Retrospective observational study
1099
552 hospitals in China between Dec 11, 2020 to Jan 29, 2020
Clinical Characteristics of Coronavirus Disease 2019 in China
0
COVID-19 (severe/critical)
Comorbidities
COPD
Chronic obstructive pulmonary disease
Not present
Present
Odds ratio
5.510 (1.760-17.290)
No
Yes