Thresholds of physical activity associated with obesity by level of sedentary behaviour in children

J-P Chaput, J D Barnes, M S Tremblay, M Fogelholm, G Hu, E V Lambert, C Maher, J Maia, T Olds, V Onywera, O L Sarmiento, M Standage, C Tudor-Locke, P T Katzmarzyk

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Abstract

BACKGROUND: It is unknown whether moderate-to-vigorous physical activity (MVPA) thresholds for obesity should be adapted depending on level of sedentary behaviour in children.

OBJECTIVE: The objective of the study is to determine the MVPA thresholds that best discriminate between obese and non-obese children, by level of screen time and total sedentary time in 12 countries.

METHODS: This multinational, cross-sectional study included 6522 children 9-11 years of age. MVPA and sedentary time were assessed using waist-worn accelerometry, while screen time was self-reported. Obesity was defined according to the World Health Organization reference data.

RESULTS: Receiver operating characteristic curve analyses showed that the best thresholds of MVPA to predict obesity ranged from 53.8 to 73.9 min d-1in boys and from 41.7 to 58.7 min d-1in girls, depending on the level of screen time. The MVPA cut-offs to predict obesity ranged from 37.9 to 75.9 min d-1in boys and from 32.5 to 62.7 min d-1in girls, depending on the level of sedentary behaviour. The areas under the curve ranged from 0.57 to 0.73 ('fail' to 'fair' accuracy), and most sensitivity and specificity values were below 85%, similar to MVPA alone. Country-specific analyses provided similar findings.

CONCLUSIONS: The addition of sedentary behaviour levels to MVPA did not result in a better predictive ability to classify children as obese/non-obese compared with MVPA alone.

Original languageEnglish
Pages (from-to)450-457
Number of pages8
JournalPediatric Obesity
Volume13
Issue number7
Early online date24 Mar 2018
DOIs
Publication statusPublished - 1 Jul 2018

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Child Behavior
Obesity
Exercise
Accelerometry
Aptitude
ROC Curve
Area Under Curve
Cross-Sectional Studies
Sensitivity and Specificity

Keywords

  • Journal Article

Cite this

Chaput, J-P., Barnes, J. D., Tremblay, M. S., Fogelholm, M., Hu, G., Lambert, E. V., ... Katzmarzyk, P. T. (2018). Thresholds of physical activity associated with obesity by level of sedentary behaviour in children. Pediatric Obesity, 13(7), 450-457. https://doi.org/10.1111/ijpo.12276

Thresholds of physical activity associated with obesity by level of sedentary behaviour in children. / Chaput, J-P; Barnes, J D; Tremblay, M S; Fogelholm, M; Hu, G; Lambert, E V; Maher, C; Maia, J; Olds, T; Onywera, V; Sarmiento, O L; Standage, M; Tudor-Locke, C; Katzmarzyk, P T.

In: Pediatric Obesity, Vol. 13, No. 7, 01.07.2018, p. 450-457.

Research output: Contribution to journalArticle

Chaput, J-P, Barnes, JD, Tremblay, MS, Fogelholm, M, Hu, G, Lambert, EV, Maher, C, Maia, J, Olds, T, Onywera, V, Sarmiento, OL, Standage, M, Tudor-Locke, C & Katzmarzyk, PT 2018, 'Thresholds of physical activity associated with obesity by level of sedentary behaviour in children', Pediatric Obesity, vol. 13, no. 7, pp. 450-457. https://doi.org/10.1111/ijpo.12276
Chaput J-P, Barnes JD, Tremblay MS, Fogelholm M, Hu G, Lambert EV et al. Thresholds of physical activity associated with obesity by level of sedentary behaviour in children. Pediatric Obesity. 2018 Jul 1;13(7):450-457. https://doi.org/10.1111/ijpo.12276
Chaput, J-P ; Barnes, J D ; Tremblay, M S ; Fogelholm, M ; Hu, G ; Lambert, E V ; Maher, C ; Maia, J ; Olds, T ; Onywera, V ; Sarmiento, O L ; Standage, M ; Tudor-Locke, C ; Katzmarzyk, P T. / Thresholds of physical activity associated with obesity by level of sedentary behaviour in children. In: Pediatric Obesity. 2018 ; Vol. 13, No. 7. pp. 450-457.
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abstract = "BACKGROUND: It is unknown whether moderate-to-vigorous physical activity (MVPA) thresholds for obesity should be adapted depending on level of sedentary behaviour in children.OBJECTIVE: The objective of the study is to determine the MVPA thresholds that best discriminate between obese and non-obese children, by level of screen time and total sedentary time in 12 countries.METHODS: This multinational, cross-sectional study included 6522 children 9-11 years of age. MVPA and sedentary time were assessed using waist-worn accelerometry, while screen time was self-reported. Obesity was defined according to the World Health Organization reference data.RESULTS: Receiver operating characteristic curve analyses showed that the best thresholds of MVPA to predict obesity ranged from 53.8 to 73.9 min d-1in boys and from 41.7 to 58.7 min d-1in girls, depending on the level of screen time. The MVPA cut-offs to predict obesity ranged from 37.9 to 75.9 min d-1in boys and from 32.5 to 62.7 min d-1in girls, depending on the level of sedentary behaviour. The areas under the curve ranged from 0.57 to 0.73 ('fail' to 'fair' accuracy), and most sensitivity and specificity values were below 85{\%}, similar to MVPA alone. Country-specific analyses provided similar findings.CONCLUSIONS: The addition of sedentary behaviour levels to MVPA did not result in a better predictive ability to classify children as obese/non-obese compared with MVPA alone.",
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AU - Lambert, E V

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AU - Maia, J

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N2 - BACKGROUND: It is unknown whether moderate-to-vigorous physical activity (MVPA) thresholds for obesity should be adapted depending on level of sedentary behaviour in children.OBJECTIVE: The objective of the study is to determine the MVPA thresholds that best discriminate between obese and non-obese children, by level of screen time and total sedentary time in 12 countries.METHODS: This multinational, cross-sectional study included 6522 children 9-11 years of age. MVPA and sedentary time were assessed using waist-worn accelerometry, while screen time was self-reported. Obesity was defined according to the World Health Organization reference data.RESULTS: Receiver operating characteristic curve analyses showed that the best thresholds of MVPA to predict obesity ranged from 53.8 to 73.9 min d-1in boys and from 41.7 to 58.7 min d-1in girls, depending on the level of screen time. The MVPA cut-offs to predict obesity ranged from 37.9 to 75.9 min d-1in boys and from 32.5 to 62.7 min d-1in girls, depending on the level of sedentary behaviour. The areas under the curve ranged from 0.57 to 0.73 ('fail' to 'fair' accuracy), and most sensitivity and specificity values were below 85%, similar to MVPA alone. Country-specific analyses provided similar findings.CONCLUSIONS: The addition of sedentary behaviour levels to MVPA did not result in a better predictive ability to classify children as obese/non-obese compared with MVPA alone.

AB - BACKGROUND: It is unknown whether moderate-to-vigorous physical activity (MVPA) thresholds for obesity should be adapted depending on level of sedentary behaviour in children.OBJECTIVE: The objective of the study is to determine the MVPA thresholds that best discriminate between obese and non-obese children, by level of screen time and total sedentary time in 12 countries.METHODS: This multinational, cross-sectional study included 6522 children 9-11 years of age. MVPA and sedentary time were assessed using waist-worn accelerometry, while screen time was self-reported. Obesity was defined according to the World Health Organization reference data.RESULTS: Receiver operating characteristic curve analyses showed that the best thresholds of MVPA to predict obesity ranged from 53.8 to 73.9 min d-1in boys and from 41.7 to 58.7 min d-1in girls, depending on the level of screen time. The MVPA cut-offs to predict obesity ranged from 37.9 to 75.9 min d-1in boys and from 32.5 to 62.7 min d-1in girls, depending on the level of sedentary behaviour. The areas under the curve ranged from 0.57 to 0.73 ('fail' to 'fair' accuracy), and most sensitivity and specificity values were below 85%, similar to MVPA alone. Country-specific analyses provided similar findings.CONCLUSIONS: The addition of sedentary behaviour levels to MVPA did not result in a better predictive ability to classify children as obese/non-obese compared with MVPA alone.

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