Validity and reliability of a dietary assessment method: The application of a digital camera with a mobile phone card attachment
Validity and reliability of a dietary assessment method: The application of a digital camera with a mobile phone card attachment
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DOI：
10.3177/jnsv.48.498
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发表时间：
2002-12-01
影响因子：
1.6
通讯作者：
Kira, S
中科院分区：
文献类型：
--
作者：
Wang, DH;Kogashiwa, M;Kira, S
本研究的目的是评价一种辅助流行病学研究的替代膳食测量方法的有效性和可靠性。我们验证了一个手持个人数字助理与摄像头和移动的电话卡，称为Wellnavi，其中1-d称重饮食记录作为参考方法。20名食品与营养专业的大学生参加了这项研究。他们被要求保持饮食记录，并同时将所有这些记录的食物拍下数码照片，然后通过移动的电话卡发送给营养师。在可靠性研究中，来自同一所大学的另外二十名学生被要求在相同的情况下使用两种相同的仪器拍摄一天中同一顿饭的数码照片，并将这些照片以电子方式发送给不同的营养师。在有效性方面，Wellnavi方法和饮食记录方法估计的中位营养素摄入量具有可比性。从这两种方法估计的平均营养素摄入量之间的相关系数范围从单不饱和脂肪酸的0.46到维生素B-12和铜的0.93（中位数r=0.77）。在可靠性方面，我们的数据显示两台Wellnavi仪器对大多数营养素的测量结果一致。两种仪器估计的营养素摄入量之间的相关系数范围从维生素B-1和水不溶性膳食纤维的0.55到维生素B-12的0.92（中位数r=0.78）。总之，结果表明，这种饮食评估工具可以有效地衡量个人的饮食摄入量的各种营养素的表皮研究。
This study was aimed at evaluation of the validity and reliability of an alternative dietary measurement method that assists epidemiologic studies. We validated a handheld personal digital assistant with camera and mobile phone card, called Wellnavi, in which a 1-d weighed diet record was employed as a reference method. Twenty college students majoring in food and nutrition participated in this study. They were asked to keep a diet record and to take digital photos of all these recorded food at the same time, then send them to the dietitians by the mobile phone card. In the reliability study, other twenty students from the same college were asked to take digital photos of the same meal during a day by two same instruments under the same circumstances and to send these photos to the different dietitians electronically. With respect to validity, median nutrient intakes estimated by the Wellnavi method and the diet record method are comparable. Correlation coefficients between the median nutrient intakes estimated from these two methods ranged from 0.46 for monounsaturated fatty acid to 0.93 for vitamin B-12 and copper (median r=0.77). With respect to reliability, our data show a good agreement between two Wellnavi instruments for most of the nutrients. Correlation coefficients between the nutrient intakes estimated from 2 instruments ranged from 0.55 for vitamin B-1 and water-insoluble dietary fiber to 0.92 for vitamin B-12 (median r=0.78). In conclusion, the results indicate this dietary assessment instrument can usefully measure individual dietary intakes for a variety of nutrients in an epidermologic study.