关键词: 膳食调查, 方法学, 即时性图像法, 24 h膳食回顾, 学龄前儿童

Abstract: Objective To assess the usefulness and efficiency of a new method of dietary assessment with instant photography applied in preschool children's dietary survey.Methods Sixty preschool children and their parents were recruited with informed consent for a dietary assessment study.The preschool children were served with a meal at noon with foodstuff accurately weighed before cooking.The parents were asked to take photographs of all dietary items by the designed way in which three views of foods in different angle were recorded with a smart phone or a digital camera.The remainder foods were also photographically recorded after the meal.In next day,the parents were interviewed for food amount supplied to their children by investigators by a 24 h dietary recall.The digital files of dietary images were then transferred by internet to investigators.The works of the dietary recall,the image quantification and weighing method were operated by three different groups.Energy and nutrient intakes were calculated for each subject from the meal. Results Compared to the data from 24 h dietary recall,food amount data estimated by image quantification were more correlated with weighed data except fruits and beltfish.Also they were more close to weighed data and had smaller standard deviation except meat and beltfish.Values of energy and almost all the nutrients calculated based on food weight from image quantification were more close to those of weighed data compared to the 24 h dietary recall.Conclusion The method of dietary assessment with instant photography can be effectively used in preschool children's dietary survey and has more efficiency than conventional 24 h dietary recall.

Key words: dietary survey, methodology, dietary assessment with instant photography, 24 hour dietary recall, preschool children