Table 3. Comparison of AUC area between the three indexes.

Variables	AUC area	Z	P value
Overall survival
NLR vs. PNI	0.542 vs. 0.623	1.272	0.203
PNI vs. PNI-NLR	0.623 vs. 0.641	0.472	0.637
NLR vs. PNI-NLR	0.542 vs. 0.641	2.215	0.027
5-year survival
NLR vs. PNI	0.585 vs. 0.673	1.943	0.052
PNI vs. PNI-NLR	0.673 vs. 0.685	0.028	0.813
NLR vs. PNI-NLR	0.585 vs. 0.685	2.844	0.004

NLR, neutrophil to lymphocyte ratio; PNI, prognostic nutritional index; AUC, areas under the ROC curve.