Publication: Reliability of a low-cost webcam recording system for three-dimensional lower limb gait analysis
Issued Date
2019-01-01
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ISSN
23335432
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2-s2.0-85073204893
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Mahidol University
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SCOPUS
Bibliographic Citation
International Biomechanics. Vol.6, No.1 (2019), 85-92
Suggested Citation
Apiwan Pusara, Sumet Heamawatanachai, Komsak Sinsurin, Chaiyong Jorrakate Reliability of a low-cost webcam recording system for three-dimensional lower limb gait analysis. International Biomechanics. Vol.6, No.1 (2019), 85-92. doi:10.1080/23335432.2019.1671221 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/50685
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Title
Reliability of a low-cost webcam recording system for three-dimensional lower limb gait analysis
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Abstract
© 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. The purposes of this study were to develop and evaluate the test-retest reliability of a specific low-cost three-dimensional webcam recording system (3D-WCRS) and compare its reliability to a standard motion analysis system. Twenty healthy volunteers comprised of 5 males and 15 females with a mean age of 22.90 years and mean BMI of 22.72 kg/m2 were investigated for angles of hip, knee and ankle joints in three planes while walking at a self-selected speed. Intraclass correlation coefficients (ICCs) were used to evaluate as well as compare the test-retest reliability of the 3D-WCRS and standard motion analysis system. Standard error of measurement (SEM) was also analyzed for the purposes of the study. The results exhibited excellent test-retest reliability for the 3D-WCRS (ICCs ranged between 0.93 and 0.99, p = 0.001) in the three joints and planes. The standard motion analysis system demonstrated excellent reliability for all joints and planes (ICCs ranged between 0.99 and 1.00, p = 0.001). Minimal SEM values were observed in both the 3D-WCRS and standard motion analysis systems. Therefore, the developed low-cost 3D-WCRS exhibits good to excellent test-retest reliability. The test-retest reliability of the 3D-WCRS is likely to be comparable to a standard motion analysis system.