Fig. 2

a Kaplan-Meier estimates for overall survival (OS) according to ECOG performance status. The median OS was 17.7 months (95% CI 13.1–22.3) for ECOG 0 versus 2.5 months (95% CI 0.0–9.6) for ECOG ≥1. Three patients were not included due to missing data. b Kaplan-Meier estimates for OS according to the prognostic score based on the serum parameters LDH, CRP, and REC. The groups with low and intermediate risk were pooled due to a small number of cases. The median OS was 17.7 months (95% CI 14.7–20.8) in the low plus intermediate group versus 15.4 months (95% CI 12.7–18.2) in the high risk group versus 7.1 months (95% CI 0.0–16.2) in the very high risk group. The p-values indicated were calculated with the log-rank test. One patient was not included due to missing data