An evaluation of food photographs as a tool for quantifying food and nutrient intakes
An evaluation of food photographs as a tool for quantifying food and nutrient intakes
复制标题
将食物照片作为量化食物和营养摄入量的工具进行评估
DOI：
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发表时间：
2000
影响因子：
3.2
通讯作者：
M. Livingstone
中科院分区：
文献类型：
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作者：
Paula J Robson;M. Livingstone
摘要目的评价青壮年使用单份大小彩色食物照片量化连续两天六餐食物和营养素摄入量的误差。设计早餐菜单在两天内保持不变；但午餐和晚餐菜单各不相同。每个人吃的食物的量是通过称量每个人在食用前和食用后的菜肴来确定的。进食后的第二天，所有摄入的食物都以食物照片中显示的数量的分数或倍数进行量化。研究对象30名成年志愿者(男15名，女15名)，年龄18-36岁，完成第一天的方案；27名(90%)完成第二天的方案。结果有些食品比其他食品更难准确定量。最大的误差范围是−38.9%到+284.6%(奶酪)，而最小的误差是果汁(−21.5%到+34.6%，第一天)。所有食用牛奶什锦的受试者(第一天)都高估了(+3.7%到+113.7%)。没有其他食物一直被高估或低估。对于同一受试者在两天早餐中摄入的食物，个体估计误差在大小和/或方向上是不一致的。在群体水平上，大多数营养素估计在摄入量的±10%以内；例外是硫胺素(第一天+10.5%)和维生素E(第一天−10.1%；第二天−15.3%)。根据估计的摄入量，63%到80%的受试者被正确地归类为三种类型。结论尽管存在较大的食物量化误差，但单份食物照片在估计群体水平的营养素摄入量时是有效的。在这项研究中使用的条件下，每种食物更多的照片是否会改善个人层面的营养摄入量估计仍有待确定。
Abstract Objective To evaluate the errors incurred by young adults using single portion size colour food photographs to quantify foods and nutrients consumed at six meals on two non-consecutive days. Design Breakfast menus remained the same for the 2 days; but lunch and dinner menus varied. The amounts of food eaten by individuals were determined by weighing individual serving dishes pre- and post-consumption. The day after eating, all foods consumed were quantified in terms of fractions or multiples of the amounts shown in the food photographs. Subjects Thirty adult volunteers (15 male, 15 female), aged 18–36 years, completed the protocol for day one; 27 (90%) completed day two. Results Some foods were more difficult to quantify accurately than others. The largest error range was −38.9% to +284.6% (cheese), whereas the smallest errors were incurred for juice (−21.5% to +34.6%, day one). All subjects who consumed muesli (day one) overestimated (+3.7% to +113.7%). No other foods were consistently over-or underestimated. For foods consumed at breakfast by the same subjects on both days, individual estimation errors were inconsistent in magnitude and/or direction. At the group level, most nutrients were estimated to within ±10% of intake; exceptions were thiamin (+10.5%, day one) and vitamin E (−10.1%, day one; −15.3%, day two). Between 63% and 80% of subjects were correctly classified into tertiles on the basis of estimated intakes. Conclusions Despite some large food quantification errors, single portion size food photographs were effective when used to estimate nutrient intakes at the group level. It remains to be established whether, under the conditions used in this study, more photographs per food would improve estimates of nutrient intake at the individual level.