Table 2.

Test performance of LBP, EndoCab IgM and I-FABP at T0 for prediction of ICU admission.

Prediction ICU vs non ICU	Optimal cut-off	Se	Sp	AUC (CI 95%)
LBP, ng/ml	20040	0.75	0.54	0.67 (0.54-0.80)
EndoCab IgM, MU/mL	97.42	0.85	0.41	0.63 (0.51-0.76)
I-FABP, pg/mL	689.7	0.66	0.62	0.64 (0.52-0.71)

Optimal cut-off for each marker was derived by Youden’s Index. Se, sensitivity; Sp, specificity. LPB, Lipopolysacharide Binding Protein; I-FABP, Intestinal Fatty Acid Binding Protein; T0, sample collected at the moment of COVID-19 diagnosis.