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Published on: January 12, 2024
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PICU Volume and Outcome: A Severity-Adjusted Analysis.
Barry P Markovitz1, Irina Kukuyeva, Gerardo Soto-Campos
11Departments of Pediatrics and Anesthesiology Critical Care Medicine, Children's Hospital Los Angeles, University of Southern California Keck School of Medicine, Los Angeles, CA. 2VPS, LLC, Los Angeles, CA.
Summary
Higher pediatric intensive care unit (PICU) volume is linked to increased mortality for critically ill patients. For less severe cases, PICU volume does not impact patient mortality rates.
Area of Science:
- Pediatric critical care medicine
- Health services research
- Quality improvement in healthcare
Background:
- Pediatric intensive care unit (PICU) volume is a potential indicator of care quality.
- Understanding the relationship between PICU volume and patient outcomes is crucial for optimizing care delivery.
Purpose of the Study:
- To investigate the association between PICU patient volume and severity-adjusted mortality.
- To determine if this relationship differs based on patient illness severity.
Main Methods:
- Retrospective cohort study using the national VPS database (2009-2012).
- Analyzed 186,643 patients from 92 PICUs.
- Utilized mixed-effects logistic regression to assess volume's impact on mortality, adjusting for patient and unit factors.
Main Results:
- A nonlinear relationship was observed between PICU volume and mortality, varying by illness severity.
- For low-severity patients (PICU-2 risk of mortality ≤10%), volume showed no clear association with mortality.
- For high-severity patients, mortality increased proportionally with higher PICU volume.
Conclusions:
- PICU volume is not associated with mortality in low-severity pediatric patients.
- Higher PICU volume is linked to increased severity-adjusted mortality in critically ill pediatric patients.
- Potential explanations include variations in quality of care, unmeasured confounders, or limitations in severity scoring calibration.
