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A low-cost 2-D video system can accurately and reliably assess adaptive gait kinematics in healthy and low vision subjects

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posted on 2023-07-26, 14:49 authored by Tjerk Zult, Jonathan E. Allsop, Juan Tabernero, Shahina Pardhan
3-D gait analysis is the gold standard but many healthcare clinics and research institutes would benefit from a system that is inexpensive and simple but just as accurate. The present study examines whether a low-cost 2-D motion capture system can accurately and reliably assess adaptive gait kinematics in subjects with central vision loss, older controls, and younger controls. Subjects were requested to walk up and step over a 10 cm high obstacle that was positioned in the middle of a 4.5 m walkway. Four trials were simultaneously recorded with the Vicon motion capture system (3-D system) and a video camera that was positioned perpendicular to the obstacle (2-D system). The kinematic parameters (crossing height, crossing velocity, foot placement, single support time) were calculated offline. Strong Pearson's correlations were found between the two systems for all parameters (average r = 0.944, all p < 0.001). Bland-Altman analysis showed that the agreement between the two systems was good in all three groups after correcting for systematic biases related to the 2-D marker positions. The test-retest reliability for both systems was high (average ICC = 0.959). These results show that a low-cost 2-D video system can reliably and accurately assess adaptive gait kinematics in healthy and low vision subjects.

History

Refereed

  • Yes

Volume

9

Page range

18385

Publication title

Scientific Reports

ISSN

2045-2322

Publisher

Nature Research

File version

  • Published version

Language

  • eng

Legacy posted date

2019-12-09

Legacy creation date

2019-12-09

Legacy Faculty/School/Department

Faculty of Health, Education, Medicine & Social Care

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