Table 3. Risk ratios of CRP, the NLR and Combined Index.

Variables	RR (95% CI)	P
CRP ≥25.93	4.667 (1.681–12.956)	<0.001
NLR ≥4.87	8.458 (1.962–36.471)	<0.001
Combined Index (training) ≥0.66	7.792 (2.613–23.233)	<0.001
Combined Index (validation) ≥0.66	10.400 (2.224–48.624)	<0.001

CRP, C-reactive protein; NLR, neutrophil-to-lymphocyte ratio.