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
Laboratory Findings
PT
Prothrombin time
Not applicable
1 unit increase
Odds ratio
1.110 (1.010-1.220)
No
Yes
adjusted for age, sex ratio, underlying disease, treating with heparin, platelet count, and D-dimer
Timing of laboratory assessment not specified
Good