The relative validity of vitamin intakes derived from a food frequency questionnaire compared to 24-hour recalls and biological measurements: Results from the EPIC pilot study in Germany
The relative validity of vitamin intakes derived from a food frequency questionnaire compared to 24-hour recalls and biological measurements: Results from the EPIC pilot study in Germany
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DOI：
10.1093/ije/26.suppl_1.s82
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发表时间：
1997-01-01
影响因子：
7.7
通讯作者：
Wahrendorf, J
中科院分区：
文献类型：
--
作者：
Boeing, H;BohlscheidThomas, S;Wahrendorf, J
背景。欧洲癌症和营养前瞻性调查（EPIC）研究德国。1991/1992年，编制了一份自我填写的食物频率问卷，并对其相对有效性和可重复性进行了测试。研究参与者是92名潜在的队列成员。本文报道了有关视黄醇、类胡萝卜素、生育酚和抗坏血酸的研究结果。研究参与者被邀请到海德堡的研究中心，为期一年，每月一次。在每次访问中，获得了24小时的召回。FFQ每隔6个月填写两次（FFQ1, FFQ2）。此外，还完成了关于14大类食物的一般消费频率的问卷调查。该信息与FFQ2的估计值相结合，并计算频率校正的食物和营养素摄入量（FFQ(corr)）， 1992年冬季和夏季采集血样。视黄醇、生育酚、类胡萝卜素和抗坏血酸的类内相关系数为0.65 ~ 0.67。类胡萝卜素摄取量与血值呈去衰减的Pearson相关系数为0.37，召回率为0.44。视黄醇的相关性分别为0.27和0.29，生育酚的相关性分别为0.18和0.52，抗坏血酸的相关性分别为0.36和0.69。FFQ误差（corr）与24小时饮食回忆不相关。总的来说，FFQ能够根据类胡萝卜素和抗坏血酸的摄入或血液浓度对参与者进行有生物学意义的分类，但对生育酚和视黄醇的分类错误更高。
Background. For the European Prospective investigation into Cancer and Nutrition (EPIC) study Germany. a self-administered food frequency questionnaire (FFQ) was developed and tested for its relative validity and reproducibility in 1991/1992. Study participants were 92 potential cohort members. This paper reports results regarding retinol, carotenoids, tocopherols and ascorbic acid.Methods. Study participants were invited to the study centre in Heidelberg once a month over one year. At each visit, a 24-hour recall was obtained. The FFQ was filled in twice with a 6-month interval (FFQ1, FFQ2). In addition, a questionnaire on general consumption frequencies of 14 broad food groups was completed. This information was combined with estimates derived from FFQ2 and frequency-corrected food and nutrient intakes were calculated (FFQ(corr), Blood specimens were taken in winter and summer 1992.Results. The intraclass correlation of the FFQ ranged from 0.65 to 0.67 for retinol, tocopherols, carotenoids, and ascorbic acid. Intake of carotenoids by FFQ(corr) showed de-attenuated Pearson correlation coefficients with blood values in the order of 0.37, and with recall data of 0.44. Respective correlations for retinol were 0.27 and 0.29, for tocopherols 0.18 and 0.52, and for ascorbic acid 0.36 ana 0.69. Errors of FFQ(corr) and 24-hour diet recalls were not correlated.Conclusions. In general, it was demonstrated that the FFQ was able to rank participants into biologically meaningful categories of intake or blood concentrations for carotenoids and ascorbic acid, but misclassification was higher for tocopherol and retinol.