Fig. 1From: Characteristics, risk factors and outcome of BKV nephropathy in kidney transplant recipients: a case–control studyComparative event-free survival curves between BKVN cases and matched controls for acute rejection episodes (A) and return to dialysis (B). Survival and event-free survival curves were obtained using Kaplan–Meier plots with censoring for loss to follow-up or end of observation for survival without rejection (A) and survival without dialysis (B). Comparison between cases and controls were made using log-rank testsBack to article page