Fig. 2From: Effects of patient age on patency of chronic hemodialysis vascular accessKaplan–Meier survival analysis of elderly patients (≥65 years). Kaplan–Meier estimates of (a) primary and (b) secondary VA patency rates in elderly patients stratified by body mass index (BMI) (< 23 kg/m2 vs. ≥23 kg/m2)Back to article page