title: Assessment of differenced center of pressure time series improves detection of age-related changes in postural coordination.
abstract: Center of Pressure (CoP) time series exhibit non-stationarity. Most CoP analyses assume a stationary signal, which could lead to measurement inaccuracy. Despite this, few researchers have reported the incidence of CoP non-stationarity or employed procedures to mitigate non-stationarity prior to time-series analysis. Differencing is a pre-processing technique that reduces non-stationarity, though it has only recently been used with CoP data. This study sought to report the incidence of CoP non-stationarity in a sample data set and determine whether differencing mitigated any CoP non-stationarity that was detected. In addition, researchers examined whether analysis of differenced CoP improved the ability to detect age-related changes in postural coordination.
authors.affiliation: adam.strang.ctr@us.af.mil
authors.forename: Adam J
authors.initials: AJ
authors.lastname: Strang
authors.forename: Angela
authors.initials: A
authors.lastname: DiDomenico
authors.forename: William P
authors.initials: WP
authors.lastname: Berg
authors.forename: Raymond W
authors.initials: RW
authors.lastname: McGorry
mesh_terms: D000328:Adult; D000375:Aging / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D004856:Postural Balance / Q000502:physiology*; D011312:Pressure; D015203:Reproducibility of Results; D055815:Young Adult