China
Retrospective cohort study
Medical records
449
Consecutive patients with severe COVID-19
181 females and 268 males. The mean age at disease onset was 65.1 years
Total
28 Day
COVID-19 (death)
134
Died within 28 days
Patient characteristics
Age
none
Not applicable
1 year increase
Odds ratio
1.030 (1.010-1.060)
No
Yes
risk was adjusted for sex ratio, underlying disease, treating with heparin, prothrombin time, platelet count and D-dimer
None
Good