Krall E A, Dwyer J T
Tufts University, Boston.
J Am Diet Assoc. 1987 Oct;87(10):1374-7.
The purpose of this study was to compare intakes of eight nutrients computed from a food frequency questionnaire (FFQ) and from 3-day food diaries with known values. Total food intake of 19 healthy adult volunteers (10 men and 9 women) was monitored for 2 weeks. Each week, subjects completed a 3-day diary and a 1-week FFQ. Subjects had previously completed one diary and one FFQ with respect to their usual diets. FFQs and diaries were analyzed for calories, protein, fat, cholesterol, calcium, iron, vitamin A, and vitamin C. All nutrients were underestimated by the FFQ (all p less than .05). Subjects omitted foods from the FFQ and incorrectly reported consumption frequencies. Vitamin A (p less than .001) and calories (p less than .05) were underestimated by the food diary. It is concluded that factors such as frequency of eating, pairing of foods, and explicitness of FFQ items affect recall accuracy. Those factors could influence the choice of FFQ design and administration.
本研究的目的是将通过食物频率问卷（FFQ）和3天食物日记计算得出的8种营养素摄入量与已知值进行比较。对19名健康成年志愿者（10名男性和9名女性）的食物总摄入量进行了为期2周的监测。每周，受试者需完成一份3天的日记和一份为期1周的FFQ。受试者此前已就其日常饮食完成过一份日记和一份FFQ。对FFQ和日记进行了卡路里、蛋白质、脂肪、胆固醇、钙、铁、维生素A和维生素C的分析。FFQ对所有营养素的估计值均偏低（所有p值均小于0.05）。受试者在FFQ中遗漏了食物，并错误地报告了食用频率。食物日记对维生素A（p值小于0.001）和卡路里（p值小于0.05）的估计值偏低。研究得出结论，进食频率、食物搭配以及FFQ项目的明确性等因素会影响回忆准确性。这些因素可能会影响FFQ设计和实施的选择。
