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Citation
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Taglietti M, Dela Bela LF, Dias JM, Marcondes Pelegrinelli AR, Nogueira JF, Batista Júnior JP, da Silva Carvalho RG, McVeigh JG, Facci LM, Moura FA, Cardoso JR. PM R 2016; 9(8): 774-780. |
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Affiliation
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Laboratory of Biomechanics and Clinical Epidemiology, PAIFIT Research Group, Universidade Estadual de Londrina, Londrina, PR, Brazil. Electronic address: jeffcar@uel.br. |
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Abstract
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BACKGROUND: Osteoarthritis (OA) is a chronic degenerative disease that commonly affects the knee joints. Individuals over 65 years with knee OA have a greater risk of falls. However, there has be limited examination of the parameters of postural sway (increased time, speed and postural sway area (center of pressure area (CoP)), and OA of the knee.
OBJECTIVES: Primary: to determine whether the CoP variables discriminate between patients with knee OA and matched healthy volunteers, and to correlate the CoP variables with the Activities-Specific Balance Confidence Scale (ABC) and Falls Self-Efficacy Scale (FES); Secondary: to compare the CoP of the older women with OA with a control group in bipedal support condition with eyes opened and closed.
DESIGN: Cross-sectional study. SETTING: University Biomechanics Laboratory. PARTICIPANTS: Twenty-two participants were divided into two groups of 11: OA group (x¯=68 years (SD=7.4) and a control group (x¯=66 years (SD=4.4).
METHODS: Static postural balance was measured by a portable force platform. Data were collected in both visual conditions (eyes open and closed), in a random order. Three attempts of 30 seconds were allowed for each participant on the force platform, with a one minute interval between attempts. MAIN OUTCOME MEASURE: Variables the CoP: total displacement of sway (TDS, in cm), anteroposterior amplitude displacement (APAD, in cm), medial-lateral amplitude displacement (MLAD, in cm), total mean velocity (TMV, in cm/s) and dispersion of the center of pressure (AREA, in cm(2)).
RESULTS: The postural sway analysis found statistically significant differences in the eyes open condition for the TDS (p=.020), APAD (p=.042), TMV (p=.010), and AREA (p=.045). In the discriminant analysis none of CoP variables were able to classify the groups (p=.15). The correlation analysis showed only the AREA with eyes closed was associated with the ABC Scale (rho=-0.42).
CONCLUSIONS: Women with knee OA had greater postural sway when compared to a control group for the eyes open condition. CoP variables could not discriminate between the groups. The AREA (dispersion of the center of pressure) was negatively correlated with the ABC Scale, when the eyes were closed.
Copyright © 2016 American Academy of Physical Medicine and Rehabilitation. Published by Elsevier Inc. All rights reserved.
Language: en |