Abdullah M, Ahmed L
Institute of Nutrition and Food Science, University of Dhaka, Bangladesh.
Eur J Clin Nutr. 1993 Feb;47(2):115-22.
The International Vitamin A Consultative Group (IVACG) developed guidelines for a simplified dietary assessment to identify groups at risk to an inadequate intake of vitamin A. This study was conducted in Bangladesh to validate this simplified approach. The individual food intakes of 121 children, aged 2-5 years, were measured in a two-round weighted household dietary survey for three consecutive days in 112 households in two ecologically different locations. On each next day following the day of weighed dietary survey the simplified questionnaire designed to estimate the preschool child's intake of food sources of vitamin A was administered. The intake of food sources of vitamin A obtained by the two methods was converted both into equivalent units and into consumption index (CI) scores for comparison. There was a very strong agreement between the CI scores obtained by the two methods. Although matched paired tests showed some difference between the mean CIs obtained by the two methods, as far as the identification of children at high risk is concerned (which is the objective of the simplified assessment) there was no marked difference between the two methods. The study revealed that the simplified method can fairly predict the vitamin A intake of preschool children and thus can be regarded as a useful tool for identifying groups at risk to inadequate intake of vitamin A. Large seasonal variations in the habitual intake pattern of vitamin A confirm the necessity of obtaining information on the usual consumption patterns of seasonally available food sources of vitamin A, in addition to the 24-h intake estimates.
国际维生素A咨询小组（IVACG）制定了简化饮食评估指南，以确定维生素A摄入不足风险人群。本研究在孟加拉国开展，旨在验证这种简化方法。在两个生态环境不同地区的112个家庭中，对121名2至5岁儿童进行了连续三天两轮的家庭饮食加权调查，测量了他们的个人食物摄入量。在称重饮食调查日之后的每一天，都发放了旨在估算学龄前儿童维生素A食物来源摄入量的简化问卷。通过两种方法获得的维生素A食物来源摄入量都被换算成等效单位并转化为消费指数（CI）得分进行比较。两种方法获得的CI得分之间存在非常强的一致性。尽管配对检验显示两种方法获得的平均CI之间存在一些差异，但就识别高危儿童（这是简化评估的目标）而言，两种方法之间没有显著差异。研究表明，简化方法能够较好地预测学龄前儿童的维生素A摄入量，因此可被视为识别维生素A摄入不足风险人群的有用工具。除了24小时摄入量估计值外，维生素A习惯性摄入模式的巨大季节性变化证实了获取季节性可得维生素A食物来源通常消费模式信息的必要性。
