Fig. 1
X-tile plots of NLR on single-nodule small hepatocellular carcinoma following curative resection. The X-tile plots show the χ 2 log-rank values with cutpoint, producing low and high subgroups. a The X-axis represents all potential cut-off values from low to high (left to right) that define a low subset, whereas the Y-axis represents cut-off values from high to low (top to bottom) that define a high subset. Red coloration of cut-off values indicates an inverse correlation with time to recurrence, and green coloration represents direct associations. The optimal cut-off value occurs at the brightest pixel (green or red). b A histogram of the entire cohort divided into low and high subgroups according to the optimal cut-off value of NLR (2.1). c The statistical significance of relative risk (RR) generally assessed by Cox proportional hazards model. The X-axis represents all potential cut-off values from low to high (left to right), and the Y-axis of the graph is log of the relative risks. The red line is the optimal cutpoint of NLR (2.1). d A Kaplan-Meier plot of NLR for time to recurrence produced by the optimal cut-off value of NLR. Blue represents the low subgroup, and gray represents the high subgroup