TY - JOUR
T1 - Improving wear time compliance with a 24-hour waist-worn accelerometer protocol in the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE)
AU - ISCOLE Research Group
AU - Tudor-Locke, Catrine
AU - Barreira, Tiago V.
AU - Schuna, John M.
AU - Mire, Emily F.
AU - Chaput, Jean Philippe
AU - Fogelholm, Mikael
AU - Hu, Gang
AU - Kuriyan, Rebecca
AU - Kurpad, Anura
AU - Lambert, Estelle V.
AU - Maher, Carol
AU - Maia, José
AU - Matsudo, Victor
AU - Olds, Tim
AU - Onywera, Vincent
AU - Sarmiento, Olga L.
AU - Standage, Martyn
AU - Tremblay, Mark S.
AU - Zhao, Pei
AU - Church, Timothy S.
AU - Katzmarzyk, Peter T.
AU - Lambert, Denise G.
AU - Barreira, Tiago
AU - Broyles, Stephanie
AU - Butitta, Ben
AU - Champagne, Catherine
AU - Cocreham, Shannon
AU - Dentro, Kara
AU - Drazba, Katy
AU - Harrington, Deirdre
AU - Johnson, William
AU - Milauskas, Dione
AU - Mire, Emily
AU - Tohme, Allison
AU - Rodarte, Ruben
AU - Amoroso, Bobby
AU - Luopa, John
AU - Neiberg, Rebecca
AU - Rushing, Scott
AU - Lewis, Lucy
AU - Ferrar, Katia
AU - Physio, B.
AU - Georgiadis, Effie
AU - Stanley, Rebecca
AU - Matsudo, Victor Keihan Rodrigues
AU - Matsudo, Sandra
AU - Araujo, Timoteo
AU - de Oliveira, Luis Carlos
AU - Rezende, Leandro
AU - Fabiano, Luis
N1 - Funding Information:
ISCOLE is funded by The Coca-Cola Company. The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Publisher Copyright:
© 2015 Tudor-Locke et al..
PY - 2015/2/11
Y1 - 2015/2/11
N2 - 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.
AB - 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.
KW - Accelerometry
KW - Exercise
KW - Measurement
KW - Physical activity
KW - Sedentary time
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U2 - 10.1186/s12966-015-0172-x
DO - 10.1186/s12966-015-0172-x
M3 - Article
C2 - 25881074
AN - SCOPUS:84924584808
VL - 12
JO - International Journal of Behavioral Nutrition and Physical Activity
JF - International Journal of Behavioral Nutrition and Physical Activity
SN - 1479-5868
IS - 1
M1 - 11
ER -