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Towards Using the Instrumented Timed Up-and-Go Test for Screening of Sensory System Performance for Balance Control in Older Adults

1
Network Aging Research, Heidelberg University, Bergheimer Strasse 20, 69115 Heidelberg, Germany
2
Institute of Sports and Sports Sciences, Heidelberg University, 69120 Heidelberg, Germany
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(3), 622; https://doi.org/10.3390/s19030622
Received: 28 December 2018 / Revised: 29 January 2019 / Accepted: 31 January 2019 / Published: 1 February 2019
(This article belongs to the Special Issue Sensors to Manage Chronic Complications)
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Abstract

Background: Decreasing performance of the sensory systems’ for balance control, including the visual, somatosensory and vestibular system, is associated with increased fall risk in older adults. A smartphone-based version of the Timed Up-and-Go (mTUG) may allow screening sensory balance impairments through mTUG subphases. The association between mTUG subphases and sensory system performance is examined. Methods: Functional mobility of forty-one community-dwelling older adults (>55 years) was measured using a validated mTUG. Duration of mTUG and its subphases ‘sit-to-walk’, ‘walking’, ‘turning’, ‘turn-to-sit’ and ‘sit-down’ were extracted. Sensory systems’ performance was quantified by validated posturography during standing (30 s) under different conditions. Visual, somatosensory and vestibular control ratios (CR) were calculated from posturography and correlated with mTUG subphases. Results: Vestibular CR correlated with mTUG total time (r = 0.54; p < 0.01), subphases ‘walking’ (r = 0.56; p < 0.01), and ‘turning’ (r = 0.43; p = 0.01). Somatosensory CR correlated with mTUG total time (r = 0.52; p = 0.01), subphases ‘walking’ (r = 0.52; p < 0.01) and ‘turning’ (r = 0.44; p < 0.01). Conclusions: Supporting the proposed approach, results indicate an association between specific mTUG subphases and sensory system performance. mTUG subphases ‘walking’ and ‘turning’ may allow screening for sensory system deterioration. This is a first step towards an objective, detailed and expeditious balance control assessment, however needing validation in a larger study. View Full-Text
Keywords: Timed Up-and-Go; mobile sensing; screening; mobility Timed Up-and-Go; mobile sensing; screening; mobility
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Gerhardy, T.; Gordt, K.; Jansen, C.-P.; Schwenk, M. Towards Using the Instrumented Timed Up-and-Go Test for Screening of Sensory System Performance for Balance Control in Older Adults. Sensors 2019, 19, 622.

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