Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Norway.
Br J Nutr. 2011 May;105(10):1530-8. doi: 10.1017/S0007114510005246. Epub 2011 Jan 28.
The aim of the present study was to validate the intakes of fruit, juice and vegetables from an FFQ. In sub-study I (n 147), intakes from the FFQ were evaluated against 7 d weighed food records (WR) and plasma carotenoid concentrations, whereas in sub-study II (n 85), the intakes were evaluated against plasma carotenoid concentrations and amounts of flavonoids in 24 h urine samples. Relative validity was evaluated by comparing median intakes, estimating correlation coefficients and validity coefficients using the method of triads. In sub-study I, we observed no significant difference in daily median fruit intake between the FFQ and the WR, whereas the intake of vegetables was higher from the FFQ than from the WR. The correlations between intakes from the FFQ and the WR ranged from 0·31 to 0·58. In sub-study II, the intakes of fruit and vegetables correlated significantly with plasma carotenoid concentrations and urinary flavonoids. The validity coefficients for the intakes of fruit and vegetables from the FFQ ranged from 0·61 to 0·88 in sub-study I and from 0·60 to 0·94 in sub-study II. In summary, based on the associations observed between intakes from the FFQ and the biomarkers and the FFQ validity coefficients, the FFQ was found valid and suitable for ranking individuals according to their usual intake of fruit, juice and vegetables.
本研究的目的是验证来自食物频率问卷（FFQ）的水果、果汁和蔬菜摄入量。在子研究 I（n=147）中，FFQ 的摄入量通过 7 天称重食物记录（WR）和血浆类胡萝卜素浓度进行评估，而在子研究 II（n=85）中，FFQ 的摄入量通过血浆类胡萝卜素浓度和 24 小时尿液中类黄酮的含量进行评估。相对有效性通过比较中位数摄入量、估计相关系数和使用三联体方法评估有效性系数来评估。在子研究 I 中，我们观察到 FFQ 和 WR 之间每日中位数水果摄入量没有显著差异，而 FFQ 中的蔬菜摄入量高于 WR。FFQ 和 WR 摄入量之间的相关性范围从 0.31 到 0.58。在子研究 II 中，水果和蔬菜的摄入量与血浆类胡萝卜素浓度和尿液类黄酮显著相关。FFQ 水果和蔬菜摄入量的有效性系数在子研究 I 中为 0.61-0.88，在子研究 II 中为 0.60-0.94。总之，基于从 FFQ 和生物标志物观察到的摄入量之间的关联以及 FFQ 的有效性系数，发现 FFQ 是有效和适合根据个体通常的水果、果汁和蔬菜摄入量进行排名的。
