Lin Xiaoming, Liu Xiangye, Long Zhu, Shen Xiaoyi
School of Public Health, Peking University, Beijing 100083, China.
Wei Sheng Yan Jiu. 2003 Jan;32(1):13-5.
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) microgram to be 59.7% of the RNI; The average concentration of serum VA was (1.01 +/- 0.29) mumol/L, 59.0% of subjects have serum VA lower than 1.05 mumol/L, in which, 12.8% of them were lower than 0.70 mumol/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 1.02 mumol/L in ID phase to 0.97 mumol/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.
了解北京山区农村学龄儿童的维生素A（VA）状况、亚临床VA缺乏的检出率以及VA与铁的相关性。在膳食调查中，对305名7 - 13岁儿童进行静脉穿刺采集血样，测定血清VA及血液学指标。膳食能量、蛋白质和铁的摄入量均>推荐营养素摄入量（RNI）和适宜摄入量（AI）的85%，但VA的膳食摄入量为（513.7±286.1）微克，占RNI的59.7%；血清VA的平均浓度为（1.01±0.29）μmol/L，59.0%的受试者血清VA低于1.05μmol/L，其中12.8%低于0.70μmol/L，只有41.0%的受试者血清水平正常。随着缺铁从铁缺乏（ID）期加重到缺铁性贫血（IDA）期，血清VA的平均浓度从ID期的1.02μmol/L降至IDA期的0.97μmol/L。但该趋势无统计学意义。结果显示，农村学龄儿童中亚临床VA缺乏率为59.0%，因此VA缺乏是北京山区农村学龄儿童的主要营养问题。
