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Principal component analysis of stair negotiation and floor transition kinematics in older adults with and without functional disability: cross-sectional study

2025-08-27Research article Open access
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dc.contributor.authorMoreira, Juliana
dc.contributor.authorTeles, Ivone da Silva
dc.contributor.authorCunha, Bruno
dc.contributor.authorFélix, José
dc.contributor.authorGuedes, Diana C.
dc.contributor.authorAlves, Leonel A. T.
dc.contributor.authorSantos, Rubim
dc.contributor.authorSousa, Andreia S P
dc.contributor.authorPinheiro de Sousa, Andreia Sofia
dc.contributor.authorRubim Silva Santos, Manuel
dc.contributor.authorSantos Moreira, Juliana
dc.contributor.authorSousa Félix, José Manuel
dc.date.accessioned2025-11-03T14:05:18Z
dc.date.available2025-11-03T14:05:18Z
dc.date.issued2025-08-27
dc.description.abstractStair negotiation (ascending and descending) and transitions to level walking are complex motor tasks influenced by aging; yet the impact of functional disability on these changes remains underexplored. This study aimed to evaluate the lower limb joint positions, velocities, and the center of mass (CoM) displacement and velocity during stair negotiation and transitions in older adults with and without functional disability. Sixty community-dwelling adults, aged 60 years and older, were assessed for lower limb tridimensional joint positions and velocities during the instances of foot contact or leaving the step and foot contact or leaving the floor; the joint range of motion, angular velocity range, and the CoM displacement and angular velocity range were assessed during stair ascend and descend and transitions floor-to-stair and stair-to-floor through an optoelectronic system. Principal component analysis was used to assess 8 groups of variables to compute principal component models (I-VIII). Participants were classified as with or without disability based on functional disability indicators. Group differences were assessed using the Mann-Whitney U test. From 240 variables, 41 key parameters were identified, mainly related to hip and knee angular velocities in the sagittal plane. Significant differences between older adults with disability (n=25) and without disability (n=35) were found in 12 principal components. Older adults with functional disability showed changes in the sagittal plane hip as well as in the knee angular velocity and mediolateral and vertical CoM displacement and velocity during stair negotiation and transitions. These findings can inform targeted strategies to improve mobility and stability in this population.por
dc.identifier.citationMoreira, J., Teles, I. da S., Cunha, B., Félix, J., Guedes, D. C., Alves, L. A. T., Santos, R., & Sousa, A. S. P. (2025). Principal Component Analysis of Stair Negotiation and Floor Transition Kinematics in Older Adults With and Without Functional Disability: Cross-Sectional Study. JMIR Aging, 8(1), e71530. https://doi.org/10.2196/71530
dc.identifier.doi10.2196/71530
dc.identifier.eissn2561-7605
dc.identifier.urihttp://hdl.handle.net/10400.22/30708
dc.language.isoeng
dc.peerreviewedyes
dc.publisherJMIR Publications
dc.relation2020.05356; UIDB/05210/2020
dc.relation.hasversionhttps://aging.jmir.org/2025/1/e71530
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectDisability
dc.subjectBiomechanics
dc.subjectStair negotiation
dc.subjectGerontology
dc.subjectkinematics
dc.subjectFactor analysis
dc.titlePrincipal component analysis of stair negotiation and floor transition kinematics in older adults with and without functional disability: cross-sectional studypor
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.issue1
oaire.citation.titleJMIR AGING
oaire.citation.volume8
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNamePinheiro de Sousa
person.familyNameRubim Silva Santos
person.familyNameSantos Moreira
person.familyNameSousa Félix
person.givenNameAndreia Sofia
person.givenNameManuel
person.givenNameJuliana
person.givenNameJosé Manuel
person.identifier1070119
person.identifier.ciencia-id2216-9200-7EF6
person.identifier.ciencia-idA018-2B24-C597
person.identifier.ciencia-idF217-BF1E-8507
person.identifier.ciencia-id9211-F885-D21C
person.identifier.orcid0000-0001-9528-1463
person.identifier.orcid0000-0002-7394-7604
person.identifier.orcid0000-0003-0123-4960
person.identifier.orcid0000-0003-4498-573X
person.identifier.ridC-7138-2019
person.identifier.scopus-author-id55950021600
relation.isAuthorOfPublicationaeecfe02-e80d-49ab-9033-a1ade15658f2
relation.isAuthorOfPublication0a264044-a870-4fca-b976-f7ce003d23a8
relation.isAuthorOfPublication574f928e-bf87-4e65-8396-ae884fa7e544
relation.isAuthorOfPublicationb539fe6f-8318-44ab-b42e-d96f6aa69132
relation.isAuthorOfPublication.latestForDiscoveryaeecfe02-e80d-49ab-9033-a1ade15658f2

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