Table 2.

Performance of select models developed based on data collected ≤12 hours after admission.

Model	Validation set weighted F1 score (%), mean (SD)
L1SVM alla	90.39 (3.25)
L1SVM 7b	94.08 (1.81)
L1SVM no LDHc, albumind	89.65 (4.30)
L1SVM no LDH, albumin, D-D dimere	89.64 (4.89)

^aL1SVM all: ℓ₁-regularized support vector machine model developed using all the variables in the data set.

^bL1SVM 7: ℓ₁-regularized support vector machine model using 7 variables.

^cLDH: lactate dehydrogenase.

^dL1SVM no LDH, albumin: ℓ₁-regularized support vector machine model developed using all variables except LDH and albumin.

^eL1SVM no LDH, albumin, D-D dimer: ℓ₁-regularized support vector machine model developed using all variables except LDH, albumin, and D-D dimer.