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

Peter T Katzmarzyk³  Timothy S Church³  Pei Zhao^1,12  Mark S Tremblay^1,10  Martyn Standage¹  Olga L Sarmiento^1,13  Vincent Onywera⁷  Tim Olds⁹  Victor Matsudo^1,11  José Maia²  Carol Maher⁹  Estelle V Lambert⁶  Anura Kurpad⁴  Rebecca Kuriyan⁴  Gang Hu³  Mikael Fogelholm⁸  Jean-Philippe Chaput^1,10  Emily F Mire³  John M Schuna⁵  Tiago V Barreira^1,14  Catrine Tudor-Locke³ 

[1] University of Bath, Bath, UK;CIFI2D, Faculdade de Desporto, University of Porto, Porto, Portugal;Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge 70808, LA, USA;St. Johns Research Institute, Bangalore, India;Oregon State University, Corvallis, USA;University of Cape Town, Cape Town, South Africa;Kenyatta University, Nairobi, Kenya;University of Helsinki, Helsinki, Finland;University of South Australia, Adelaide, Australia;Children’s Hospital of Eastern Ontario Research Institute, Ottawa, Canada;Center of Studies of the Physical Fitness Research Laboratory from Sao Caetano do Sul (CELAFISCS), Sao Paulo, Brazil;Tianjin Women’s and Children’s Health Center, Tianjin, China;School of Medicine, Universidad de los Andes, Bogota, Colombia;Syracuse University, Syracuse, USA

关键词: Sedentary time;    Exercise;    Physical activity;    Measurement;    Accelerometry;   

Others  :  1136034
DOI  :  10.1186/s12966-015-0172-x

 received in 2014-08-25, accepted in 2015-01-26,  发布年份 2015

【 摘 要 】

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.

Trial registration

ClinicalTrials.gov NCT01722500 webcite.

【 授权许可】

   
2015 Tudor-Locke et al.; licensee BioMed Central.

【 图 表 】

Figure 1.

Figure 2.

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