摘要
为观察学龄儿童维生素A(VA)营养状况、亚临床VA缺乏患病率及VA与铁的相关性 ,对北京房山山区 1 0 1 2名 7～ 1 3岁学龄儿童进行膳食调查 ,随机抽取 30 5名儿童 ,静脉采血于避光下分离血清 ,用高效液相色谱法检测血清VA含量 ,同时测定其血清铁蛋白 (SF)、红细胞游离原卟啉 (FEP)和血红蛋白 (Hb) ,并依现行标准将其分为正常、铁缺乏 (ID)、红细胞生成缺铁期 (IDE)与缺铁性贫血 (IDA)四组 ,观察VA与铁的相关性。结果显示受检儿童膳食总能量、蛋白质和铁平均每日摄入量均达到膳食营养素的推荐摄入量 (RNI)及适宜摄入量 (AI) ,但平均每日VA摄入量为 (51 3 7± 2 86 1 ) μgRE ,仅占RNI的 59 7% ;血清VA平均含量为(1 0 1± 0 2 9) μmol L ,血清VA低于 1 0 5μmol L者占受检儿童的 59 0 % ,其中 1 2 8%的儿童血清VA低于0 70 μmol L ,正常及以上者仅占 41 0 %。并观察到血清VA含量与机体铁状况有相互随对方下降而减低的趋势。结果表明 ,该地区儿童存在明显的VA缺乏 ,应加强营养教育。
To understand the VA status, the detectable rate of the sub clinical VA deficiency and the correlation of VA and iron in the rural school age children of Beijing Mountain Area.In the dietary survey ,blood samples were collected by venopunction and serum VA, and hematological index were determined in 305 children 7—13 years. The intakes of dietary energy,protein and iron were>85% of the RNI and AI,but dietary intake of VA were (513 7±286 1)μg to be 59 7% of the RNI; The average concentration of serum VA was (1 01±0 29) μmol/L, 59 0% of subjects have serum VA lower than 1 05μmol/L, in which, 12 8% of them were lower than 0 70μmol/L, and only 41 0% of subjects were normal levels of serum. With aggravation of iron deficiency from ID to IDA phase, the average serum VA concentrations were descending from 1 02μmol/L in ID phase to 0 97μmol/L in IDA phase. But the trend has no statistical significance. The results showed that sub clinical VA deficiency was 59 0% in the rural school age children, so VA deficiency was a main nutritional problem in rural school age children of Beijing mountain area.
出处
《卫生研究》
CAS
CSCD
北大核心
2003年第1期13-16,共4页
Journal of Hygiene Research
基金
达能营养研究中心基金资助 (No .99 8 2 6 )
