Proportion of children meeting recommendations for 24-hour movement guidelines and associations with adiposity in a 12-country study
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Date
2016
Authors
Blanca, Roman-Viñas
Chaput, J-P.
Katzmarzyk, Peter T.
Fogelholm, Mikael
Lambert, Estelle V.
Maher, Carol
Maia, Jose
Olds, Timothy
Onywera, Vincent
Sarmiento, Olga L.
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Abstract
Background: The Canadian 24-h movement guidelines were developed with the hope of improving health and
future health outcomes in children and youth. The purpose of this study was to evaluate adherence to the 3
recommendations most strongly associated with health outcomes in new 24-h movement guidelines and their
relationship with adiposity (obesity and body mass index z-score) across countries participating in the International
Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE).
Methods: Cross-sectional results were based on 6128 children aged 9–11 years from the 12 countries of ISCOLE.
Sleep duration and moderate-to-vigorous physical activity (MVPA) were assessed using accelerometry. Screen time
was measured through self-report. Body weight and height were measured. Body mass index (BMI, kg ·m−2) was
calculated, and BMI z-scores were computed using age- and sex-specific reference data from the World Health
Organization. Obesity was defined as a BMI z-score > +2 SD. Meeting the overall 24-h movement guidelines was
defined as: 9 to 11 h/night of sleep, ≤2 h/day of screen time, and at least 60 min/day of MVPA. Age, sex, highest
parental education and unhealthy diet pattern score were included as covariates in statistical models. Associations
between meeting vs. not meeting each single recommendation (and combinations) with obesity were assessed
with odds ratios calculated using generalized linear mixed models. A linear mixed model was used to examine the
differences in BMI z-scores between children meeting vs. not meeting the different combinations of
recommendations.
Results: The global prevalence of children meeting the overall recommendations (all three behaviors) was 7%, with
children from Australia and Canada showing the highest adherence (15%). Children meeting the three recommendations
had lower odds ratios for obesity compared to those meeting none of the recommendations (OR = 0.28, 95% CI
0.18–0.45). Compared to not meeting the 24-h movement recommendations either independently or combined,
meeting them was significantly associated with a lower BMI z-score. Whenever the MVPA recommendation was
included in the analysis the odds ratios for obesity were lower.
Description
Research paper
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Citation
Roman-Viñas et al. International Journal of Behavioral Nutrition and Physical Activity (2016) 13:123