Figure 1: Receiver operating characteristic (ROC) plot: Receiver Operating Characteristic (ROC) plot of circulating level of lipocalin 2 ≥ 116.7 (ng/ml) and freedom from death or cancer metastasis. The area under the curve was 0.673. When the cut-off value of lipocalin 2 ≥ 116.7 (ng/ml), the sensitivity and specificity were 73.0% and 60.0%, respectively for predicting freedom from long-term death or cancer metastasis.