stratified sampling in 2017.The correlation between serum vitamin A level and food types,retinol active equi vitamin A lent intake,blood biochemical and physical measurement was analyzed. Result Serum vitamin A deficiency rate and marginal deficiency rate were 0.10 % and 10.5 % respectively.The proportion of dietary vitamin A intake below average requirement was 71.6 %(measured by retinol activity equi vitamin A lent).Serum vitamin A level was positively correlated with age,BMI,hemoglobin,ferritin,vegetable intake( P <0.05),and was negatively correlated with hypersensitive C-reactive protein( P <0.05). Conclusion The rate of vitamin A deficiency among children aged 6~13 in Beijing city is low,but some children are still marginal deficiency.Dietary vitamin A intake calculated by retinol activity equi vitamin A lent is at high risk of not meeting the recommended dietary nutrient supply.Vegetable intake may be one of the factors affecting blood vitamin A level.