Volume-outcome relationships in pediatric intensive care units

Area of Science:

• Pediatric Critical Care Medicine
• Healthcare Management
• Health Services Research

Background:

• Pediatric intensive care units (PICUs) have seen national expansion, but the impact of regionalization on patient outcomes remains understudied.
• Limited research exists on the relationship between patient volume and outcomes within PICUs.
• Establishing this volume-outcome relationship is crucial for developing effective regionalization strategies for pediatric critical care.

Purpose of the Study:

• To investigate the association between patient volume and other unit characteristics with patient outcomes in PICUs.
• To determine if increased patient volume in PICUs improves mortality risk.
• To assess if higher patient volume in PICUs leads to a reduced length of stay.

Main Methods:

• Prospective multicenter cohort study involving 16 PICUs.
• Data collected from 11,106 consecutive admissions over a 12-month period.
• Multivariate analyses used to examine risk-adjusted mortality and length of stay, controlling for illness severity and case-mix.

Main Results:

• A significant inverse relationship was found between PICU patient volume and both risk-adjusted mortality and length of stay.
• Each 100-patient increase in PICU volume was associated with a decrease in risk-adjusted mortality (OR: 0.95; 95% CI: 0.91-0.99).
• Increased patient volume also reduced length of stay (IRR: 0.98; 95% CI: 0.975-0.985).
• Unit characteristics like fellowship programs, university affiliation, bed count, or children's hospital status did not impact outcomes.

Conclusions:

• PICU patient volume is inversely related to risk-adjusted mortality and length of stay.
• Findings support the need for further research to inform regionalization and referral policies for critically ill children.
• Volume-outcome relationships are critical considerations for optimizing pediatric critical care delivery.