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
Treatment
Treatment for COVID-19
none
Not received
Treated with heparin (patients with D-dimer >6 ULN)
Odds ratio
0.440 (0.230-0.870)
Yes
No
Not applicable
ULN= upper limit of normal Stratified analysis was performed. Only patients with D-dimer >6 ULN were included (n=161) Number of cases and total number of patients in the reference/comparison category not available
Good