- Some personal histories of COVID-19 patients in this study were incomplete. 
- The study did not include smoking history (an important risk factor for infection and death in older patients).
- The Zhongnan Hospital was the only specified hospital for severe COVID-19 patients early on in the outbreak, potentially leading to selection bias. 

Smith College

This study took place in Zhongnan Hospital of Wuhan University from January 1, 2020, to February 10, 2020. The median age of the 203 patients diagnosed with COVID-19 was 54 years. Among patients who were 65 years old or older, the mortality rate was 34.5 % (19/55). In younger patients in the same study, the mortality rate was 4.7% (7/148). The most common symptoms of older COVID-19 patients were fever, dry cough, and chest distress. Compared to younger COVID-19 patients, older patients had more laboratory abnormalities and comorbidities. 

Clinical Characteristics and Outcomes of Older Patients with Coronavirus Disease 2019 (COVID-19) in Wuhan, China

Chen, T., Dai, Z., Mo, P., Li, X., Ma, Z., Song, S., . . . Xiong, Y. (2020). Clinical Characteristics and Outcomes of Older Patients with Coronavirus Disease 2019 (COVID-19) in Wuhan, China: A Single-Centered, Retrospective Study. The Journals of Gerontology: Series A. doi:10.1093/gerona/glaa089
https://academic.oup.com/biomedgerontology/article/doi/10.1093/gerona/glaa089/5819242

Clinical Characteristics and Outcomes of Older Patients with Coronavirus Disease 2019 (COVID-19) in Wuhan, China: A Single-Centered, Retrospective Study

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