Reproducibility and validity of a food frequency questionnaire among fourth to seventh grade inner-city school children: implications of age and day-to-day variation in dietary intake
Reproducibility and validity of a food frequency questionnaire among fourth to seventh grade inner-city school children: implications of age and day-to-day variation in dietary intake
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DOI：
10.1017/s1368980099000397
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发表时间：
1999-03-01
影响因子：
3.2
通讯作者：
Colditz, Graham A.
中科院分区：
文献类型：
--
作者：
Field, Alison E.;Peterson, Karen E.;Colditz, Graham A.
目的：评估半定量食物频率调查表（FFQ）的重现性和有效性，该调查表根据每日水果和蔬菜的食用量以及卡路里、蛋白质、脂肪、碳水化合物、膳食纤维、维生素 C、磷、钙和铁的摄入量对儿童和青少年进行分类。设计：FFQ 于 1993 年和 1994 年秋季收集。在同一年期间收集了四次 24 小时饮食回忆，并将其平均值与 FFQ 饮食估计值进行比较。环境：低收入的内城区公立学校。对象：109 名市中心四至七年级学生作为样本。结果：通过 Spearman 相关性评估，四年级和五年级学生的 FFQ 的 1 年再现性（范围：r - 0.26 至 0.40）低于六年级和七年级学生（范围：r 0.18-0.47）。在调整膳食摄入量的日常变化后，对于大多数营养素和食物，初中生的 FFQ 和 24 小时回忆之间的相关性仍然较大（四至五年级范围：r 0.0-0.42；六至七年级范围：r 0.07-0.76）。结论：内城区六年级和七年级学生表现出了对过去一年中卡路里、碳水化合物、钙、磷、铁和维生素 C 摄入量进行有效估计的能力。然而，四年级和五年级的孩子在完成 FFQ 时遇到了一些困难。我们的结果表明，在对四年级和五年级的儿童使用该工具之前，研究人员应该评估研究参与者是否能够抽象思考并熟悉“平均摄入量”的概念。
Objective: To assess the reproducibility and validity of a semiquantitative food frequency questionnaire (FFQ) to classify children and adolescents in terms of daily servings of fruits and vegetables and intake of calories, protein, fat, carbohydrate, dietary fibre, vitamin C, phosphorous, calcium and iron. Design: FFQs were collected in the autumn of 1993 and 1994. Four 24-hour diet recalls were collected during the same 1-year period and their mean was compared to the FFQ diet estimates. Setting: Low income, inner- city state schools. Subjects: A sample of 109 inner- city fourth to seventh grade students. Results: The 1-year reproducibility of the FFQ, assessed with Spearman correlations, was lower among the fourth and fifth (range: r - 0.26 to 0.40) than the sixth and seventh grade students (range: r 0.18- 0.47). After adjusting for day- to- day variation in dietary intake, for most nutrients and foods the correlations between the FFQ and the 24-hour recalls remained greater among the junior high school students (fourth to fifth grade range: r 0.0- 0.42; sixth to seventh grade range: r 0.07-0.76). Conclusions: Inner- city sixth and seventh grade students demonstrated the ability to provide valid estimates of intake of calories, carbohydrate, calcium, phosphorous, iron and vitamin C over the past year. However, children in the fourth and fifth grades experienced some difficulty in completing the FFQ. Our results suggest that, before using this instrument with fourth and fifth grade children, investigators should assess whether study participants can think abstractly and are familiar with the concept of ` average intake'.