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Using effect size to quantify plantar pressure asymmetry of gait of nondisabled adults and patients with hemiparesis

François J. Potdevin, MD, et al.

Figure. Sensor distribution with Parotec insoles (Paromed GmbH, D-8201, Markt Neubeuern, Germany).

Asymmetry quantification is necessary for detecting limits between normality and abnormality for diagnosing pathological walking pattern or guiding rehabilitation processes. The present study tested the effect size (ES) method as a mean of quantifying the asymmetry in disabled and nondisabled populations. The peaks of plantar pressure on eight footprint locations of 27 nondisabled subjects and 18 patients with hemiparesis were bilaterally compared. The results show an advantage in using the ES procedure to quantify asymmetry, when confidence limits are performed in addition. Conversely, traditional asymmetry indexes immediately implied asymmetry without statistical basis. Further studies on asymmetry of gait using ES analysis are needed to shed further light on significant bilateral differences. Our findings should be considered when clinicians attempt to diagnose pathological walking patterns or guide rehabilitation processes.


Volume 44 Number 3 2007
Pages 347 — 354


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