Vasileiou Aikaterina, Searle Dominique, Larsen Sofus C, Magkos Faidon, Horgan Graham, Stubbs R James, Santos Inês, Palmeira António L, Heitmann Berit L
Department of Food Science, University of Copenhagen, Copenhagen, Denmark.
The Parker Institute, Research Unit for Dietary Studies, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.
Nutrition. 2024 Feb;118:112258. doi: 10.1016/j.nut.2023.112258. Epub 2023 Oct 9.
The aim of this study was to compare self-reported total energy intake (TEI) collected using an online multiple-pass 24-h dietary recall tool (Intake24) with total energy expenditure (TEE) estimated from Fitbit Charge 2-improved algorithms in adults from the NoHoW trial (12-mo weight maintenance after free-living weight loss).
Bland-Altman plots were used to assess the level of agreement between TEI and TEE at baseline and after 12 mo. The ratio of TEI to TEE was also calculated.
Data from 1323 participants (71% female) was included in the analysis (mean ± SD: age 45 ± 12 y, body mass index 29.7 ± 5.4 kg/m, initial weight loss 11.5 ± 6.5 kg). The TEI was lower than TEE on average by 33%, with limits of agreement ranging from -91% to +25%. Men, younger individuals, those with higher body mass index, those with the greater weight loss before enrollment, and those who gained weight during the study underestimated to a greater extent.
These findings contribute to the ongoing research examining the validity of technology-based dietary assessment tools.
