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. 2020 Dec 7;10:21318. doi: 10.1038/s41598-020-78048-0

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Trend of total physical activity (MET-minutes per week) of adolescents, aged 15–19 years: SuRFNCD 2006–2011. (a) Based on sex strata. P for trend in boys = 0.03; P for trend in girls = 0.02; P-interaction for sex/year = 0.3. (b) Based on residential areas. P-interaction for area/year = 0.25; P for trend in urban = 0.07; P for trend in rural = 0.04. Error bars shows standard error.