Fig. 2

a Cut-off value for NLR applied with ROC curves for RFS. The area under the ROC curve was 0.673. An NLR value of 2.34 was considered as the cut-off value because of its maximal Youden index; the sensitivity and specificity were 69.3 and 70.8%, respectively b. Cut-off value for PLR applied with ROC curves for RFS. The area under the ROC curve was 0.788. An PLR value of 185.04 was considered as the cut-off value because of its maximal Youden index; the sensitivity and specificity were 70.8 and 81.7%, respectively