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Objectives <p>Emergency departments (EDs) have been confronted with growing demand for several decades. However, the strain on EDs is generally not evenly distributed across the year, as some days are at increased risk of overcrowding compared to others. Identifying the days during which teams are unable to meet actual service demands could be beneficial as a means to avoid, in the most drastic cases, redirecting patients to other care structures (ambulance diversion). The objective of this study was to identify the factors explaining ED overcrowding in a general hospital.</p> Methods <p>We conducted a retrospective study at a single emergency department between 1 January 2017 and 31 December 2021. The days with the highest deviation from baseline regarding length of stay were defined as being overcrowded. The factors associated with overcrowding were evaluated using a logistic regression model adjusted for the day’s characteristics.</p> Results <p>The study period comprised 183 overcrowded days and 1643 uncrowded days. The factors associated with the risk of crowding in multivariable analysis were the ED crowding status of the previous day, the number of patients at the beginning of the day, the proportion of patients age 75 or greater, the number of radiological exams per patient, and the number of radiological exams of the skull and brain region. The mitigating factors were the proportion of patients with less urgent needs during triage, an increased proportion of patients needing trauma care, the proportion of patients &lt; 7 years old, weekend days, and the epidemic period following the month of March 2020.</p> Conclusion <p>Our study has highlighted case-mix factors and chronological factors related to the risk of overcrowding. These factors were communicated to hospital management, which allowed the hospital to reassess its operations.</p>

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Factors associated with the phenomenon of overcrowding in the emergency department: a retrospective cohort study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月3日

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  • Jan Chrusciel,
  • Adrien Wartelle,
  • Antoine Sanchez,
  • Marine Desbouvry,
  • Amélie Brochet-Paille,
  • David Laplanche,
  • Stéphane Sanchez

摘要

Objectives

Emergency departments (EDs) have been confronted with growing demand for several decades. However, the strain on EDs is generally not evenly distributed across the year, as some days are at increased risk of overcrowding compared to others. Identifying the days during which teams are unable to meet actual service demands could be beneficial as a means to avoid, in the most drastic cases, redirecting patients to other care structures (ambulance diversion). The objective of this study was to identify the factors explaining ED overcrowding in a general hospital.

Methods

We conducted a retrospective study at a single emergency department between 1 January 2017 and 31 December 2021. The days with the highest deviation from baseline regarding length of stay were defined as being overcrowded. The factors associated with overcrowding were evaluated using a logistic regression model adjusted for the day’s characteristics.

Results

The study period comprised 183 overcrowded days and 1643 uncrowded days. The factors associated with the risk of crowding in multivariable analysis were the ED crowding status of the previous day, the number of patients at the beginning of the day, the proportion of patients age 75 or greater, the number of radiological exams per patient, and the number of radiological exams of the skull and brain region. The mitigating factors were the proportion of patients with less urgent needs during triage, an increased proportion of patients needing trauma care, the proportion of patients < 7 years old, weekend days, and the epidemic period following the month of March 2020.

Conclusion

Our study has highlighted case-mix factors and chronological factors related to the risk of overcrowding. These factors were communicated to hospital management, which allowed the hospital to reassess its operations.