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Conference Paper: Assessment of accelerometer non-wear time in children

TitleAssessment of accelerometer non-wear time in children
Authors
Issue Date2014
PublisherInternational Society of Behavioral Nutrition and Physical Activity (ISBNPA).
Citation
The 13th Annual Meeting of the International Society of Behavioral Nutrition and Physical Activity (ISBNPA 2014), San Diego, California, USA, 21-24 May 2014. In the Abstract Book of the Annual Meeting of the International Society of Behavioral Nutrition and Physical Activity, 2014, p. 56, abstract no. S18.3 How to Cite?
AbstractDifferent definitions for determining non-wear time are currently used. The aim of this study was to determine the effect of the definition of ActiGraph and activPAL non-wear time on data retention and the classification of sedentary and sitting time in children. Methods: Accelerometer and inclinometer data were drawn from three studies conducted in Victoria, Australia, using comparable protocols. Boys’ and girls’ (n=626) sedentary time was assessed using ActiGraph accelerometers for 8 consecutive days. Sitting time was also assessed using activPAL inclinometers. Four definitions were applied to identify non-wear time: 10, 20, 30 and 60 minutes of consecutive zeros. Descriptive analyses were initially conducted to examine the effects on sample size retention, wear time, and sedentary or sitting time estimates. Univariate ANOVAs were used to determine whether significant differences were apparent in sedentary or sitting time estimates depending on non-wear definitions. Results: Using the 10 minute non-wear definition, fewer children were retained compared to the 60 minute definition for both the ActiGraph (487 vs. 509 children) and the activPAL (379 vs. 416 children). Increasing wear time, sedentary time and sitting time were observed with increasing non-wear definitions; significant differences were apparent between all definitions except between the 20 and 30 minute definition. Conclusions: Non-wear definitions had a significant impact sample retention, wear time and average daily sedentary time. Researchers should be aware of the influence of non-wear criteria on sedentary and sitting time estimates. Future studies are needed to validate non-wear time definitions in children.
DescriptionSymposia: S18
The Abstract Book can be viewed at: http://isbnpa2014.org/2014%20ABSTRACTS.pdf
Persistent Identifierhttp://hdl.handle.net/10722/206113

 

DC FieldValueLanguage
dc.contributor.authorRidgers, Nen_US
dc.contributor.authorHesketh, Ken_US
dc.contributor.authorArundell, Len_US
dc.contributor.authorTimperio, Aen_US
dc.contributor.authorHinkley, Ten_US
dc.contributor.authorChin A Paw, Men_US
dc.contributor.authorCerin, Een_US
dc.contributor.authorSalmon, Jen_US
dc.date.accessioned2014-10-20T12:29:02Z-
dc.date.available2014-10-20T12:29:02Z-
dc.date.issued2014en_US
dc.identifier.citationThe 13th Annual Meeting of the International Society of Behavioral Nutrition and Physical Activity (ISBNPA 2014), San Diego, California, USA, 21-24 May 2014. In the Abstract Book of the Annual Meeting of the International Society of Behavioral Nutrition and Physical Activity, 2014, p. 56, abstract no. S18.3en_US
dc.identifier.urihttp://hdl.handle.net/10722/206113-
dc.descriptionSymposia: S18-
dc.descriptionThe Abstract Book can be viewed at: http://isbnpa2014.org/2014%20ABSTRACTS.pdf-
dc.description.abstractDifferent definitions for determining non-wear time are currently used. The aim of this study was to determine the effect of the definition of ActiGraph and activPAL non-wear time on data retention and the classification of sedentary and sitting time in children. Methods: Accelerometer and inclinometer data were drawn from three studies conducted in Victoria, Australia, using comparable protocols. Boys’ and girls’ (n=626) sedentary time was assessed using ActiGraph accelerometers for 8 consecutive days. Sitting time was also assessed using activPAL inclinometers. Four definitions were applied to identify non-wear time: 10, 20, 30 and 60 minutes of consecutive zeros. Descriptive analyses were initially conducted to examine the effects on sample size retention, wear time, and sedentary or sitting time estimates. Univariate ANOVAs were used to determine whether significant differences were apparent in sedentary or sitting time estimates depending on non-wear definitions. Results: Using the 10 minute non-wear definition, fewer children were retained compared to the 60 minute definition for both the ActiGraph (487 vs. 509 children) and the activPAL (379 vs. 416 children). Increasing wear time, sedentary time and sitting time were observed with increasing non-wear definitions; significant differences were apparent between all definitions except between the 20 and 30 minute definition. Conclusions: Non-wear definitions had a significant impact sample retention, wear time and average daily sedentary time. Researchers should be aware of the influence of non-wear criteria on sedentary and sitting time estimates. Future studies are needed to validate non-wear time definitions in children.-
dc.languageengen_US
dc.publisherInternational Society of Behavioral Nutrition and Physical Activity (ISBNPA).-
dc.relation.ispartofAnnual Meeting of the International Society of Behavioral Nutrition and Physical Activity (ISBNPA)en_US
dc.titleAssessment of accelerometer non-wear time in childrenen_US
dc.typeConference_Paperen_US
dc.identifier.emailCerin, E: ecerin@hku.hken_US
dc.identifier.authorityCerin, E=rp00890en_US
dc.identifier.hkuros240746en_US
dc.identifier.spage56, abstract no. S18.3-
dc.identifier.epage56, abstract no. S18.3-

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