Retrospective observational study
200
Union Hospital of Huazhong University of Science and Technology from Jan 1 to Jan 30, 2020
Influence factors of death risk among COVID-19 patients in Wuhan, China: a hospital-based case-cohort study
0
COVID-19 (death)
Patient characteristics
Smoking
Not present
Present
Odds ratio
0.810 (0.440-1.480)
No