Division of Nutrition, Department of Food and Environmental Sciences, University of Helsinki, PO Box 66, FI-00014 University of Helsinki, Finland.
Public Health Nutr. 2013 Sep;16(9):1558-64. doi: 10.1017/S1368980012003655. Epub 2012 Aug 8.
To assess the validity of food photographs in portion size estimation among adolescent girls in Mozambique. The study was carried out in preparation for the larger ZANE study, which used the 24 h dietary recall method.
Life-sized photographs of three portion sizes of two staple foods and three sauces were produced. Participants ate weighed portions of one staple food and one sauce. After the meal, they were asked to estimate the amount of food with the aid of the food photographs.
Zambezia Province, Mozambique.
Ninety-nine girls aged 13–18 years.
The mean differences between estimated and actual portion sizes relative to the actual portion size ranged from 219% to 8% for different foods. The respective mean difference for all foods combined was 25% (95% CI 212, 2 %). Especially larger portions of the staple foods were often underestimated. For the staple foods, between 62% and 64% of the participants were classified into the same thirds of the distribution of estimated and actual food consumption and for sauces, the percentages ranged from 38% to 63%. Bland–Altman plots showed wide limits of agreement.
Using life-sized food photographs among adolescent Mozambican girls resulted in a rather large variation in the accuracy of individuals’ estimates. The ability to rank individuals according to their consumption was, however, satisfactory for most foods. There seems to be a need to further develop and test food photographs used in different populations in Sub-Saharan Africa to improve the accuracy of portion size estimates.
评估食物照片在莫桑比克青春期女孩中估计食物份量的有效性。这项研究是为更大规模的 ZANE 研究做准备，该研究使用了 24 小时膳食回顾法。
制作了两种主食和三种酱汁的三种份量的实物大小的照片。参与者吃了称重的一份主食和一份酱汁。用餐后，他们在食物照片的帮助下估计食物的量。
莫桑比克赞比西亚省。
99 名年龄在 13-18 岁的女孩。
相对于实际份量，不同食物的估计份量与实际份量之间的平均差异范围从 219%到 8%不等。所有食物的平均差异为 25%（95%置信区间 212，2%）。特别是较大份量的主食往往被低估。对于主食，62%至 64%的参与者被归入估计和实际食物摄入量分布的相同三分之一，而对于酱汁，百分比范围从 38%到 63%不等。Bland–Altman 图显示了广泛的一致性界限。
在莫桑比克青春期女孩中使用实物大小的食物照片会导致个体估计的准确性存在较大差异。然而，根据他们的消费对个人进行排名的能力对于大多数食物来说是令人满意的。似乎需要进一步开发和测试在撒哈拉以南非洲不同人群中使用的食物照片，以提高食物份量估计的准确性。
