Volume-related differences in emergency department performance.

Area of Science:

• Emergency Medicine
• Healthcare Operations Research

Background:

• Emergency departments (EDs) are critical access points for over 136 million US visits annually, with over half of hospital admissions originating in the ED.
• The Joint Commission's patient flow standards necessitate the measurement and monitoring of emergency department performance.
• A study investigated the relationship between ED volume, operating characteristics, and performance metrics.

Purpose of the Study:

• To correlate emergency department (ED) volume and operating characteristics with performance on key metrics.
• To identify predictors of operational performance in emergency departments.
• To inform ED design, operations, and policy decisions.

Main Methods:

• Retrospective analysis of the 2009 Emergency Department Benchmarking Alliance (EDBA) annual survey data.
• Utilized data from 358 hospitals representing 14.6 million ED visits.
• Ensured ED size representation approximated the Emergency Medicine Network (EM Net).

Main Results:

• Larger EDs with higher annual volumes demonstrated significantly poorer performance: longer lengths of stay (p < .0001), higher left-without-being-seen rates (p < .0001), and longer door-to-physician times (p < .0001).
• Operating characteristics indicating higher patient acuity were associated with worsened performance metrics.
• Characteristics indicating lower acuity were associated with improved performance.

Conclusions:

• Emergency department (ED) volume is the strongest predictor of operational performance and can be used for comparative analysis.
• Patient acuity and other operating characteristics also significantly influence ED performance.
• Performance measures should incorporate ED volume, acuity, and other factors for accurate assessment and to guide improvements in ED design and operations.