Department of Nutrition, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway.
PLoS One. 2019 Apr 18;14(4):e0215638. doi: 10.1371/journal.pone.0215638. eCollection 2019.
The aim of this study was to validate energy intake (EI) reported by a pre-coded food diary (PFD) against energy expenditure (EE) measured by the ActiReg system consisting of an activity and position monitor and a calculation program (ActiCalc). Dietary intake was recorded by the PFD and EE was measured by the ActiReg system over a 7-day period. One hundred and twenty adult participants completed the study, 42 men and 78 women. The average group EI was 17% lower compared to measured EE. The 95% limits of agreement were 6.7 and -2.9 MJ/day. Of all participants, 68% were classified as acceptable reporters, 29% as underreporters and only 3% as overreporters. Fifty percent of the men and 30% of the women were classified into the same quartile for EI and EE, whereas 5% of both men and women were ranked in the opposite quartile by the two methods (weighted kappa coefficient = 0.29). Pearson correlation coefficient between reported EI and measured EE was 0.49 (p<0.001). High BMI was related to larger underreporting when EE was low. Furthermore, this study found that PFD underestimates EI on the group level with an average of 17% and showed large variation in the validity of the PFD on the individual level.
本研究旨在验证预编码食物日记（PFD）报告的能量摄入（EI）与由活动和位置监测器和计算程序（ActiCalc）组成的 ActiReg 系统测量的能量消耗（EE）之间的一致性。通过 PFD 记录膳食摄入量，通过 ActiReg 系统在 7 天内测量 EE。共有 120 名成年参与者完成了这项研究，其中 42 名男性和 78 名女性。平均组 EI 比测量的 EE 低 17%。95%一致性界限为 6.7 和-2.9 MJ/天。所有参与者中，68%被归类为可接受的报告者，29%为低报者，只有 3%为高报者。50%的男性和 30%的女性被归入 EI 和 EE 的相同四分位数，而 5%的男性和女性则被两种方法归入相反的四分位数（加权kappa 系数=0.29）。报告的 EI 与测量的 EE 之间的 Pearson 相关系数为 0.49（p<0.001）。当 EE 较低时，高 BMI 与低报的情况更严重。此外，本研究发现，PFD 平均低估了 17%的组水平 EI，并在个体水平上显示了 PFD 的有效性存在很大差异。
