Retrospective observational study
275
mainland China outside of Hubei Province, from December 18th, 2019 to March 8, 2024
History of coronary heart disease increases the mortality rate of COVID-19 patients: a nested case-control study
0
COVID-19 (death)
Comorbidities
Chronic respiratory disease
Not present
Present
Hazard ratio
1.100 (0.400-2.500)
No