Accuracy in the estimation of food servings against the portions in food photographs
Accuracy in the estimation of food servings against the portions in food photographs
复制标题
DOI：
10.1038/sj.ejcn.1602758
复制
发表时间：
2008-05-01
影响因子：
4.7
通讯作者：
Mannisto, S.
中科院分区：
文献类型：
--
作者：
Ovaskainen, M-L;Paturi, M.;Mannisto, S.
目的：在饮食调查中，食物消费量的定量低估可能是由于故意误报或误报。将食物照片用作评估实际数量的辅助手段可能会产生影响。本研究旨在评估食物照片的有效性。设计：一项实时测试协议，其中52份食物与类似食物的照片部分进行比较。（在图尔库），161名成年人参与，并为146名受试者，收集完整的数据。正确估计和报告错误的比例（以权重和百分比表示）按性别和食物类别列出。食物描述符，部分大小的选项和主题的特点进行了研究，作为潜在的决定因素，在部分大小estimation.Results的准确估计的总比例是51%的男性和49%的女性。对于52份食物，男性的总体报告误差为-10 g，女性为+1 g。低报是典型的面包，蔓延和冷盘和菜肴在两个性别。男女对谷类食物的报告过多，妇女对零食、蔬菜和水果的报告过多。估计误差与部分大小的选项，但不相关的能量密度的食物项目，教育或身体质量index.Conclusions：照片中的食物部分似乎是一个有用的援助，大多数食物项目的量化。然而，验证研究需要测试的适用性照片估计目前的部分，并寻找更好的工具，在饮食调查。
Objective: In diet surveys, quantitative underestimation of food consumption may be due to intentional misreporting or false portion-size reporting. Perception of food photographs used as aids for assessing the actual amounts may have an effect. This study was carried out to assess the validity of food photographs.Design: A real-time test protocol where 52 presented food servings were compared against photographed portions with similar food items.Subjects: Volunteers from the Rehabilitation Company Petrea (in Turku) were recruited, 161 adults participated, and for 146 subjects, complete data were collected.Methods: The proportions of correct estimations and reporting errors, in weights and percentages, are presented by gender and food group. Food descriptors, portion- size options and subject characteristics were studied as potential determinants of accuracy in portion- size estimation.Results: The total proportion of exactly correct estimations was 51% in men and 49% in women. The overall reporting error was -10 g in men and +1 g in women for the 52 food servings. Underreporting was typical for bread, spread and cold cuts and dishes in both genders. Over-reporting was typical for cereals in both genders and for snacks, vegetables and fruit in women. The estimation error was associated with the portion- size options but not associated with the energy density of food items, education or body mass index.Conclusions: Food portions in photographs seem to be a useful aid for the quantification of most food items. However, validation studies are needed to test the applicability of photographs for estimating current portions and for searching better tools in dietary surveys.