Assessment of postural sway using smartphone technologies: Comparison with force plate measures

Background: Assessment of postural sway is an important functional outcome. However, in clinical settings, assessment of postural sway is often subjective, and reliant on observer experience. Recent innovations in smartphone technology allows clinicians to use mobile applications to objectively assess postural sway using convenient low cost methods. The SWAY Balance Application (SWAY) is one example which provides scores ranging from 0 to 100 (higher scores indicating better balance). Previous validations of SWAY utilised only anterior-posterior accelerations; however, validation of the current version of SWAY, which utilises all three axes of the device's accelerometer are lacking cont.