Novel Technologies for Assessing Dietary Intake: Evaluating the Usability of a Mobile Telephone Food Record Among Adults and Adolescents
Novel Technologies for Assessing Dietary Intake: Evaluating the Usability of a Mobile Telephone Food Record Among Adults and Adolescents
复制标题
DOI：
10.2196/jmir.1967
复制
发表时间：
2012-03-01
影响因子：
7.4
通讯作者：
Boushey, Carol J.
中科院分区：
文献类型：
--
作者：
Daugherty, Bethany L.;Schap, TusaRebecca E.;Boushey, Carol J.
背景：移动电话食物记录的发展有可能改善与当前饮食评估方法相关的许多负担。在使用手机食物记录时，受访者在进食前后捕捉到他们的食物和饮料的图像。图像分析和体积估计方法允许食品的自动识别和体积估计。为了获得合适的图像，图像中必须包含所有食品和饮料以及基准标记。目的：评估青少年和成年人在使用手机食物记录捕捉图像时的一套明确的技能，并比较成年人和青少年对使用手机食物记录的看法和偏好。方法：招募135名志愿者（青少年78名，成人57名），在控制条件下使用手机进食记录进行一餐或两餐。志愿者们在第一餐前接受了使用手机食物记录的指导，在进食前后拍摄了食物和饮料的图像，并参加了一个反馈环节。我们使用卡方来比较成人和青少年之间的技能、偏好和感知，使用McNemar检验来比较青少年和成人之间的比较。结果：成年人比青少年更有可能在前后图像中包括所有的食物和饮料，但两个年龄组都难以包括整个基准标记。与青少年相比，更多的成年人在第一次用餐前（38%对58%，P = .03）和之后（25%对50%，P = .008）需要捕捉不止一张图像来获得合适的图像。尽管使用手机记录食物的效率较低，但成年人比青少年更容易记住捕捉图像（P < 0.001）。结论：两个年龄组中的大多数人都能够遵循定义的技能集；然而，成年人在使用手机食物记录时效率较低。额外的互动培训可能是必要的，为所有用户提供额外的实践，在进入自由生活的情况下捕获图像。这些结果将为手机食物记录的特定年龄发展提供信息，这可能转化为更准确的饮食评估方法。
Background: The development of a mobile telephone food record has the potential to ameliorate much of the burden associated with current methods of dietary assessment. When using the mobile telephone food record, respondents capture an image of their foods and beverages before and after eating. Methods of image analysis and volume estimation allow for automatic identification and volume estimation of foods. To obtain a suitable image, all foods and beverages and a fiducial marker must be included in the image.Objective: To evaluate a defined set of skills among adolescents and adults when using the mobile telephone food record to capture images and to compare the perceptions and preferences between adults and adolescents regarding their use of the mobile telephone food record.Methods: We recruited 135 volunteers (78 adolescents, 57 adults) to use the mobile telephone food record for one or two meals under controlled conditions. Volunteers received instruction for using the mobile telephone food record prior to their first meal, captured images of foods and beverages before and after eating, and participated in a feedback session. We used chi-square for comparisons of the set of skills, preferences, and perceptions between the adults and adolescents, and McNemar test for comparisons within the adolescents and adults.Results: Adults were more likely than adolescents to include all foods and beverages in the before and after images, but both age groups had difficulty including the entire fiducial marker. Compared with adolescents, significantly more adults had to capture more than one image before (38% vs 58%, P = .03) and after (25% vs 50%, P = .008) meal session 1 to obtain a suitable image. Despite being less efficient when using the mobile telephone food record, adults were more likely than adolescents to perceive remembering to capture images as easy (P < .001).Conclusions: A majority of both age groups were able to follow the defined set of skills; however, adults were less efficient when using the mobile telephone food record. Additional interactive training will likely be necessary for all users to provide extra practice in capturing images before entering a free-living situation. These results will inform age-specific development of the mobile telephone food record that may translate to a more accurate method of dietary assessment.