Risk stratification for failure-free survival (FFS) in patients without POD24 according to 3 pretreatment risk models. Kaplan-Meier curves for FFS beyond 2 years after treatment initiation for patients without POD24 according to (A) the FLIPI, (B) the m7-FLIPI, and (C) the POD24-PI. Numbers in parentheses indicate patients with event/number of patients per subgroup. Pie charts illustrate distribution of risk status of the respective risk classifier and POD24 status.