Table 2. Predictive performance of CRP, the NLR and Combined Index for the 7-day endpoint.

Variables	Cut-off	AUC (95% CI)	Sensitivity	Specificity	P*
CRP	25.96	0.685 (0.574–0.783)	60.87%	75.00%	<0.001
NLR	4.87	0.764 (0.659–0.850)	56.52%	86.89%	<0.001
Combined Index (training)	0.66	0.804 (0.702–0.883)	73.91%	76.67%	<0.001
Combined Index (validation)	0.66	0.881 (0.782–0.946)	76.92%	91.38%	<0.001

*, P value for AUC. NLR, neutrophil-to-lymphocyte ratio; CRP, C-reactive protein; AUC, area under the curve.