Validity of a food-frequency questionnaire for a large prospective cohort study in Bangladesh
Validity of a food-frequency questionnaire for a large prospective cohort study in Bangladesh
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DOI：
10.1079/bjn20041277
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发表时间：
2004-11-01
影响因子：
3.6
通讯作者：
Howe, GR
中科院分区：
文献类型：
--
作者：
Chen, Y;Ahsan, H;Howe, GR
在一项前瞻性队列研究中，我们开发了一份包含39个项目的半定量食物频率问卷(FFQ)，以评估孟加拉国饮用水中砷的健康影响，评估了11746名男性和女性的饮食摄入量。为了验证FFQ的有效性，在一年中的两个不同季节，随机选择189名队列参与者，完成了两份7d食物日记(FD)。营养值是根据美国农业部的国家营养数据库和印度次大陆的食物成分表进行换算的。皮尔逊积矩和Spearman非参数等级相关系数由FFQ和7d FD估计的食物和营养消耗量进行比较，基于对数变换的消耗值，调整或不调整总能量和校正个体内差异。常量营养素与总脂肪、单不饱和脂肪、多不饱和脂肪、饱和脂肪、蛋白质、碳水化合物、膳食纤维、钠、钾、维生素B-6、维生素B-12、核黄素、锰、硫胺素、铁等微量营养素的相关性较好，在0.30~0.76之间。然而，其他微量营养素的相关性很弱(
We have developed a thirty-nine-item semi-quantitative food-frequency questionnaire (FFQ) to assess the dietary consumption of 11 746 men and women in a prospective cohort study that evaluates the health effects of As from drinking water in Bangladesh. In order to validate the FFQ, two 7 d food diaries (FD) were completed for 189 randomly selected cohort participants in two different seasons of the year. Nutrient values were converted based on both the United States Department of Agriculture's National Nutrient Database and a food composition table for the Indian subcontinent. Pearson product-moment and Spearman non-parametric rank correlation coefficients comparing food and nutrient consumptions estimated from FFQ and 7 d FD were calculated based on log-transformed consumption values with or without adjustment for total energy and correction for within-individual variation. Correlations of macronutrients and common micronutrients including total fat, monounsaturated fat, polyunsaturated fat, saturated fat, protein, carbohydrate, dietary fibre, Na, K, vitamin B-6, vitamin B-12, riboflavin, Mn, thiamin and Fe were moderately good, ranging from 0.30 to 0.76. However, correlations of other micronutrients were weak (