Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE)

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dc.contributor.author Tudor-Locke, Catrine
dc.contributor.author Barreira, Tiago V.
dc.contributor.author Schuna, John M.
dc.contributor.author Mire, Emily F.
dc.contributor.author Chaput, Jean-Philippe
dc.contributor.author Fogelholm, Mikael
dc.contributor.author Hu, Gang
dc.contributor.author Kuriyan, Rebecca
dc.contributor.author Kurpad, Anura
dc.contributor.author Lambert, Estelle V.
dc.contributor.author Maher, Carol
dc.contributor.author Maia, Jose
dc.contributor.author Matsudo, Victor
dc.contributor.author Olds, Tim
dc.contributor.author Onywera, Vincent
dc.contributor.author Sarmiento, Olga L.
dc.contributor.author Standage, Martyn
dc.contributor.author Tremblay, Mark S.
dc.contributor.author Zhao, Pei
dc.contributor.author Church, Timothy S.
dc.contributor.author Katzmarzyk, Peter T.
dc.contributor.author ISCOLE Res Grp
dc.date.accessioned 2019-04-03T10:21:01Z
dc.date.available 2019-04-03T10:21:01Z
dc.date.issued 2015-02-11
dc.identifier.citation Tudor-Locke , C , Barreira , T V , Schuna , J M , Mire , E F , Chaput , J-P , Fogelholm , M , Hu , G , Kuriyan , R , Kurpad , A , Lambert , E V , Maher , C , Maia , J , Matsudo , V , Olds , T , Onywera , V , Sarmiento , O L , Standage , M , Tremblay , M S , Zhao , P , Church , T S , Katzmarzyk , P T & ISCOLE Res Grp 2015 , ' Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) ' , International Journal of Behavioral Nutrition and Physical Activity , vol. 12 , 11 . https://doi.org/10.1186/s12966-015-0172-x
dc.identifier.other PURE: 79048710
dc.identifier.other PURE UUID: abff7ecd-47fa-4cac-bcd5-575d22add20b
dc.identifier.other WOS: 000350325500001
dc.identifier.other Scopus: 84924584808
dc.identifier.uri http://hdl.handle.net/10138/300665
dc.description.abstract Background: We compared 24-hour waist-worn accelerometer wear time characteristics of 9-11 year old children in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) to similarly aged U.S. children providing waking-hours waist-worn accelerometer data in the 2003-2006 National Health and Nutrition Examination Survey (NHANES). Methods: Valid cases were defined as having >= 4 days with >= 10 hours of waking wear time in a 24-hour period, including one weekend day. Previously published algorithms for extracting total sleep episode time from 24-hour accelerometer data and for identifying wear time (in both the 24-hour and waking-hours protocols) were applied. The number of valid days obtained and a ratio (percent) of valid cases to the number of participants originally wearing an accelerometer were computed for both ISCOLE and NHANES. Given the two surveys' discrepant sampling designs, wear time (minutes/day, hours/day) from U.S. ISCOLE was compared to NHANES using a meta-analytic approach. Wear time for the 11 additional countries participating in ISCOLE were graphically compared with NHANES. Results: 491 U.S. ISCOLE children (9.92 +/- 0.03 years of age [M +/- SE]) and 586 NHANES children (10.43 +/- 0.04 years of age) were deemed valid cases. The ratio of valid cases to the number of participants originally wearing an accelerometer was 76.7% in U.S. ISCOLE and 62.6% in NHANES. Wear time averaged 1357.0 +/- 4.2 minutes per 24-hour day in ISCOLE. Waking wear time was 884.4 +/- 2.2 minutes/day for U.S. ISCOLE children and 822.6 +/- 4.3 minutes/day in NHANES children (difference = 61.8 minutes/day, p <0.001). Wear time characteristics were consistently higher in all ISCOLE study sites compared to the NHANES protocol. Conclusions: A 24-hour waist-worn accelerometry protocol implemented in U.S. children produced 22.6 out of 24 hours of possible wear time, and 61.8 more minutes/day of waking wear time than a similarly implemented and processed waking wear time waist-worn accelerometry protocol. Consistent results were obtained internationally. The 24-hour protocol may produce an important increase in wear time compliance that also provides an opportunity to study the total sleep episode time separate and distinct from physical activity and sedentary time detected during waking-hours. en
dc.format.extent 9
dc.language.iso eng
dc.relation.ispartof International Journal of Behavioral Nutrition and Physical Activity
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Accelerometry
dc.subject Measurement
dc.subject Physical activity
dc.subject Exercise
dc.subject Sedentary time
dc.subject PHYSICAL-ACTIVITY
dc.subject ALGORITHMS
dc.subject WRIST
dc.subject HIP
dc.subject 315 Sport and fitness sciences
dc.title Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) en
dc.type Article
dc.contributor.organization University of Helsinki
dc.contributor.organization Department of Food and Nutrition
dc.contributor.organization Nutrition Science
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1186/s12966-015-0172-x
dc.relation.issn 1479-5868
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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