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. 2021 Jun 24;14(7):e007741. doi: 10.1161/CIRCOUTCOMES.121.007741

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© 2021 American Heart Association, Inc.

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Figure 4. — Thirty-day all-cause readmission by intervention status. A, Shows 30-day all-cause readmission rates for the digital health intervention (DHI) group and the historical control group. B, Shows Nelson-Aalen estimates of the cumulative proportion of patients with 30-day readmission post-discharge. The numbers below the graph are the numbers of patients at risk in each study group at 5, 10, 15, 20, 25, and 30 days, when the last observed readmission event occurred.