Reproducibility and relative validity of a semi-quantitative food frequency questionnaire for Chinese pregnant women.
Reproducibility and relative validity of a semi-quantitative food frequency questionnaire for Chinese pregnant women.
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DOI：
10.1186/s12937-015-0044-x
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发表时间：
2015-06-04
影响因子：
5.4
通讯作者：
Yang X
中科院分区：
文献类型：
--
作者：
Zhang H;Qiu X;Zhong C;Zhang K;Xiao M;Yi N;Xiong G;Wang J;Yao J;Hao L;Wei S;Yang N;Yang X
在大型营养流行病学研究中，食物频率问卷（FFQ）是估计膳食摄入量的可靠工具，但目前尚缺乏一种适用于中国城市孕妇的有效的FFQ。本研究旨在评估在中国中部进行的一项队列研究中，用于估计城市孕妇膳食摄入量的半定量FFQ的可重复性和有效性。在可重复性研究中，123名健康孕妇在妊娠12-13周完成了第一次FFQ，在妊娠3-4周后完成了第二次FFQ。为了验证FFQ，孕妇在两次FFQ之间完成了3次24小时回忆（24hr）。食品（坚果）和营养物质（碘）的类内相关系数分别为0.23 ~ 0.49（水果）和0.24 ~ 0.58（硒），均具有统计学显著性。两种方法之间未经调整的Pearson相关系数范围从0.28（豆类）到0.53（水果）不等，从0.15（碘）到0.59（蛋白质）不等。食物的能量调整和去衰减相关系数从0.35（豆类）到0.56（水果）不等，营养成分从0.11（碘）到0.63（蛋白质）不等，除碘、钠和核黄素外，所有相关性在统计上都很显著。平均而言，67.0%（51.2% - 80.5%）的妇女根据其食物摄入量被两种方法划分为相同或相邻的五分位数，而68.5%（56.1% - 77.2%）的妇女根据营养摄入量被划分为相同或相邻的五分位数。食物（平均2.0%）和营养成分（平均2.2%）的极端错误分类都非常低。Bland-Altman图也显示了两种方法之间合理的可接受的一致性。该FFQ是评估中国中部城市孕妇大多数食物和营养摄入量的一种合理可靠和有效的工具。
Food frequency questionnaire (FFQ) is a reliable tool to estimate dietary intake in large nutritional epidemiological studies, but there is lack of a current and validated FFQ for use in urban Chinese pregnant women. This study aimed to evaluate the reproducibility and validity of a semi-quantitative FFQ designed to estimate dietary intake among urban pregnant women in a cohort study conducted in central China. In the reproducibility study, a sample of 123 healthy pregnant women completed the first FFQ at 12–13 weeks gestation and the second FFQ 3–4 weeks later. To validate the FFQ, the pregnant women completed three 24-h recalls (24HRs) between the intervals of two FFQs. The intraclass correlation coefficients of two administrations of FFQ for foods ranged from 0.23 (nuts) to 0.49 (fruits) and for nutrients from 0.24 (iodine) to 0.58 (selenium) and coefficients were all statistically significant. The unadjusted Pearson correlation coefficients between two methods ranged from 0.28 (beans) to 0.53 (fruits) for foods and from 0.15 (iodine) to 0.59 (protein) for nutrients. Energy-adjusted and de-attenuated correlation coefficients for foods ranged from 0.35 (beans) to 0.56 (fruits) and for nutrients from 0.11 (iodine) to 0.63 (protein), and all correlations being statistically significant except for iodine, sodium and riboflavin. On average, 67.0 % (51.2 %-80.5 %) of women were classified by both methods into the same or adjacent quintiles based on their food intakes, while 68.5 % (56.1 %-77.2 %) of women were classified as such based on nutrient intakes. Extreme misclassifications were very low for both foods (average of 2.0 %) and nutrients (average of 2.2 %). Bland-Altman Plots also showed reasonably acceptable agreement between two methods. This FFQ is a reasonably reliable and valid tool for assessing most food and nutrient intakes of urban pregnant women in central China.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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