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. 2021 May 12;19:145. doi: 10.1186/s12955-021-01776-y

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© The Author(s) 2021

Open AccessThis 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/. 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 in a credit line to the data.

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Fig. 3 — a Linear or restricted cubic spline plot of the association of moderate or vigorous physical activity (hours per day) with health-related quality of life measured by EQ-VAS, PedsQL physical health summary score, psychosocial health summary score, and total score, stratified by age and sex. b Linear plot of association of screen time for studying, gaming or leisure (hours per day) with health-related quality of life measured by EQ-VAS and PedsQL physical health summary, psychosocial health summary and total scores, stratified by age and sex. c Restricted cubic spline plot of association of sleeping duration (hours per day) with health-related quality of life measured by EQ-VAS and PedsQL physical health summary, psychosocial health summary and total scores, stratified by age and sex.

Fig. 3 — a Linear or restricted cubic spline plot of the association of moderate or vigorous physical activity (hours per day) with health-related quality of life measured by EQ-VAS, PedsQL physical health summary score, psychosocial health summary score, and total score, stratified by age and sex. b Linear plot of association of screen time for studying, gaming or leisure (hours per day) with health-related quality of life measured by EQ-VAS and PedsQL physical health summary, psychosocial health summary and total scores, stratified by age and sex. c Restricted cubic spline plot of association of sleeping duration (hours per day) with health-related quality of life measured by EQ-VAS and PedsQL physical health summary, psychosocial health summary and total scores, stratified by age and sex.