Villena-Esponera María Pilar, Moreno Rojas Rafael, Mateos-Marcos Sonia, Salazar-Donoso Marco Vinicio, Molina Recio Guillermo
Universidad de Córdoba.
Pontificia Universidad Católica del Ecuador Sede Esmeraldas (PUCESE).
Nutr Hosp. 2019 Apr 10;36(2):363-371. doi: 10.20960/nh.2147.
Introduction: the use of real images of food portions constitutes a useful and effective tool to help measure the amount of food consumed. Objective: to validate content and visual perception of the images of a photographic atlas of food portions designed for Ecuador. Methods: first, eight experts assessed the content in an atlas of food portions, using the Delphi technique. Then, 56 adults (aged 18-59) gave an assessment of their visual perception of about 35 portions of nine selected products. The concordance in the estimation using the atlas versus an estimation without the atlas was evaluated through the intra-class correlation coefficient (ICC), the Bland-Altman graphical method, and a hypothesis contrast. The differences between the real amounts and the estimation were assessed using the Wilcoxon test (p < 0.05). For each of the food items, the percentage of participants who chose the correct photograph, the one directly above or below was calculated. Results: the assessment carried out by experts showed that this instrument is relevant and appropriate. ICC values of between 0.576 and 0.956 were obtained using the atlas, as well as significant differences between the real amounts and the estimation without the atlas (p < 0.001). There was a sufficient correlation between the actual image and its perception for all food items except mayonnaise. The correct photograph was chosen in 66% of 500 estimations. Conclusions: the photographic atlas of food portions for Ecuador is an appropriate tool for helping to estimate the amount of food consumed by adults.
使用食物份量的真实图像是一种有用且有效的工具，有助于测量食物摄入量。目的：验证为厄瓜多尔设计的食物份量摄影图谱的内容和视觉感知。方法：首先，八位专家使用德尔菲技术评估了食物份量图谱的内容。然后，56名成年人（年龄在18至59岁之间）对九种选定产品的约35份份量的视觉感知进行了评估。通过组内相关系数（ICC）、布兰德-奥特曼图形法和假设对比，评估了使用图谱估计与不使用图谱估计之间的一致性。使用威尔科克森检验评估实际份量与估计值之间的差异（p < 0.05）。对于每种食物，计算选择正确照片（即正上方或正下方照片）的参与者百分比。结果：专家进行的评估表明该工具相关且合适。使用图谱获得的ICC值在0.576至0.956之间，并且实际份量与不使用图谱的估计值之间存在显著差异（p < 0.001）。除蛋黄酱外，所有食物的实际图像与其感知之间都有足够的相关性。在500次估计中，66%的估计选择了正确的照片。结论：厄瓜多尔食物份量摄影图谱是帮助估计成年人食物摄入量的合适工具。
