AKI and Mortality in Children Hospitalized With Malnutrition

Anthony Batte1,2,3,4, Aidah Namugumya4, Denise C Hasson5

  • 1Child Health and Development Center, College of Health Sciences, Makerere University, Kampala, Uganda.

Insights

Acute kidney injury (AKI) is common in malnourished children and linked to mortality when specific creatinine thresholds are used. Current risk scores are ineffective, highlighting the need for better AKI detection methods in this vulnerable group.

Area of Science:

  • Pediatric Nephrology
  • Global Health
  • Critical Care Medicine

Background:

  • Acute kidney injury (AKI) is a frequent complication in hospitalized children.
  • Children with acute malnutrition present unique challenges for AKI diagnosis due to low baseline creatinine levels.

Purpose of the Study:

  • To determine the prevalence of AKI in children hospitalized with acute malnutrition.
  • To assess how different AKI definitions, particularly those incorporating minimum creatinine thresholds, affect risk stratification.
  • To evaluate the performance of the STOP AKI risk score in this population.

Main Methods:

  • 185 Ugandan children hospitalized with acute malnutrition were enrolled.
  • AKI was defined using Kidney Disease: Improving Global Outcomes (KDIGO) criteria with serial creatinine measurements.
  • The study evaluated the impact of minimum absolute creatinine thresholds (e.g., 0.4 mg/dl) on AKI identification and its association with mortality.

Main Results:

  • AKI, defined by KDIGO without a minimum threshold, was not associated with mortality.
  • Applying a 0.4 mg/dl minimum creatinine threshold identified AKI in 23.2% of children and was independently associated with increased mortality (aOR: 4.06).
  • The ISN STOP AKI risk score showed poor discrimination for AKI risk (AUROC: 0.50).

Conclusions:

  • Clinically meaningful AKI in malnourished children is strongly associated with mortality when appropriate creatinine thresholds are applied.
  • Standard AKI risk prediction tools perform poorly in this population.
  • There is a critical need for adapted strategies to identify AKI in children with acute malnutrition.
Abstract

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