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. 2020 Aug 5;8(8):e18370. doi: 10.2196/18370

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©Jiaxing Liu, Yang Zhao, Boya Lai, Hailiang Wang, Kwok Leung Tsui. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 05.08.2020.

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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Boxplot of estimated daily total sleep time during bedtime at night from our approach and Fitbit’s approach for all participants. HMM: hidden Markov model; TST: total sleep time.