Retrospective observational study
275
mainland China outside of Hubei Province, from December 18th, 2019 to March 8, 2030
History of coronary heart disease increases the mortality rate of COVID-19 patients: a nested case-control study
0
COVID-19 (death)
Comorbidities
COPD
Chronic obstructive pulmonary disease
Not present
Present
Hazard ratio
1.900 (0.900-3.900)
No
Yes
Age, gender, admitted before 1/11/2020, renal failure, heart disease, cerebral infarction