Figure 4.

Classification tree predicting OS. The analyses selected two chemokines and one growth factor in plasma samples able to identify four interaction patterns leading to final nodes 2 and 5–7, as indicated. The cut-off values of these cytokines (pg/mL) are indicated, and the splitting rule used in generating the survival tree was based on the log-rank statistics. The curves inside the squares show the Kaplan–Meier estimated survival of each group of patients, and time is indicated in months.