%0 Journal Article
%@ 1438-8871
%I Gunther Eysenbach
%V 15
%N 1
%P e13
%T An Interactive Internet-Based Plate for Assessing Lunchtime Food Intake: A Validation Study on Male Employees
%A Svensson,Madeleine
%A Bellocco,Rino
%A Bakkman,Linda
%A Trolle Lagerros,Ylva
%+ Karolinska Institutet, Department of Medicine, Unit of Clinical Epidemiology, T2, Stockholm, 171 76, Sweden, 46 8 517 791 73, Madeleine.Svensson@hh.se
%K diet
%K epidemiology
%K Internet
%K methods
%K nutrition
%K validation
%K Web
%D 2013
%7 18.01.2013
%9 Original Paper
%J J Med Internet Res
%G English
%X 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. 
%M 23335728
%R 10.2196/jmir.2217
%U http://www.jmir.org/2013/1/e13/
%U https://doi.org/10.2196/jmir.2217
%U http://www.ncbi.nlm.nih.gov/pubmed/23335728