Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin

© 2017 Daily living activities are dynamic, requiring spinal motion through space. Current assessment of spinal deformities is based on static measurements from full-spine standing radiographs. Tools to assess dynamic stability during gait might be useful to enhance the standard evaluation. The aim...

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Main Authors: Anne Laure Simon, Vipul Lugade, Kathie Bernhardt, A. Noelle Larson, Kenton Kaufman
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/46390
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-463902018-04-25T07:24:02Z Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin Anne Laure Simon Vipul Lugade Kathie Bernhardt A. Noelle Larson Kenton Kaufman Agricultural and Biological Sciences © 2017 Daily living activities are dynamic, requiring spinal motion through space. Current assessment of spinal deformities is based on static measurements from full-spine standing radiographs. Tools to assess dynamic stability during gait might be useful to enhance the standard evaluation. The aim of this study was to evaluate gait dynamic imbalance in patients with spinal deformity using the dynamic stability margin (DSM). Twelve normal subjects and 17 patients with spinal deformity were prospectively recruited. A kinematic 3D gait analysis was performed for the control group (CG) and the spinal deformity group (SDG). The DSM (distance between the extrapolated center of mass and the base of support) and time-distance parameters were calculated for the right and left side during gait. The relationship between DSM and step length was assessed using three variables: gait stability, symmetry, and consistency. Variables’ accuracy was validated by a discriminant analysis. Patients with spinal deformity exhibited gait instability according to the DSM (0.25 m versus 0.31 m) with decreased velocity (1.1 m s −1 versus 1.3 m s −1 ) and decreased step length (0.32 m versus 0.38 m). According to the discriminant analysis, gait stability was the more accurate variable (area under the curve AUC = 0.98) followed by gait symmetry and consistency. However, gait consistency showed 100% of specificity, sensitivity, and accuracy of precision. The DSM showed that patients with spinal malalignment exhibit decreased gait stability, symmetry, and consistency besides gait time-distance parameter changes. Additional work is required to determine how to apply the DSM for preoperative and postoperative spinal deformity management. 2018-04-25T06:54:16Z 2018-04-25T06:54:16Z 2017-06-01 Journal 18792219 09666362 2-s2.0-85017375419 10.1016/j.gaitpost.2017.03.036 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85017375419&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/46390
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
Anne Laure Simon
Vipul Lugade
Kathie Bernhardt
A. Noelle Larson
Kenton Kaufman
Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin
description © 2017 Daily living activities are dynamic, requiring spinal motion through space. Current assessment of spinal deformities is based on static measurements from full-spine standing radiographs. Tools to assess dynamic stability during gait might be useful to enhance the standard evaluation. The aim of this study was to evaluate gait dynamic imbalance in patients with spinal deformity using the dynamic stability margin (DSM). Twelve normal subjects and 17 patients with spinal deformity were prospectively recruited. A kinematic 3D gait analysis was performed for the control group (CG) and the spinal deformity group (SDG). The DSM (distance between the extrapolated center of mass and the base of support) and time-distance parameters were calculated for the right and left side during gait. The relationship between DSM and step length was assessed using three variables: gait stability, symmetry, and consistency. Variables’ accuracy was validated by a discriminant analysis. Patients with spinal deformity exhibited gait instability according to the DSM (0.25 m versus 0.31 m) with decreased velocity (1.1 m s −1 versus 1.3 m s −1 ) and decreased step length (0.32 m versus 0.38 m). According to the discriminant analysis, gait stability was the more accurate variable (area under the curve AUC = 0.98) followed by gait symmetry and consistency. However, gait consistency showed 100% of specificity, sensitivity, and accuracy of precision. The DSM showed that patients with spinal malalignment exhibit decreased gait stability, symmetry, and consistency besides gait time-distance parameter changes. Additional work is required to determine how to apply the DSM for preoperative and postoperative spinal deformity management.
format Journal
author Anne Laure Simon
Vipul Lugade
Kathie Bernhardt
A. Noelle Larson
Kenton Kaufman
author_facet Anne Laure Simon
Vipul Lugade
Kathie Bernhardt
A. Noelle Larson
Kenton Kaufman
author_sort Anne Laure Simon
title Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin
title_short Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin
title_full Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin
title_fullStr Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin
title_full_unstemmed Assessment of stability during gait in patients with spinal deformity—A preliminary analysis using the dynamic stability margin
title_sort assessment of stability during gait in patients with spinal deformity—a preliminary analysis using the dynamic stability margin
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85017375419&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/46390
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