- Study inclusion and exclusion criteria.
| Inclusion criteria | Exclusion criteria |
|---|---|
| Randomized controlled trials, controlled (non-randomized) clinical trials or cluster trials, prospective and retrospective comparative cohort studies, and case-control or nested case-control studies. | Cross-sectional studies, case series, and case reports. |
| Studies involving the general adult human population who are 18 years of age or older. | |
| Studies that involve COVID-19 patients who are receiving anticoagulation as an intervention during their hospital stay to affect mortality. | Studies with a population of non-COVID-19 hospitalizations. |
| Studies in the English language. |