Background: One of the greatest challenges for nutritional epidemiology is improving upon traditional self-reporting methods for assessing usual dietary intake. Objective: Evaluating the relative validity of a new method known as the current-day dietary recall (current-day recall), based on a Smartphone app called 12-hour dietary recall (e-12HR), for determining the habitual intake of a series of key food/drink groups using a food frequency questionnaire (FFQ) and four dietary records (DRs) as reference methods. Methods: University students over the age of 18 recorded their consumption of certain groups of food/drink using e-12HR for 28 consecutive days. During this 28-day period, they also completed four DRs on randomly selected days. Once the monitoring period was finished, the subjects then completed a FFQ. A comparison was made between the different methods using the Spearman correlation coefficient (SCC), a cross-classification analysis, and weighted kappa (k). Results: A total of 87 participants completed the study (64% women, 56/87; 36% men, 31/87). e-12HR versus FFQ, for all food/drink groups: The average SCC was .70. Crossclassification analysis showed that the average percentage of individuals classified in the exact agreement category was 51.5%; exact agreement + adjacent was 91.8%; and no participant (0.0%) was classified in the extreme disagreement category. The average k was .51. e-12HR versus the four DRs, for all food/drink groups: The average SCC was .63. Crossclassification analysis showed that the average percentage of individuals classified in the exact agreement category was 47.1%; exact agreement + adjacent was 89.2%; and no participant (0.0%) was classified in the extreme disagreement category. The average k was .47. Conclusions: Current-day recall, based on the e-12HR app, is in good agreement with the two reference methods (FFQ & four DRs), demonstrating its potential usefulness for categorizing individuals according to the usual dietary intake of certain food/drink groups.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.