Validating the Emergency Department Avoidability Classification (EDAC): A cluster randomized single-blinded agreement...

Area of Science:

• Emergency Medicine
• Health Services Research
• Primary Care

Background:

• The Emergency Department Avoidability Classification (EDAC) is a tool to identify emergency department (ED) visits manageable in primary care.
• EDAC has not been validated against a criterion standard, limiting its reliable use for quantifying avoidable ED visits.

Purpose of the Study:

• To validate the EDAC by comparing its classifications of avoidable ED visits with expert physician judgments.
• To assess the EDAC's accuracy, sensitivity, and specificity in identifying ED visits appropriate for subacute primary care.

Main Methods:

• A cluster randomized, single-blinded agreement study was conducted in an academic hospital.
• 160 ED visit charts were independently reviewed by two ED physicians to determine avoidability.
• Interrater agreement (Cohen's kappa) and correlation (Spearman's rho) were calculated.

Main Results:

• Physicians showed substantial agreement (kappa = 0.69) on 86.9% of ED visits.
• The EDAC demonstrated a high correlation with physician judgments (0.64).
• The EDAC accurately identified visits suitable for primary care (82.8% accuracy).

Conclusions:

• The EDAC is a validated tool for classifying avoidable ED visits.
• The EDAC can reliably monitor trends in avoidable ED utilization.
• This classification can inform interventions to reduce non-urgent ED visits.