Standing balance post total knee arthroplasty: Sensitivity to change analysis from four to twelve weeks in 466 patients

Summary Objective Little is known about how static standing balance changes post total knee arthroplasty (TKA). The primary aim of this study was to examine the sensitivity to change and redundancy of center of pressure (COP) variables post-TKA. The secondary aim was to compare the sensitivity of th...

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Bibliographic Details
Published in:Osteoarthritis and cartilage 2017-01, Vol.25 (1), p.42-45
Main Authors: Clark, Ross A., Dr, Seah, Felicia Jie-Ting, MS, Chong, Hwei-Chi, BSc, Poon, Cheryl Lian-Li, MS, Tan, John Wei-Ming, BSc, Mentiplay, Benjamin F., BSc(Hons), Pua, Yong-Hao, PhD
Format: Article
Language:English
Subjects:
Aged
Arthroplasty, Replacement, Knee - adverse effects
Female
Gait
Humans
Knee Joint - physiopathology
Locomotion
Male
Postural Balance
Posturography
Recovery of Function
Rehabilitation
Rheumatology
Standing balance
Time Factors
Total knee replacement
Wii Balance Board
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Summary:Summary Objective Little is known about how static standing balance changes post total knee arthroplasty (TKA). The primary aim of this study was to examine the sensitivity to change and redundancy of center of pressure (COP) variables post-TKA. The secondary aim was to compare the sensitivity of these measures to standard clinical assessments of one repetition maximum knee extension strength and fast pace gait speed. Design 466 participants performed instrumented double-limb standing balance tests with eyes open at four and 12 weeks post-TKA. Measures of COP standard deviation, amplitude, root mean square, path length, detrended fluctuation analysis (DFA) and signal frequency content for the medial-lateral (ML) and anterior-posterior (AP) axes were examined. Results Significant decreases in total path length, ML variables related to sway velocity and AP signal complexity and frequency were observed. Inter-session Cohen’s d effect size (ES) revealed the strongest effect was for high velocity ML path length, with a 12% decrease in this rapid sway. This variable, along with AP mean instantaneous frequency and AP DFA, were the only ones significantly different with effect sizes >0.20 and non-redundant (Spearman’s rho
ISSN:1063-4584
1522-9653
DOI:10.1016/j.joca.2016.08.009