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. 2024 Nov 1;178(11):1199-1207.
doi: 10.1001/jamapediatrics.2024.3330.

Pooled Analysis of Physical Activity, Sedentary Behavior, and Sleep Among Children From 33 Countries

Affiliations

Pooled Analysis of Physical Activity, Sedentary Behavior, and Sleep Among Children From 33 Countries

Kar Hau Chong et al. JAMA Pediatr. .

Abstract

Importance: The prevalence estimates of physical activity, sedentary behavior, and sleep (collectively known as movement behaviors) in 3- and 4-year-old children worldwide remains uncertain.

Objective: To report the proportion of 3- and 4-year-old children who met the World Health Organization guidelines for physical activity, sedentary behavior, and sleep across 33 countries.

Design, setting, and participants: Pooled analysis of data from 14 cross-sectional studies (July 2008 to September 2022) identified through systematic reviews and personal networks. Thirty-three countries of varying income levels across 6 geographical regions. Each study site needed to have at least 40 children aged 3.0 to 4.9 years with valid accelerometry and parent-/caregiver-reported screen time and sleep duration data. Data were analyzed from October 2022 to February 2023.

Exposures: Time spent in physical activity was assessed by reanalyzing accelerometry data using a harmonized data-processing protocol. Screen time and sleep duration were proxy reported by parents or caregivers.

Main outcomes and measures: The proportion of children who met the World Health Organization guidelines for physical activity (≥180 min/d of total physical activity and ≥60 min/d of moderate- to vigorous-intensity physical activity), screen time (≤1 h/d), and sleep duration (10-13 h/d) was estimated across countries and by World Bank income group and geographical region using meta-analysis.

Results: Of the 7017 children (mean [SD] age, 4.1 [0.5] years; 3585 [51.1%] boys and 3432 [48.9%] girls) in this pooled analysis, 14.3% (95% CI, 9.7-20.7) met the overall guidelines for physical activity, screen time, and sleep duration. There was no clear pattern according to income group: the proportion meeting the guidelines was 16.6% (95% CI, 10.4-25.3) in low- and lower-middle-income countries, 11.9% (95% CI, 5.9-22.5) in upper-middle-income countries, and 14.4% (95% CI, 9.6-21.1) in high-income countries. The region with the highest proportion meeting the guidelines was Africa (23.9%; 95% CI, 11.6-43.0), while the lowest proportion was in North and South America (7.7%; 95% CI, 3.6-15.8).

Conclusions and relevance: Most 3- and 4-year-old children in this pooled analysis did not meet the current World Health Organization guidelines for physical activity, sedentary behavior, and sleep. Priority must be given to understanding factors that influence these behaviors in this age group and to implementing contextually appropriate programs and policies proven to be effective in promoting healthy levels of movement behaviors.

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Conflict of interest statement

Conflict of Interest Disclosures: Dr Christian reported grants from Telethon Kids Institute, University of Western Australia Western Australian Health Promotion Foundation (Healthway), Telethon Kids Institute, University of Western Australia Australian National Health & Medical Research Council (NHMRC), and Telethon Kids Institute, University of Western Australia Australian Research Council (ARC) during the conduct of the study and a National Heart Foundation Future Leader Fellowship outside the submitted work. Dr Cliff reported grants from Australian Research Council during the conduct of the study. Dr De Craemer reported grants from Seventh Framework Programme during the conduct of the study. Dr El Hamdouchi reported grants from Physical Activity Pioneers to fund the SUNRISE pilot study during the conduct of the study. Dr Kontsevaya reported grants from the World Health Organization during the conduct of the study. Dr Meredith-Jones reported grants from Health Research Council New Zealand during the conduct of the study. Dr Tanaka reported grants from Sasakawa Sports Foundation during the conduct of the study. Dr Taylor reported grants from Health Research Council of New Zealand during the conduct of the study. Dr Tremblay reported grants from Canadian Institutes of Health Research during the conduct of the study. No other disclosures were reported.

Figures

Figure 1.
Figure 1.. Accelerometry Data Processing and Analysis Procedures
MVPA indicates moderate- to vigorous-intensity physical activity; PA, physical activity; TPA, total physical activity.
Figure 2.
Figure 2.. Proportion of Children Meeting the World Health Organization Guidelines, Overall and by Income Group and Region

References

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