Analysis of multiple waveforms by means of functional principal component analysis: normal versus pathological patterns in sit-to-stand movement
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Otros documentos de la autoría: Epifanio, Irene; Ávila, Carolina; Page del Pozo, Álvaro; Atienza, Carlos
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7037
comunitat-uji-handle3:10234/8635
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Título
Analysis of multiple waveforms by means of functional principal component analysis: normal versus pathological patterns in sit-to-stand movementFecha de publicación
2008Editor
Springer VerlagISSN
01400118Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/acceptedVersionPalabras clave / Materias
Resumen
This paper presents an application of Functional Principal Component Analysis (FPCA) to
describe inter-subject variability of multiple waveforms. This technique was applied to the study
of sit-to-stand movement in ... [+]
This paper presents an application of Functional Principal Component Analysis (FPCA) to
describe inter-subject variability of multiple waveforms. This technique was applied to the study
of sit-to-stand movement in two groups of people, osteoarthritic patients and healthy subjects.
Although STS movement has not been much applied to the study of knee osteoarthritis, it can
provide relevant information about the effect of osteoarthritis disease on knee joint function.
Two waveforms, knee flexion angle and flexion moment, were simultaneously analysed. Instead of
using the common multivariate approach we used the functional one, which allows working with
continuous functions without neither discretization nor time scale normalization.
The results show that time-scale normalization can alter the FPCA solution. Furthermore, FPCA
presents a better discriminatory power compared to the classical multivariate approach. Then, this
technique can be applied as a functional assessment tool, allowing the identification of relevant
variables to discriminate heterogeneous groups, such as healthy and pathological subjects [-]
Derechos de acceso
The original publication is available at www.springerlink.com
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info:eu-repo/semantics/openAccess
http://rightsstatements.org/vocab/InC/1.0/
info:eu-repo/semantics/openAccess
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