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research article

iTUG, a Sensitive and Reliable Measure of Mobility

Salarian, A.  
•
Horak, F.
•
Zampieri, C.
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2010
IEEE Transactions on Neural Systems & Rehabilitation Engineering

Timed Up and Go (TUG) test is a widely used clinical paradigm to evaluate balance and mobility. Although TUG includes several complex subcomponents, namely: sit-to-stand, gait, 180 degrees turn, and turn-to-sit; the only outcome is the total time to perform the task. We have proposed an instrumented TUG, called iTUG, using portable inertial sensors to improve TUG in several ways: automatic detection and separation of subcomponents, detailed analysis of each one of them and a higher sensitivity than TUG. Twelve subjects in early stages of Parkinson's disease (PD) and 12 age matched control subjects were enrolled. Stopwatch measurements did not show a significant difference between the two groups. The iTUG, however, showed a significant difference in cadence between early PD and control subjects (111.1 +/- 6.2 versus 120.4 +/- 7.6 step/min, p < 0.006) as well as in angular velocity of arm-swing (123 +/- 32.0 versus 174.0 +/- 50.4 degrees/s, p < 0.005), turning duration (2.18 +/- 0.43 versus 1.79 +/- 0.27 s, p < 0.023), and time to perform turn-to-sits (2.96 +/- 0.68 versus 2.40 +/- 0.33 s, p < 0.023). By repeating the tests for a second time, the test-retest reliability of iTUG was also evaluated. Among the subcomponents of iTUG, gait, turning, and turn-to-sit were the most reliable and sit-to-stand was the least reliable.

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Type
research article
DOI
10.1109/TNSRE.2010.2047606
Web of Science ID

WOS:000281782000010

Author(s)
Salarian, A.  
Horak, F.
Zampieri, C.
Carlson-Kuhta, P.
Nutt, J.
Aminian, K.  
Date Issued

2010

Publisher

Institute of Electrical and Electronics Engineers

Published in
IEEE Transactions on Neural Systems & Rehabilitation Engineering
Volume

18

Start page

303

End page

310

Subjects

Balance

•

gait

•

mobility

•

objective assessment

•

wearable sensors

•

Parkinsons-Disease

•

Go Test

•

Ambulatory System

•

Older-People

•

Elderly Persons

•

Get-Up

•

Gait

•

Balance

•

Stand

•

Falls

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

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LMAM  
Available on Infoscience
January 27, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/46244
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