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. 2021 Apr 15;9(4):e25385. doi: 10.2196/25385

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©Douae El Fatouhi, Lidia Delrieu, Catherine Goetzinger, Laurent Malisoux, Aurélie Affret, David Campo, Guy Fagherazzi. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 15.04.2021.

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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Follow-up and inclusion criteria of the study (N=26,935). (a) Step per day measurements were obtained through the Withings Pulse activity tracker. (b) Weight was assessed by users on their Withings weight scale. M1: first 30-day period of activity tracker use; M6: sixth 30-day period of activity tracker use.