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. 2020 Apr 20;8(4):e14306. doi: 10.2196/14306

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©Athanasios Tsanas, Elizabeth Woodward, Anke Ehlers. Originally published in JMIR mHealth and uHealth (http://mhealth.jmir.org), 20.04.2020.

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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Histogram of the total Pittsburgh Sleep Quality Index scores for the three cohorts in the study. PSQI: Pittsburgh Sleep Quality Index; PTSD: posttraumatic stress disorder.