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. 2017 Oct 27;5(10):e166. doi: 10.2196/mhealth.8656

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©Gautam Adusumilli, Solomon Eben Joseph, Michael A Samaan, Brooke Schultz, Tijana Popovic, Richard B Souza, Sharmila Majumdar. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 27.10.2017.

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 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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A Bland-Altman plot of differences between app-derived test duration and stopwatch time during the Stair Climb Test. Line of mean difference is at -1.71 and upper and lower limits of 95% agreement are at 1.00 and -4.42, respectively.