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. 2020 Oct 29;6:77. doi: 10.1038/s41421-020-00221-6

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — A total of five cohorts (adult patients ≥18 years of age) were included in this retrospective study. Cohort A recorded 28 COVID-19 pneumonia patients with hypertension admitted to the Renmin Hospital of Wuhan University (Wuhan, China) from January 12 to February 9, 2020, cohort B recorded 16 COVID-19 pneumonia patients with hypertension admitted to the Fifth Medical Center of Chinese PLA General Hospital (Beijing, China) from December 27, 2019 to February 29, 2020, and cohort C recorded 630 COVID-19 pneumonia patients with hypertension admitted to the Leishenshan Hospital (Wuhan, China) from February 8 to April 14, 2020. A total of 655 patients with COVID-19 and comorbid hypertension were included in the data analysis.