An Interactive Internet-Based Plate for Assessing Lunchtime Food Intake: A Validation Study on Male Employees
2013 (English)In: Journal of Medical Internet Research, ISSN 1438-8871, Vol. 15, no 1, 1-13 p.Article in journal (Refereed) Published
Background: Misreporting food intake is common because most health screenings rely on self-reports. The more accurate methods (eg, weighing food) are costly, time consuming, and impractical.
Objectives: We developed a new instrument for reporting food intake—an Internet-based interactive virtual food plate. The objective of this study was to validate this instrument’s ability to assess lunch intake.
Methods: Participants were asked to compose an ordinary lunch meal using both a virtual and a real lunch plate (with real food on a real plate). The participants ate their real lunch meals on-site. Before and after pictures of the composed lunch meals were taken. Both meals included identical food items. Participants were randomized to start with either instrument. The 2 instruments were compared using correlation and concordance measures (total energy intake, nutritional components, quantity of food, and participant characteristics).
Results: A total of 55 men (median age: 45 years, median body mass index [BMI]: 25.8 kg/m2) participated. We found an overall overestimation of reported median energy intake using the computer plate (3044 kJ, interquartile range [IQR] 1202 kJ) compared with the real lunch plate (2734 kJ, IQR 1051 kJ, P<.001). Spearman rank correlations and concordance correlations for energy intake and nutritional components ranged between 0.58 to 0.79 and 0.65 to 0.81, respectively.
Conclusion: Although it slightly overestimated, our computer plate provides promising results in assessing lunch intake.
Place, publisher, year, edition, pages
Toronto: Internet Healthcare Coalition , 2013. Vol. 15, no 1, 1-13 p.
diet, epidemiology, Internet, methods, nutrition, validation, Web
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:hh:diva-21543DOI: 10.2196/jmir.2217ISI: 000315113200019PubMedID: 23335728OAI: oai:DiVA.org:hh-21543DiVA: diva2:607193
Article number: e132013-02-222013-02-222013-10-15Bibliographically approved