1. Exploratory analysis of swallowing behaviour in community-dwelling older adults using a wearable device: Differences by age and ingestant under different task loads.
- Author
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Tsujimoto M, Hisajima T, Matsuda S, Tanaka S, Suzuki K, Shimokakimoto T, and Toyama Y
- Abstract
Objective: To develop a new method of evaluating swallowing behaviour., Methods: Sixty-nine healthy participants were divided into a younger (16 males and 16 females, mean age 39.09 ± 12.16 years) and older (18 males and 19 females, mean age 71.43 ± 5.50 years) group. The participants ingested water and yoghurt twice (directed and free swallowing) at rest and after performing simple daily life tasks (calculation and exercise). To measure swallowing frequency, we employed a smartphone-based, portable and neck-worn swallowing-sound-monitoring device. This device monitors swallowing behaviour continuously by collecting biological sounds from the neck without imposing behavioural restrictions. A neural network model of swallowing sound identification by deep learning was used for the subsequent evaluation. This device was used to obtain two types of saliva-swallowing sounds associated with different ingestants, at rest and after performing a stimulating task. Furthermore, we assessed the associated subjective psychological states., Results: The younger group showed a higher directed swallowing frequency (for both water and yoghurt) than the older group did. Regarding the type of ingestant, the swallowing frequency for yoghurt was higher during free swallowing in both the young and the older groups. 'Feeling calm' was reported significantly more often in the older group after swallowing yoghurt following exercise., Conclusions: Swallowing status in daily life was measured non-invasively using a wearable mobile device. It is important to consider the type of ingestant, daily living activities, and age when assessing swallowing., Competing Interests: This study was jointly performed by the National Center for Geriatrics and Gerontology, PLIMES Inc, and Meiji Co, Ltd. YT holds the position of joint research chair, and MT is a leading researcher in joint research. MT, SM, and TS received funding from Meiji Co, Ltd for this study. TH and YT are employees of Meiji Co, Ltd, which provided the yoghurt used in this study. ST and KS declare no competing interests., (© The Author(s) 2024.)
- Published
- 2024
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