Postural control is one factor related to falls. Many instruments are available to objectively evaluate postural control performance. However, feasibility and applicability is limited by setting and financial restraints. Therefore, the purpose of this study was to assess the concurrent validity between a developed accelerometry-based sway meter and 3D-motion analysis system. Twenty healthy volunteers participated in this study. Postural sway during quiet stance, and leaning (forward, backward, left and right) were collected using a 3D-motion analysis system and the developed accelerometry-based device simultaneously. Pearson’s product correlation coefficient was used to determine the relationship between the two instruments. Significant correlations were found between center of mass sway angle measured by 3D-motion system and the developed sway meter. These findings and the affordable sway meter device may provide support for the use of the accelerometry sway meter in evaluating sway when standing both static and dynamic conditions.
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