Evaluation of web-based, self-administered, graphical food frequency questionnaire.
Evaluation of web-based, self-administered, graphical food frequency questionnaire.
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DOI：
10.1016/j.jand.2013.11.017
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发表时间：
2014-04
影响因子：
4.8
通讯作者：
Paskett, Electra D.
中科院分区：
文献类型：
--
作者：
Kristal, Alan R.;Kolar, Ann S.;Fisher, James L.;Plascak, Jesse J.;Stumbo, Phyllis J.;Weiss, Rick;Paskett, Electra D.
关键词：
Computer-administered food frequency questionnaires (FFQs) can address limitations inherent in paper questionnaires, by allowing very complex skip patterns, portion size estimation based on food pictures and real-time error checking. This manuscript evaluates a web-based FFQ, the Graphical Food Frequency System (GraFFS). Participants completed the GraFFS, six, telephone-administered 24-hr dietary recalls over the next 12 weeks, followed by a second GraFFS. Participants were 40 men and 34 women, ages 18–69, living in the Columbus, OH area. Intakes of energy, macronutrients and 17 micronutrients/food components were estimated from the GraFFS and the mean of all recalls. Bias (recalls minus the second GraFFS) was −9%, −5%, +4% and −4% for energy and percentages of energy from fat, carbohydrate and protein. De-attenuated, energy-adjusted correlations (inter-method reliability) between the recalls and the second GraFFS for fat, carbohydrate, protein and alcohol were 0.82, 0.79, 0.67 and 0.90; for micronutrients/food components the median was 0.61 and ranged from 0.40 for zinc to 0.92 for β-carotene. The correlations between the two administrations of the GraFFS (test-retest reliability) for fat, carbohydrate, protein and alcohol were 0.60, 0.63, 0.73 and 0.87; among micronutrients/food components the median was 0.67 and ranged from 0.49 for vitamin B12 to 0.82 for fiber. The measurement characteristics of the GraFFS were at least as good as those reported for most paper FFQs, and its high inter-method reliability suggests that further development of computer-administered FFQs is warranted.
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影响因子：
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通讯作者：
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