School of Molecular Bioscience, Charles Perkins Centre, University of Sydney, Camperdown, Australia.
JMIR Mhealth Uhealth. 2015 Oct 27;3(4):e98. doi: 10.2196/mhealth.4613.
The electronic Dietary Intake Assessment (e-DIA), a digital entry food record mobile phone app, was developed to measure energy and nutrient intake prospectively. This can be used in monitoring population intakes or intervention studies in young adults.
The objective was to assess the relative validity of e-DIA as a dietary assessment tool for energy and nutrient intakes using the 24-hour dietary recall as a reference method.
University students aged 19 to 24 years recorded their food and drink intake on the e-DIA for five days consecutively and completed 24-hour dietary recalls on three random days during this 5-day study period. Mean differences in energy, macro-, and micronutrient intakes were evaluated between the methods using paired t tests or Wilcoxon signed-rank tests, and correlation coefficients were calculated on unadjusted, energy-adjusted, and deattenuated values. Bland-Altman plots and cross-classification into quartiles were used to assess agreement between the two methods.
Eighty participants completed the study (38% male). No significant differences were found between the two methods for mean intakes of energy or nutrients. Deattenuated correlation coefficients ranged from 0.55 to 0.79 (mean 0.68). Bland-Altman plots showed wide limits of agreement between the methods but without obvious bias. Cross-classification into same or adjacent quartiles ranged from 75% to 93% (mean 85%).
The e-DIA shows potential as a dietary intake assessment tool at a group level with good ranking agreement for energy and all nutrients.
电子膳食摄入评估（e-DIA）是一种数字录入食物记录的手机应用程序，旨在前瞻性地测量能量和营养素摄入。它可用于监测人群摄入量或年轻人的干预研究。
本研究旨在评估 e-DIA 作为膳食评估工具测量能量和营养素摄入的相对有效性，以 24 小时膳食回顾作为参考方法。
19-24 岁的大学生连续 5 天使用 e-DIA 记录食物和饮料摄入量，并在 5 天研究期间的 3 天内随机完成 24 小时膳食回顾。使用配对 t 检验或 Wilcoxon 符号秩检验评估两种方法之间能量、宏量和微量营养素摄入的平均差异，并计算未调整、能量调整和去权重值的相关系数。Bland-Altman 图和四分位交叉分类用于评估两种方法之间的一致性。
80 名参与者完成了研究（38%为男性）。两种方法的能量或营养素平均摄入量无显著差异。去权重相关系数范围为 0.55 至 0.79（平均值为 0.68）。Bland-Altman 图显示两种方法之间的一致性界限较宽，但没有明显的偏差。相同或相邻四分位交叉分类的范围为 75%至 93%（平均值为 85%）。
e-DIA 作为一种膳食摄入评估工具，在群组水平上具有良好的能量和所有营养素的排名一致性，具有一定潜力。
