Etiology and Outcome of Community-Acquired Acute Kidney Injury in Pediatric Inpatients

ABSTRACT

Objective: To estimate the etiology, outcome, and risk factors for mortality in children with community-acquired acute kidney injury (CA-AKI). Methods: Between October, 2020 and December, 2021, consecutive hospitalized children aged 2 mo-12 years with a minimum 24 hours of stay, and at least one serum creatinine level measured at or within 24 hours of hospitalization were prospectively enrolled. CA-AKI was labelled in children with an elevated serum creatinine level at admission and subsequent fall during hospitalization. Results: Of 2780 children, 215 were diagnosed as CA-AKI (7.7%, 95% CI 6.7-8.6). Diarrhea with dehydration (39%) and sepsis (28%) were the most common causes of CA-AKI. 24 children (11%) died during hospitalization. Requirement of inotropes was an independent predictor of mortality. Out of 191 children discharged, 168 (88%) had complete renal recovery. At 3 months, out of 22 children without complete renal recovery, 10 progressed to chronic kidney disease (CKD), with 3 becoming dialysis dependent. Conclusions: CA-AKI is common in hospitalized children, and is associated with increased risk of progression to CKD, especially in those with incomplete renal recovery.