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. 2022 Jan 7;10(1):e30557. doi: 10.2196/30557

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©Aditya Vaidyam, John Halamka, John Torous. Originally published in JMIR mHealth and uHealth (https://mhealth.jmir.org), 07.01.2022.

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 https://mhealth.jmir.org/, as well as this copyright and license information must be included.

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A visual representation of the various categories of activity and sensor data type features using standardized functions as part of the Cortex data analysis toolkit; shown as part of Cortex is the distinction between the primary and secondary feature types, where secondary features are composed of primary features as opposed to raw patient-generated health data. Availability of wearable sensors depends on the device type used and supported application programming interface; Apple Watch (HealthKit) sensors are shown here. DBT: dialectical behavioral therapy.