Fig. 2
Kaplan-Meier survival curves comparing patients ≥70 years choosing dialysis or conservative care, from eGFR < 20 mL/min/1.73m2: overall comparison of both groups (part a; median survival: 4.3 [2.1–7.6] versus 2.4 [1.4–3.7] years); after stratification of age (b and c); after stratification of Davies comorbidity scores with no and intermediate comorbidity taken together versus severe comorbidity (d and e). The total number of included patients in this analysis was lower because some were referred after eGFR < 20 mL/min/1.73m2. See Additional files 2, 3 and 4 for the survival curves from the other starting points (treatment decision, eGFR < 15 and < 10 mL/min/1.73m2)