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. 2017 Jul 19;19(7):e250. doi: 10.2196/jmir.6360

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©John R Sirard, Brittany Masteller, Patty S Freedson, Albert Mendoza, Amanda Hickey. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 19.07.2017.

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 the Journal of Medical Internet Research, is properly cited. The complete bibliographic information, a link to the original publication on http://www.jmir.org/, as well as this copyright and license information must be included.

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Device output by day. a = Day 4 significantly different from Days 1 and 2 for ActiGraph and Zamzee™ (p <0.04). Note: device output has been scaled to better present all device data in one figure