The significant impact of acute kidney injury on CKD in patients who survived over 10 years after myeloablative allogeneic SCT

There are no well-defined studies of chronic kidney disease (CKD) among long-term survivors after hematopoietic SCT. A retrospective longitudinal study was conducted to characterize CKD in 77 subjects that had undergone myeloablative allogeneic SCT, all of whom had their serum creatinine (Cr) levels followed-up during the 10-year period after SCT. Their mean (range) survival time was 14.4 (10.5–20.2) years. CKD was defined as a persistent decrease in the Cr-based estimated glomerular filtration rate to below 60 mL/min/1.73 m2. Acute kidney injury (AKI) was defined as an increase in Cr within the first 100 days after SCT, and its severity was classified into three stages according to the AKIN criteria. Kaplan–Meier and Cox proportional hazards regression analyses evaluated the association between AKI and the incidence of CKD. The cumulative incidence of CKD increased over time and reached 34% at 10 years. After adjusting for known risks for post-SCT CKD, each AKIN stage was strongly associated with the incidence of CKD. The incidence of CKD probably increases over time among subjects who are alive at >10 years after SCT. This study places a new emphasis on AKI as an important risk factor for CKD in post-SCT subjects.