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. 2015 Sep 17;12:113. doi: 10.1186/s12966-015-0274-5

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© Cooper et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 5 — Comparison between selected countries of the relative effect of sex, age and weight status. a Difference in physical activity by sex in selected countries at ages 9–10 and 12–13. b Longitudinal change in physical activity per year of increasing age. c Difference in physical activity associated with higher BMI in selected countries at ages 9–10 and 12–13. SD = standard deviation. Forest plots display random-effects meta-analysis. The estimates for each country were calculated from regression models adjusted for age, sex and season, fitted to each country in turn