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Association Between Elevated RBC Distribution Width and Multiple Organ Dysfunction in Pediatric Critical Illness.

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High red blood cell distribution width (RDW) in children admitted to the pediatric intensive care unit (PICU) is linked to worse outcomes. Elevated RDW (>15.7%) is associated with multiple organ dysfunction and longer hospital stays.

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Area of Science:

  • Pediatric Critical Care Medicine
  • Hematology
  • Clinical Biomarkers

Background:

  • Red blood cell distribution width (RDW) is a component of the complete blood count.
  • Published studies indicate RDW is a significant biomarker for adverse health outcomes.

Purpose of the Study:

  • To investigate the association between admission RDW values and clinical outcomes in pediatric intensive care unit (PICU) patients.
  • To determine if RDW predicts multiple organ dysfunction, mechanical ventilation duration, and length of stay.

Main Methods:

  • Retrospective, single-center study of patients admitted to a US tertiary pediatric hospital between 2016 and 2017.
  • Exclusion criteria included age over 21, pregnancy, and recent packed red blood cell (RBC) transfusion.
  • RDW values were categorized into four groups, with group IV representing RDW > 15.7%.

Main Results:

  • Increased RDW at admission was significantly associated with multiple organ dysfunction syndrome within the first 7 days (30.1% in group IV vs. 11.8% in group I).
  • Higher RDW correlated with increased median duration of mechanical ventilation (7 days vs. 5 days), hospital length of stay (13 days vs. 5 days), and PICU length of stay (4 days vs. 3 days).
  • No statistically significant association was found between admission RDW and mortality.

Conclusions:

  • Admission RDW values exceeding 15.7% in pediatric intensive care unit patients, without recent RBC transfusion, are linked to higher rates of multiple organ dysfunction syndrome.
  • Elevated RDW is also associated with prolonged mechanical ventilation and extended hospital stays.
  • RDW serves as a valuable predictive marker for adverse clinical outcomes in critically ill children.