title: Within trial validation and reliability of a single tri-axial accelerometer for gait assessment.
abstract: Gait is a sensitive biomarker of decline in both cognitive and physical function. Therefore, the collection of gait data is an important feature of clinical assessments. Accelerometer-based body worn sensors are quickly becoming the preferred tool for assessing gait because they are small, useable in a wide variety of settings, offer more continuous spatio-temporal analysis and are inexpensive when compared with traditional gait assessment methodologies. The purpose of this study was to determine the validity and within test reliability of a low cost body worn movement sensor with associated algorithms to assess gait in a large group of older and younger healthy adults. We collected gait data over intermittent walks on an instrumented walkway for a within trial validation and also used the same accelerometer derived gait data for a within test reliability analysis. ICCs for validation and reliability were >0.756 and >0.965, respectively.
authors.forename: Alan
authors.initials: A
authors.lastname: Godfrey
authors.forename: Silvia
authors.initials: S
authors.lastname: Del Din
authors.forename: Gillian
authors.initials: G
authors.lastname: Barry
authors.forename: John C
authors.initials: JC
authors.lastname: Mathers
authors.forename: Lynn
authors.initials: L
authors.lastname: Rochester
mesh_terms: D061725:Accelerometry / Q000295:instrumentation*; D000328:Adult; D000368:Aged; D000465:Algorithms; D005260:Female; D005684:Gait; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D062211:Spatio-Temporal Analysis