Figure 2.

A. Kaplan–Meier survival curves, illustrating the prognostic impact of the D-dimer threshold (1128 ng/mL) at admission. B. Adjusted Kaplan–Meier survival curves for Cox proportional hazards model that included age, history of malignancy, history of high blood pressure, the use of oral anticoagulation before COVID-19, the concentration of plasma creatinine, abnormalities on chest computed tomography scan (< or > 50% of parenchymental involvement) and the occurrence of a venous thrombosis event (deep vein thrombosis and/or pulmonary embolism). Adjusted survival curves show how a D-dimer threshold at admission of 1128 ng/mL influenced survival estimated from the Cox proportional hazards model. *Using the log-rank test.