@Article{info:doi/10.2196/jmir.2217,
author="Svensson, Madeleine
and Bellocco, Rino
and Bakkman, Linda
and Trolle Lagerros, Ylva",
title="An Interactive Internet-Based Plate for Assessing Lunchtime Food Intake: A Validation Study on Male Employees",
journal="J Med Internet Res",
year="2013",
month="Jan",
day="18",
volume="15",
number="1",
pages="e13",
keywords="diet; epidemiology; Internet; methods; nutrition; validation; Web",
abstract="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. ",
issn="1438-8871",
doi="10.2196/jmir.2217",
url="http://www.jmir.org/2013/1/e13/",
url="https://doi.org/10.2196/jmir.2217",
url="http://www.ncbi.nlm.nih.gov/pubmed/23335728"
}