Metro North Hospital and Health Service, Queensland Children's Hospital, Brisbane, QLD 4101, Australia.
School of Medicine and Dentistry, Griffith University, Brisbane, QLD 4215, Australia.
Nutrients. 2021 Dec 3;13(12):4354. doi: 10.3390/nu13124354.
To investigate eating episodes in a group of adolescents in their home-setting using wearable electromyography (EMG) and camera, and to evaluate the agreement between the two devices.
Fifteen adolescents (15.5 ± 1.3 years) had a smartphone-assisted wearable-EMG device attached to the jaw to assess chewing features over one evening. EMG outcomes included chewing pace, time, episode count, and mean power. An automated wearable-camera worn on the chest facing outwards recorded four images/minute. The agreement between the camera and the EMG device in detecting eating episodes was evaluated by calculating specificity, sensitivity, and accuracy.
The features of eating episodes identified by EMG throughout the entire recording time were (mean (SD)); chewing pace 1.64 (0.20) Hz, time 10.5 (10.4) minutes, episodes count 56.8 (39.0), and power 32.1% (4.3). The EMG device identified 5.1 (1.8) eating episodes lasting 27:51 (16:14) minutes whereas the cameras indicated 2.4 (2.1) episodes totaling 14:49 (11:18) minutes, showing that the EMG-identified chewing episodes were not all detected by the camera. However, overall accuracy of eating episodes identified ranged from 0.8 to 0.92.
The combination of wearable EMG and camera is a promising tool to investigate eating behaviors in research and clinical-settings.
使用可穿戴肌电图（EMG）和摄像机在家中环境中研究一组青少年的进食情况，并评估两种设备之间的一致性。
15 名青少年（15.5±1.3 岁）将智能手机辅助的可穿戴 EMG 设备附着在下巴上，以评估一个晚上的咀嚼特征。EMG 结果包括咀嚼频率、时间、进食次数和平均功率。一个自动可穿戴摄像机戴在胸部，面向外，每分钟记录 4 张图像。通过计算特异性、敏感性和准确性来评估摄像机和 EMG 设备在检测进食事件中的一致性。
整个记录时间内 EMG 识别的进食事件特征为（平均值（标准差））；咀嚼频率 1.64（0.20）Hz，时间 10.5（10.4）分钟，进食次数 56.8（39.0）次，功率 32.1%（4.3）。EMG 设备识别出 5.1（1.8）次持续 27:51（16:14）分钟的进食事件，而摄像机则指示 2.4（2.1）次总共 14:49（11:18）分钟的进食事件，表明 EMG 识别的咀嚼事件并非全部被摄像机检测到。然而，进食事件的整体识别准确率在 0.8 到 0.92 之间。
可穿戴 EMG 和摄像机的结合是一种很有前途的工具，可以在研究和临床环境中研究进食行为。
