New Quantitative Index for dietary Diversity (QUANTIDD) and its annual changes in the Japanese
New Quantitative Index for dietary Diversity (QUANTIDD) and its annual changes in the Japanese
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DOI：
10.1016/j.nut.2005.06.014
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发表时间：
2006-03-01
期刊：
影响因子：
4.4
通讯作者：
Matsumura, Y
中科院分区：
文献类型：
--
作者：
Katanoda, K;Kim, HS;Matsumura, Y
目的：多样化的饮食在许多饮食指南中被推荐。然而，由于测量方法没有统一的标准，很难在不同人群或时间点之间进行客观比较。本文提出了一种基于消费食物数量分布的膳食多样性指数，以客观衡量膳食多样性。方法：提出膳食多样性定量指数（QUANTIDD）： QUANTIDD = (1 - Sigma(n)(j) prop [j](2))/(1 - 1/n)，其中prop(j)为食物组(s) j占总能量或营养摄入的比例，n为食物组数，j = 1,2，…，n。分子是这两种食物从一堆食物中分属于不同食物群的概率。分母是它的最大值。取值范围是0 ~ 1。通过使用1957年至2000年日本国家营养调查官方公布的平均数据，我们调查了QUANTIDD的年度变化。我们还利用1996年日本国家营养调查的个人数据调查了该指数的分布。结果：从20世纪60年代到70年代，QUANTIDD呈上升趋势。这是日本经济快速发展的时代，日本人的饮食习惯也发生了迅速的变化。QUANTIDD的分布偏左，但有对数变换。减少了这种不对称性，使其与正态分布相似。结论：该指标能够客观地衡量饮食多样性，适合进行统计处理，可作为比较不同人群或不同时间点饮食模式的一种方法。(c) 2006爱思唯尔公司版权所有。
Objective: A diverse diet is recommended in many dietary guidelines. However, because there are no unified standards for measurement methods, objective comparisons across different populations or time points is difficult. This report proposes a new dietary diversity index based on quantitative distribution of consumed foods to allow objective measurement of dietary diversity.Methods: A Quantitative Index for Dietary Diversity (QUANTIDD) is proposed: QUANTIDD = (1 - Sigma(n)(j) prop [j](2))/(1 - 1/n), where prop(j) is the proportion of food group(s) j that contributes to total energy or nutrient intake, n is the number of food groups, and j = 1,2,...,n. The numerator is the probability that the two foods taken out of an aggregation of consumed foods belong to different food groups. The denominator is its maximum value. The index ranges from 0 to 1. By using the officially released average data from the National Nutrition Survey in Japan from 1957 to 2000, we investigated annual changes in the QUANTIDD. We also investigated the distribution of the index by using individual data from the National Nutrition Survey in Japan in 1996.Results: The QUANTIDD increased from the 1960s to the 1970s. This was the era of rapid economic growth in Japan, during which the dietary habits of the Japanese underwent rapid changes. The distribution of the QUANTIDD was skewed to the left, but logit-transformation. decreased this asymmetry and made it similar to a normal distribution.Conclusion: Because this index can measure dietary diversity objectively and is suitable for statistical handling, it is useful as a method to compare dietary patterns across different populations or time points. (c) 2006 Elsevier Inc. All rights reserved.