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Quantifying emergency department crowding: comparison between two scores.

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Summary

Emergency department crowding can be effectively measured using the simple Occupancy Rate (OR) score, which is as accurate as the complex National Emergency Department Overcrowding Scale (NEDOCS) and aligns with staff perceptions.

Keywords:
Emergency department managementcrowdingoccupancy rate

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Area of Science:

  • Emergency Medicine
  • Healthcare Management
  • Quality Improvement

Background:

  • Emergency department (ED) crowding is a significant global issue impacting patient care and healthcare providers.
  • A lack of consensus exists on the best method for measuring ED crowding, leading to varied approaches.
  • Emergency physicians often choose from numerous scoring systems, ranging in complexity.

Purpose of the Study:

  • To compare the National Emergency Department Overcrowding Scale (NEDOCS) with the simpler ED Occupancy Rate (OR).
  • To evaluate the correlation between these crowding scores and a qualitative assessment by ED staff.

Main Methods:

  • The study was conducted in three Belgian hospitals with high annual ED census.
  • Crowding metrics were collected four times daily over a two-week period in January 2016.
  • Data included Occupancy Rate (OR), National Emergency Department Overcrowding Scale (NEDOCS), and subjective staff evaluations.

Main Results:

  • A strong, significant correlation was observed between the OR and NEDOCS across all three EDs (Pearson r ≈ 0.97).
  • Both OR and NEDOCS showed significant correlation with the subjective assessment of crowding by ED staff (p = 0.001).
  • Median OR ranged from 68-100, and NEDOCS ranged from 64.5-76.3.

Conclusions:

  • Validated scoring systems are essential for accurate ED crowding assessment.
  • The simple ED Occupancy Rate (OR) is as accurate as the more complex NEDOCS for measuring ED crowding.
  • The OR is highly correlated with the perceived level of crowding by ED staff, making it a practical and reliable measure.