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Open AccessArticle

Measurement System for Unsupervised Standardized Assessment of Timed “Up & Go” and Five Times Sit to Stand Test in the Community—A Validity Study

1
Assistance Systems and Medical Device Technology, Carl von Ossietzky University Oldenburg, 26129 Oldenburg, Germany
2
Center for Geriatric Medicine, Agaplesion Bethanien Krankenhaus Heidelberg, University Heidelberg, 69117 Heidelberg, Germany
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(10), 2824; https://doi.org/10.3390/s20102824
Received: 6 April 2020 / Revised: 11 May 2020 / Accepted: 12 May 2020 / Published: 15 May 2020
(This article belongs to the Special Issue Sensors for Gait, Human Movement Analysis, and Health Monitoring)
Comprehensive and repetitive assessments are needed to detect physical changes in an older population to prevent functional decline at the earliest possible stage and to initiate preventive interventions. Established instruments like the Timed “Up & Go” (TUG) Test and the Sit-to-Stand Test (SST) require a trained person (e.g., physiotherapist) to assess physical performance. More often, these tests are only applied to a selected group of persons already functionally impaired and not to those who are at potential risk of functional decline. The article introduces the Unsupervised Screening System (USS) for unsupervised self-assessments by older adults and evaluates its validity for the TUG and SST. The USS included ambient and wearable movement sensors to measure the user’s test performance. Sensor datasets of the USS’s light barriers and Inertial Measurement Units (IMU) were analyzed for 91 users aged 73 to 89 years compared to conventional stopwatch measurement. A significant correlation coefficient of 0.89 for the TUG test and of 0.73 for the SST were confirmed among USS’s light barriers. Correspondingly, for the inertial data-based measures, a high and significant correlation of 0.78 for the TUG test and of 0.87 for SST were also found. The USS was a validated and reliable tool to assess TUG and SST. View Full-Text
Keywords: Timed “Up & Go” Test; TUG; Five Times Sit-to-Stand Test; 5xSST; machine learning; assessment; unsupervised; functional; system usability; validity analysis; evaluation; inertial measurement units; technology Timed “Up & Go” Test; TUG; Five Times Sit-to-Stand Test; 5xSST; machine learning; assessment; unsupervised; functional; system usability; validity analysis; evaluation; inertial measurement units; technology
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MDPI and ACS Style

Fudickar, S.; Hellmers, S.; Lau, S.; Diekmann, R.; Bauer, J.M.; Hein, A. Measurement System for Unsupervised Standardized Assessment of Timed “Up & Go” and Five Times Sit to Stand Test in the Community—A Validity Study. Sensors 2020, 20, 2824.

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