• Erin L Simon, Sunita Shakya, Louisa Liu, Greg Griffin, Courtney M Smalley, Seth Podolsky, and Rakesh Engineer.
• Cleveland Clinic Akron General, Department of Emergency Medicine, United States. Electronic address: SimonE@ccf.org.
• Am J Emerg Med. 2019 Jul 1; 37 (7): 1307-1312.

BackgroundFreestanding emergency departments (FEDs) care for all patients, including critically ill, 24/7/365. We characterized patients from three FEDs transferred to intensive care units (ICU) at a tertiary care hospital, and compared hospital length of stay(LOS) between patients admitted to ICUs from FEDs versus a hospital-based ED (HBED).MethodsWe performed a retrospective, observational cohort study from January 2014 to December 2016. Demographic and clinical information was compared between FED and HBED patients with chi-square and fisher's exact tests for categorical variables and Student's t-test for continuous variables. The main outcome of interest was hospital LOS. Multi-variable linear regression was performed to estimate association between LOS and emergency facility type, while adjusting for potential confounders.ResultsWe included 500 critically ill patients (FED = 250 and HBED = 250). Patients did not differ by age, gender, or BMI. FED patients were more likely to be white (89.6% vs. 70.8%, p < 0.001) and have higher Charlson Co-morbidity Index scores (3.5 vs. 2.4, p < 0.001). Average LOS for FED patients was 5 days, compared to 7 days for HBED patients (p < 0.001). After adjusting for demographic and clinical confounders, there was significant correlation between ED facility type and LOS in hospital (p < 0.001).ConclusionPatients transferred from FEDs to an ICU were similar in age and gender, but more likely to be white with a higher Charlson Comorbidity Index score. FED patients experienced shorter hospital length of stay compared to patients admitted from a HBED.Copyright © 2018 Elsevier Inc. All rights reserved.

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