Validity and reproducibility of the food frequency questionnaire used in the Shanghai Women's Health Study
Validity and reproducibility of the food frequency questionnaire used in the Shanghai Women's Health Study
复制标题
DOI：
10.1038/sj.ejcn.1601738
复制
发表时间：
2004-01-01
影响因子：
4.7
通讯作者：
Zheng, W
中科院分区：
文献类型：
--
作者：
Shu, XO;Yang, G;Zheng, W
为评价上海妇女健康研究（SWHS）所用食物频率问卷（FFQ）的信度和效度，对200名SWHS参与者进行了膳食校正研究。研究参与者在基线和24小时饮食回忆（24-HDR）完成FFQ，每月两次，连续12个月。研究结束时，进行第二次FFQ。在200名研究参与者中，196人完成了24天或更长时间的24小时饮食回忆，191人完成了两次FFQ，本报告的结果基于此。FFQ包括的食物占24-HDR调查中记录的食物的86%。通过比较从第二次FFQ获得的主要营养素和食物的摄入水平与从多个24-HDR获得的摄入水平，评估FFQ的有效性。根据第二次FFQ和24-HDR得出的主要营养素（大米、家禽和肉类）的摄入量中位数相似，差异范围为1.3%至12.1%。FFQ倾向于高估总蔬菜和总水果的摄入量，这种差异主要是由于FFQ中多报了季节性蔬菜和水果的摄入量。由FFQ和多重24-HDR评估的营养素和食物摄入量相关性非常好，常量营养素的相关系数为0.59-0.66，微量营养素的相关系数为0.41-0.59，主要食物组的相关系数为0.41-0.66。FFQ的可靠性通过比较从两个FFQ（间隔约2年）获得的营养素和食物组的相关性和中位摄入量来评估。根据两份问卷得出的选定营养素及食物组别的摄入量中位数相若，相差少于10%。在个人层面上，从两个FFQ获得的这些饮食变量的摄入水平也相关良好。当营养素和食物组摄入量被分为四分位数时，FFQ和24-HDR产生的准确一致率在33%和50%之间。对相邻四分位数的错误分类是常见的，范围从34- 48%，而对极端四分位数的错误分类是罕见的（1-6%）。这些数据表明，SWHS FFQ可以可靠和准确地测量上海市妇女的主要营养素和食物组的日常摄入量。
To evaluate the validity and reliability of the food frequency questionnaire (FFQ) used in the Shanghai Women's Health Study (SWHS), 200 SWHS participants were recruited for a dietary calibration study. Study participants completed an FFQ at baseline and 24-h dietary recalls (24-HDR) twice per month consecutively for 12 months. At the end of the study, a second FFQ was administered. Of the 200 study participants, 196 completed 24 or more days of 24-h dietary recalls, 191 completed two FFQs from whom the results of this report were based. The FFQ included the foods that accounted for 86% of the foods recorded in the 24-HDR surveys. Validity of the FFQ was evaluated by comparing intake levels of major nutrients and foods obtained from the second FFQ with those derived from the multiple 24-HDR. The median intake for major nutrients, rice, poultry and meat derived from the second FFQ and the 24-HDR was similar, with the differences ranging from 1.3 to 12.1%. The FFQ tended to overestimate the intake level of total vegetables and total fruits, and the differences were explained mainly by over-reporting seasonal vegetables and fruits consumption in the FFQ. Nutrient and food intake assessed by the FFQ and the multiple 24-HDR correlated very well, with the correlation coefficients being 0.59-0.66 for macronutrients, 0.41-0.59 for micronutrients, and 0.41-0.66 for major food groups. The reliability of the FFQ was assessed by comparing the correlation and median intake of nutrients and food groups obtained from the two FFQs that were administered approximately 2 y apart. The median intake levels for selected nutrients and food groups derived from the two FFQs were similar with differences below 10%. At the individual level, the intake levels of these dietary variables obtained from two FFQs also correlated well. When nutrient and food group intakes were categorized into quartiles, FFQ and 24-HDR produced exact agreement rates between 33 and 50%. Misclassification to adjacent quartile was common, ranging from 34-48%, while misclassification to an extreme quartile was rare (1-6%). These data indicate that the SWHS FFQ can reliably and accurately measure usual intake of major nutrients and food groups among women in Shanghai.