Participant characteristics associated with errors in self-reported energy intake from the Women's Health Initiative food-frequency questionnaire
Participant characteristics associated with errors in self-reported energy intake from the Women's Health Initiative food-frequency questionnaire
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DOI：
10.1093/ajcn/76.4.766
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发表时间：
2002-10-01
影响因子：
7.1
通讯作者：
Prentice, RL
中科院分区：
文献类型：
--
作者：
Horner, NK;Patterson, RE;Prentice, RL
背景资料：自我报告的饮食摄入量的错误威胁着依赖于食物频率问卷（FFQ）、食物记录和食物召回等工具的研究的推论。目的：目的是量化与女性健康倡议FFQ估计的能量摄入量相关的错误的幅度、方向和预测因素。设计：绝经后妇女（n = 102）提供了与自我报告的能量摄入错误相关的社会人口统计学和心理社会特征数据。能量摄入量的客观估计包括总能量消耗、体力活动消耗和食物的热效应结果：参与者在FFQ上少报了20.8%的能量摄入;该误差随着年龄的增长（P = 0.07）和社会期望值的增加（P = 0.09）而增加，但与体重指数无关（P = 0.95）。报告的能量摄入量和总能量消耗之间的相关系数为0.24;受教育程度较低、身体质量指数较高、无脂肪质量较大、社会期望值较高以及对身体尺寸不满意的女性相关性较高（均P < 0.10）。能量摄入量通常被低估，误差的大小和自我报告与客观估计摄入量的关联似乎因参与者的特征而异。依赖于自我报告摄入量的研究应包括参与者亚组的能量消耗的客观测量，以确定饮食自我报告工具研究人群中的个体特异性偏倚;这些数据应用于校准自我报告数据，作为饮食和疾病关联研究的一个组成部分。
Background: Errors in self-reported dietary intake threaten inferences from studies relying on instruments such as food-frequency questionnaires (FFQs), food records, and food recalls.Objective: The objective was to quantify the magnitude, direction, and predictors of errors associated with energy intakes estimated from the Women's Health Initiative FFQ.Design: Postmenopausal women (n = 102) provided data on sociodemographic and psychosocial characteristics that relate to errors in self-reported energy intake. Energy intake was objectively estimated as total energy expenditure, physical activity expenditure, and the thermic effect of food (10% addition to other components of total energy expenditure).Results: Participants underreported energy intake on the FFQ by 20.8%; this error trended upward with younger age (P = 0.07) and social desirability (P = 0.09) but was not associated with body mass index (P = 0.95). The correlation coefficient between reported energy intake and total energy expenditure was 0.24; correlations were higher among women with less education, higher body mass index, and greater fat-free mass, social desirability, and dissatisfaction with perceived body size (all P < 0.10).Conclusions: Energy intake is generally underreported, and both the magnitude of the error and the association of the self-reporting with objectively estimated intake appear to vary by participant characteristics. Studies relying on self-reported intake should include objective measures of energy expenditure in a subset of participants to identify person-specific bias within the study population for the dietary self-reporting tool; these data should be used to calibrate the self-reported data as an integral aspect of diet and disease association studies.