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. 2018 Dec 21;6(12):e200. doi: 10.2196/mhealth.9774

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©Matthias Loeckx, Roberto A Rabinovich, Heleen Demeyer, Zafeiris Louvaris, Rebecca Tanner, Noah Rubio, Anja Frei, Corina De Jong, Elena Gimeno-Santos, Fernanda M Rodrigues, Sara C Buttery, Nicholas S Hopkinson, Gilbert Büsching, Alexandra Strassmann, Ignasi Serra, Ioannis Vogiatzis, Judith Garcia-Aymerich, Michael I Polkey, Thierry Troosters. Originally published in JMIR Mhealth and Uhealth (http://mhealth.jmir.org), 21.12.2018.

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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Change in physical activity (PA; mean [SE]) across groups of patients according to total contact time; adjusted for age, baseline functional exercise capacity, baseline forced expiratory volume in 1 second, baseline symptom score and number of acute exacerbations in the previous 12 months. P value (P for trend) indicates difference in intervention effect between patients divided based on total contact time, after adjusting for the covariates. Data are based on Actigraph measurements and include 140 patients. Unadjusted scores were mean(SD) +1489 (SD 2310) steps per day, +907 (SD 2306) steps per day and +193 (SD 2375) steps per day in low, medium and high contact time groups, respectively.