Retrospective observational study
275
mainland China outside of Hubei Province, from December 18th, 2019 to March 8, 2022
History of coronary heart disease increases the mortality rate of COVID-19 patients: a nested case-control study
0
COVID-19 (death)
Comorbidities
Heart failure
Not present
Present
Hazard ratio
1.900 (0.900-3.900)
No