Retrospective observational study
291
First Hospital of Changsha and Loudi Central Hospital from January 23 to February 14, 2020, followed up to Feb 20, 2020
Epidemiological and clinical features of 291 cases with coronavirus disease 2019 in areas adjacent to Hubei, China: a double-center observational study
0
COVID-19 (severe/critical)
Comorbidities
Chronic respiratory disease
Not present
Present
Odds ratio
5.240 (1.460-18.860)
No
Yes