Relative and biomarker-based validity of a food frequency questionnaire that measures the intakes of vitamin B12, folate, iron, and zinc in young women
Relative and biomarker-based validity of a food frequency questionnaire that measures the intakes of vitamin B12, folate, iron, and zinc in young women
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DOI：
10.1016/j.nutres.2010.12.004
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发表时间：
2011-01-01
影响因子：
4.5
通讯作者：
Samman, Samir
中科院分区：
文献类型：
--
作者：
Fayet, Flavia;Flood, Victoria;Samman, Samir
叶酸、维生素B-12、铁和锌是育龄妇女特别重要的营养素。我们测试了一个假设，即电子，235项，半定量的食物频率问卷（FFQ）是一个有效的措施，饮食摄入量相比，重复饮食24小时回忆。叶酸、维生素Bp、铁和锌的生物标志物被确定，因为它们的测量误差与饮食问卷中的误差无关。年龄在18 - 35岁的女性成年人（N = 256）完成了FFQ，一个代表性的子集（n = 53）完成了重复饮食24小时回忆。叶酸的FFQ估计值（平均值+/- SD）为315 +/- 132 μ g，维生素B-12为3.1 +/- 2.1 μ g，铁为15.4 +/- 5.6 mg，锌为15.1 +/- 6.4 mg。通过两种方法，能量摄入量在相同+/- 1四分位数内的妇女百分比为77.3%。两种饮食方法之间存在中度一致性，并且在能量、叶酸、维生素B-12和锌方面未发现系统偏倚。去衰减能量调整的相关系数范围为0.41（膳食叶酸当量）至0.60（叶酸）。叶酸（r = 0.37，P <0.01）和维生素B-12（r = 0.27，P <0.01）的生物标志物和营养素摄入量之间存在显著相关性。本研究开发的电子FFQ是一种相对有效的工具，能够根据营养摄入量对个体进行充分评估和排名。(C)2011 Elsevier Inc.艾尔rights reserved.
Folate, vitamin B-12, iron, and zinc are particularly important nutrients for women of childbearing age. We tested the hypothesis that an electronic, 235-item, semiquantitative food frequency questionnaire (FFQ) is a valid measure of dietary intake when compared with repeat dietary 24-hour recalls. Biomarkers of folate, vitamin Bp, iron, and zinc were determined because their measurement errors are unrelated to errors in dietary questionnaires. Female adults (N = 256) aged 18 to 35 years completed the FFQ, and a representative subset (n = 53) completed repeat dietary 24-hour recalls. The FFQ estimates (mean +/- SD) were 315 +/- 132 mu g for folate, 3.1 +/- 2.1 mu g for vitamin B-12, 15.4 +/- 5.6 mg for iron, and 15.1 +/- 6.4 mg for zinc. The percentage of women classified within the same +/- 1 quartile for energy intake by the 2 methods was 77.3%. There was moderate agreement between the 2 dietary methods, and no systematic bias was noted for energy, folate, vitamin B-12, and zinc. The deattenuated energy-adjusted correlation coefficients ranged from 0.41 (dietary folate equivalents) to 0.60 (folate). Significant correlations between biomarker and nutrient intakes were found for folate (r = 0.37, P < .01) and vitamin B-12 (r = 0.27, P < .01). The electronic FFQ developed in the present study is a relatively valid tool that was able to adequately assess and rank individuals according to their nutrient intakes. (C) 2011 Elsevier Inc. Al! rights reserved.