Ovaskainen M-L, Paturi M, Reinivuo H, Hannila M-L, Sinkko H, Lehtisalo J, Pynnönen-Polari O, Männistö S
Department of Health Promotion and Prevention of Chronic Diseases, Nutrition Unit, National Public Health Institute, Mannerheimintie 166, Helsinki, Finland.
Eur J Clin Nutr. 2008 May;62(5):674-81. doi: 10.1038/sj.ejcn.1602758. Epub 2007 Apr 18.
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.
A real-time test protocol where 52 presented food servings were compared against photographed portions with similar food items.
Volunteers from the Rehabilitation Company Petrea (in Turku) were recruited, 161 adults participated, and for 146 subjects, complete data were collected.
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.
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.
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.
在饮食调查中，食物摄入量的定量低估可能是由于故意误报或错误的分量报告。使用食物照片作为辅助手段来评估实际摄入量可能会产生影响。本研究旨在评估食物照片的有效性。
一种实时测试方案，将52份呈现的食物份量与类似食物项目的照片份量进行比较。
招募了来自图尔库的Petrea康复公司的志愿者，161名成年人参与，146名受试者收集到了完整数据。
按性别和食物类别列出正确估计和报告误差的比例，以重量和百分比表示。研究食物描述词、份量选项和受试者特征作为份量估计准确性的潜在决定因素。
男性完全正确估计的总比例为51%，女性为49%。对于这52份食物份量，男性的总体报告误差为-10克，女性为+1克。面包、涂抹酱、冷切肉和菜肴在男女中均存在典型的少报情况。谷物在男女中以及女性的零食、蔬菜和水果中均存在典型的多报情况。估计误差与份量选项有关，但与食物项目的能量密度、教育程度或体重指数无关。
照片中的食物份量似乎是量化大多数食物项目的有用辅助手段。然而，需要进行验证研究，以测试照片在估计当前份量以及在饮食调查中寻找更好工具方面的适用性。
