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dc.contributor.authorSafieddine, Dohaen
dc.contributor.authorChkeir, Alyen
dc.contributor.authorHerlem, Cyrilleen
dc.contributor.authorBera, Delphineen
dc.contributor.authorCollart, Michèleen
dc.contributor.authorNovella, Jean-Lucen
dc.contributor.authorDramé, Moustaphaen
dc.contributor.authorHewson, Daviden
dc.contributor.authorDuchêne, Jacquesen
dc.date.accessioned2017-09-22T10:20:23Z
dc.date.available2017-09-22T10:20:23Z
dc.date.issued2017-09-19
dc.identifier.citationSafieddine D, Chkeir A, Herlem C, Bera D, Collart M, Novella J-L, Dramé M, Hewson DJ, Duchêne J (2017) 'Identification of the period of stability in a balance test after stepping up using a simplified cumulative sum', Medical Engineering and Physics 49 14-21en
dc.identifier.issn1350-4533
dc.identifier.doi10.1016/j.medengphy.2017.07.005
dc.identifier.urihttp://hdl.handle.net/10547/622215
dc.description.abstractFalls are a major cause of death in older people. One method used to predict falls is analysis of Centre of Pressure (CoP) displacement, which provides a measure of balance quality. The Balance Quality Tester (BQT) is a device based on a commercial bathroom scale that calculates instantaneous values of vertical ground reaction force (Fz) as well as the CoP in both anteroposterior (AP) and mediolateral (ML) directions. The entire testing process needs to take no longer than 12 s to ensure subject compliance, making it vital that calculations related to balance are only calculated for the period when the subject is static. In the present study, a method is presented to detect the stabilization period after a subject has stepped onto the BQT. Four different phases of the test are identified (stepping-on, stabilization, balancing, stepping-off), ensuring that subjects are static when parameters from the balancing phase are calculated. The method, based on a simplified cumulative sum (CUSUM) algorithm, could detect the change between unstable and stable stance. The time taken to stabilize significantly affected the static balance variables of surface area and trajectory velocity, and was also related to Timed-up-and-Go performance. Such a finding suggests that the time to stabilize could be a worthwhile parameter to explore as a potential indicator of balance problems and fall risk in older people.
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S135045331730200Xen
dc.rightsGreen - can archive pre-print and post-print or publisher's version/PDF
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectbalanceen
dc.subjectfallsen
dc.subjectfall risken
dc.subjectstabilityen
dc.subjectstabilisationen
dc.subjectchange detectionen
dc.subjectcumulative sumen
dc.titleIdentification of the period of stability in a balance test after stepping up using a simplified cumulative sumen
dc.typeArticleen
dc.identifier.eissn1873-4030
dc.contributor.departmentUniversity of Technology of Troyesen
dc.contributor.departmentLes Arcades Prevention Centreen
dc.contributor.departmentTroyes Hospital Centreen
dc.contributor.departmentReims University Hospitalen
dc.contributor.departmentUniversity of Bedfordshireen
dc.identifier.journalMedical Engineering and Physicsen
dc.date.updated2017-09-22T10:02:08Z
refterms.dateFOA2018-09-19T00:00:00Z
html.description.abstractFalls are a major cause of death in older people. One method used to predict falls is analysis of Centre of Pressure (CoP) displacement, which provides a measure of balance quality. The Balance Quality Tester (BQT) is a device based on a commercial bathroom scale that calculates instantaneous values of vertical ground reaction force (Fz) as well as the CoP in both anteroposterior (AP) and mediolateral (ML) directions. The entire testing process needs to take no longer than 12 s to ensure subject compliance, making it vital that calculations related to balance are only calculated for the period when the subject is static. In the present study, a method is presented to detect the stabilization period after a subject has stepped onto the BQT. Four different phases of the test are identified (stepping-on, stabilization, balancing, stepping-off), ensuring that subjects are static when parameters from the balancing phase are calculated. The method, based on a simplified cumulative sum (CUSUM) algorithm, could detect the change between unstable and stable stance. The time taken to stabilize significantly affected the static balance variables of surface area and trajectory velocity, and was also related to Timed-up-and-Go performance. Such a finding suggests that the time to stabilize could be a worthwhile parameter to explore as a potential indicator of balance problems and fall risk in older people.


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