Show simple item record

dc.contributor.authorZhou, S-Men
dc.contributor.authorHill, RAen
dc.contributor.authorMorgan, Ken
dc.contributor.authorStratton, Gen
dc.contributor.authorGravenor, MBen
dc.contributor.authorBijlsma, Gen
dc.contributor.authorBrophy, Sen
dc.date.accessioned2021-02-04T22:22:28Z
dc.date.available2021-02-04T22:22:28Z
dc.date.issued2015-05-11en
dc.identifier.urihttp://hdl.handle.net/10026.1/16854
dc.description.abstract

OBJECTIVE: To classify wear and non-wear time of accelerometer data for accurately quantifying physical activity in public health or population level research. DESIGN: A bi-moving-window-based approach was used to combine acceleration and skin temperature data to identify wear and non-wear time events in triaxial accelerometer data that monitor physical activity. SETTING: Local residents in Swansea, Wales, UK. PARTICIPANTS: 50 participants aged under 16 years (n=23) and over 17 years (n=27) were recruited in two phases: phase 1: design of the wear/non-wear algorithm (n=20) and phase 2: validation of the algorithm (n=30). METHODS: Participants wore a triaxial accelerometer (GeneActiv) against the skin surface on the wrist (adults) or ankle (children). Participants kept a diary to record the timings of wear and non-wear and were asked to ensure that events of wear/non-wear last for a minimum of 15 min. RESULTS: The overall sensitivity of the proposed method was 0.94 (95% CI 0.90 to 0.98) and specificity 0.91 (95% CI 0.88 to 0.94). It performed equally well for children compared with adults, and females compared with males. Using surface skin temperature data in combination with acceleration data significantly improved the classification of wear/non-wear time when compared with methods that used acceleration data only (p<0.01). CONCLUSIONS: Using either accelerometer seismic information or temperature information alone is prone to considerable error. Combining both sources of data can give accurate estimates of non-wear periods thus giving better classification of sedentary behaviour. This method can be used in population studies of physical activity in free-living environments.

en
dc.format.extente007447 - ?en
dc.languageengen
dc.language.isoengen
dc.rightsAttribution-NonCommercial 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/en
dc.subjectPUBLIC HEALTHen
dc.subjectaccelerometeren
dc.subjectclassificationen
dc.subjectnon-wearen
dc.subjectphysical activityen
dc.subjectsedentary behaviouren
dc.subjectAccelerationen
dc.subjectAccelerometryen
dc.subjectAdolescenten
dc.subjectAdulten
dc.subjectAlgorithmsen
dc.subjectAnkleen
dc.subjectBody Temperatureen
dc.subjectChilden
dc.subjectExerciseen
dc.subjectFemaleen
dc.subjectHumansen
dc.subjectMaleen
dc.subjectMonitoring, Ambulatoryen
dc.subjectMotor Activityen
dc.subjectSedentary Behavioren
dc.subjectSkinen
dc.subjectWalesen
dc.subjectWristen
dc.subjectYoung Adulten
dc.titleClassification of accelerometer wear and non-wear events in seconds for monitoring free-living physical activity.en
dc.typeJournal Article
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/25968000en
plymouth.issue5en
plymouth.volume5en
plymouth.publication-statusPublished onlineen
plymouth.journalBMJ Openen
dc.identifier.doi10.1136/bmjopen-2014-007447en
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Health
plymouth.organisational-group/Plymouth/Faculty of Health/School of Nursing and Midwifery
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.publisher.placeEnglanden
dc.identifier.eissn2044-6055en
dc.rights.embargoperiodNot knownen
rioxxterms.versionofrecord10.1136/bmjopen-2014-007447en
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by-nc/4.0/en
rioxxterms.typeJournal Article/Reviewen


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial 4.0 International
Except where otherwise noted, this item's license is described as Attribution-NonCommercial 4.0 International

All items in PEARL are protected by copyright law.
Author manuscripts deposited to comply with open access mandates are made available in accordance with publisher policies. Please cite only the published version using the details provided on the item record or document. In the absence of an open licence (e.g. Creative Commons), permissions for further reuse of content should be sought from the publisher or author.
Theme by 
@mire NV