Validation of Energy Intake Recorded by a 7-day Pre-coded Food Diary Against Measured Energy Expenditure, 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. Data are freely available for downloading.