Coherence and reliability of a wearable inertial measurement unit for measuring postural sway.

Authors:
Eva Ekvall Hansson
Eva Ekvall Hansson
Lund University
Sweden

BMC Res Notes 2019 Apr 2;12(1):201. Epub 2019 Apr 2.

Department of Health Sciences/Physiotherapy, Health Science Centre, Lund University, Box 157, 221 00, Lund, Sweden.

Objective: The aim of this study was to test the coherence of a wearable device, an inertial measurement unit (IMU) against the gold standard; also, to test the intra-trial reliability. This study has a cross-sectional design, where measurement of postural sway in the medio-lateral and anterior-posterior directions was performed simultaneously on a force plate and with a IMU called the Snubblometer ("snubbla" is stumble in Swedish). Thirty-two healthy volunteers participated in the tests.

Results: The coherence between the IMU and the force plate was 0.84 (strong) in the medio-lateral direction with eyes open (EO) and 0.88 (strong) with eyes closed (EC). The ICC for intra-trial reliability for the IMU varied between 0.50 and 0.67 (moderate to good) with a CV between 17.8 and 22.1% and ICC varied between 0.75 and 0.86 (good) for inter-trial reliability, with an SEM of 0.98 to 1.96 mm/s. We have demonstrated that the IMU was both reliable and highly coherent with golden standard, although the two assessment methods were not interchangeable. The ability to move the balance lab out into real life in the form of a wearable device will provide opportunities to perform research that has not been possible before.

Download full-text PDF

Source
http://dx.doi.org/10.1186/s13104-019-4238-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6446366PMC
April 2019
1 Read

Article Mentions


Provided by Crossref Event Data
datacite
Datacite: Datacite
April 3, 2019, 12:34 am EST

Publication Analysis

Top Keywords

force plate
8
wearable device
8
postural sway
8
inertial measurement
8
measurement unit
8
intra-trial reliability
8
imu
5
icc intra-trial
4
178 221%
4
closed icc
4
eyes closed
4
strong eyes
4
reliability imu
4
067 moderate
4
088 strong
4
moderate good
4
good 178
4
varied 050
4
050 067
4
imu varied
4

References

(Supplied by CrossRef)
Article in Prog Brain Res
L Nashner et al.
Prog Brain Res 1988
Article in Ann Fam Med
DM Albertsson et al.
Ann Fam Med 2007
Article in BMC Geriatr
E Ekvall Hansson et al.
BMC Geriatr 2013
Article in Int J Rehabil Res
EE Hansson et al.
Int J Rehabil Res 2008
Article in J Am Geriatr Soc
A Beckman et al.
J Am Geriatr Soc 2011
Article in PLoS ONE
JW Muir et al.
PLoS ONE 2013
Article in Gerontology.
M Piirtola et al.
Gerontology. 2006
Article in J Neurophysiol
C Maurer et al.
J Neurophysiol 2005
Article in Gerontology.
P Era et al.
Gerontology. 2006
Article in Arch Phys Med Rehabil
C Bauer et al.
Arch Phys Med Rehabil 2008
Article in Arch Phys Med Rehabil
PA Goldie et al.
Arch Phys Med Rehabil 1989

Similar Publications