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Outcomes of boarding critically ill patients in U.S. EDs: A systematic review and meta-analysis

Htet NN, Walker JA, Jafari D, Rech MA, Hintze T, Moran M, Bai J, Dinh K et al.

The American journal of emergency medicine, 2026

407,178 participants · 4 citations

Abstract

INTRODUCTION

Boarding is the practice of holding patients in the emergency department (ED) or a temporary location after the decision to admit or transfer has been made. Previous literature suggests that ED Length of Stay (LOS), prolonged in boarded patients, is linked to worse outcomes. We conducted a systematic review and meta-analysis (SR/MA) to evaluate the differences in mortality and hospital LOS in ED-boarding (EDB) and non-ED boarding (non-EDB) critically ill patients in U.S. EDs.

METHODS

A systematic search was performed with medical librarians using major health science databases from 2012 through December 2024. Eligible studies included observational or randomized trials involving adults comparing EDB and non-EDB groups in U.S. EDs. Only full-text English-language articles were included. Outcomes were mortality and hospital LOS. We used random-effects meta-analysis to compare the outcomes. Heterogeneity was assessed with the I2 value while publication bias was assessed via the funnel plot.

RESULTS

We identified 3139 studies and included 17, comprising 407,178 ED patients: 194,814 (48 %) EDB and 212,364 (52 %) non-EDB. 87.4 % of patients came from urban academic Emergency Departments with a resuscitation unit or team. Median ED LOS was 6.5 h (IQR 5.18-8.1) for EDB and 4.2 h (IQR 2.38-5.75) for non-EDB (p < 0.01). EDB patients had similar all-cause mortality (OR 1.06, 95 % CI 0.94-1.19, I2 = 69 %, p = 0.38) and hospital LOS (mean difference 0.38 days, 95 % CI…

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Evidence Hub reads this as a meta-analysis, done in people. Its evidence level is 1 of 5 (Highest · pooled evidence). Pooled evidence from several studies sits at the top of the evidence pyramid. Reported size: 407,178 participants or records.

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