What this study adds
A rigorous statistical analysis with thorough adjustment for confounding
to properly investigate the treatment effect of prior therapeutic
anticoagulation on different clinically relevant outcomes in a large
cohort of hospitalized COVID-19 patients. Moreover, we are the first to
show that prior use of therapeutic anticoagulation is not associated
with better outcome parameters in hospitalized COVID-19 patients in
terms of all-cause mortality, ICU admittance, need for mechanical
ventilation, and length of hospital stay.