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. 2021 Feb 22;23(2):e21037. doi: 10.2196/21037

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©Avner Abrami, Steven Gunzler, Camilla Kilbane, Rachel Ostrand, Bryan Ho, Guillermo Cecchi. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 22.02.2021.

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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Test set AUROC (PD vs Control) as a function of the chosen video distribution quantile to use as the “Q” threshold. A wide range of quantiles achieves AUROC > 0.7 (15th quantile and below). The fifth quantile, selected as our video score threshold, is shown in green. AUROC: area under the receiver operating characteristic curve; PD: Parkinson disease.