Risk factors for chronic kidney disease following acute kidney injury in pediatric allogeneic hematopoietic cell transplantation.

Risk factors associated with the progression of acute kidney injury to chronic kidney disease in pediatric allogeneic hematopoietic cell transplantation (AlloHCT) recipients are not well described. We retrospectively investigated the risk factors for the progression to CKD in 275 AlloHCT recipients. AKI and CKD grading was defined according to the Kidney Disease Improving Global Outcomes classification. PRI90 was defined as persistent renal insufficiency (estimated GFR < 90 ml/min/1.73 m2) 90 days after the first episode of AKI. The median age was 9.1 years. Incidence of stages 1, 2, and 3 AKI were 43%, 41%, and 15%, respectively. 86.1% met our study criteria for PRI90. Of the 236 PRI90 patients, 213 and 152 patients were evaluable for CKD at 1 and 3 years, respectively. The incidence of CKD at 1 and 3 years was 63.1% and 62.9%, respectively. On multivariable analysis, estimated GFR at initial episode of AKI (<80 ml/min/1.73 m2) and estimated GFR (<70 ml/min/1.73 m2) at PRI90 was a risk factor associated with CKD development and both risk factors were associated with significantly lower overall survival. To conclude, eGFR at the time of AKI and PRI90 may be considered for screening pediatric AlloHCT recipients at risk for the progression to CKD.