Figure 3. A decision tree based on predicted probabilities from random forest exploring soluble urokinase plasminogen activator receptor (suPAR) and D‐dimer cutoff combinations for the stratification of patients by probability of venous thromboembolism (VTE).

The subgroup of patients with suPAR <11 ng/mL and D‐dimer <1.0 mg/L had a 3.6% probability of incident VTE during a COVID‐19 hospitalization. This subgroup represented 41% of the total study population. No other suPAR and D‐dimer cutoff combinations yielded a <5% probability of the outcome. The red color indicates lower probabilities, and the blue color indicates higher probabilities. Units for suPAR and D‐dimer as shown in the figure are ng/mL and mg/L, respectively.