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. 2019 Sep 25;7(9):e12606. doi: 10.2196/12606

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©Taotao Wang, Mengyuan Ren, Ying Shen, Xiaorou Zhu, Xing Zhang, Min Gao, Xueying Chen, Ai Zhao, Yuhui Shi, Weizhong Chai, Xinchuan Liu, Xinying Sun. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 25.09.2019.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR mhealth and uhealth, is properly cited. The complete bibliographic information, a link to the original publication on http://mhealth.jmir.org/, as well as this copyright and license information must be included.

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Single mediation model, in which app-usage is a three-level categorical predictor (current users=3, past users=2, and non-users=1). Self-efficacy is described by bad mood, support deficiency, and time deficiency; VIPA is vigorous-intensity physical activity and MIPA is moderate-intensity physical activity. (0.000) represents significant path coefficients at the .001 level and (0.01), at the .05 level.