• Vincenzo G Menditto, Francesca Fulgenzi, Martina Bonifazi, Umberto Gnudi, Silvia Gennarini, Federico Mei, and Aldo Salvi.
• Emergency Unit, Azienda Ospedaliero-Universitaria "Ospedali Riuniti", Ancona, Italy. Electronic address: vincenzogiannicola.menditto@ospedaliriuniti.marche.it.
• Am J Emerg Med. 2021 Aug 1; 46: 146149146-149.

IntroductionLittle is known on prevalence of early return hospital admission of subjects with COVID-19 previously evaluated and discharged from emergency departments (EDs). This study aims to describe readmission rate within 14 days of patients with COVID-19 discharged from ED and to identify predictors of return hospital admission.MethodsWe performed a retrospective cohort study of adult patients with COVID-19 discharged from two EDs. Return hospital admission was defined as an unscheduled return ED visit within 14 days after initial ED evaluation and discharge. We compared the group of patients who had a return hospital admission to those who did not. We also evaluated selected clinical characteristics (age, neutrophilia, SOFA, lactate dehydrogenase, C-reactive protein and D-dimer) associated with return hospital admission.ResultsOf 283 patients included in the study, 65 (22.9%) had a return ED visit within 14 days. 32 of those patients (11%) were then hospitalized, while the remaining 33 were again discharged. Patients requiring a return hospital admission was significantly older, had higher pro-calcitonin and D-dimer levels. Major predictors of return hospital admission were cognitive impairment (OR 17.3 [CI 4.7-63.2]), P/F < 300 mmHg (OR 8.6 [CI 1.6-44.3]), being resident in geriatric care facility (OR 7.6 [CI 2.1-26.4]) and neutrophilia (OR 5.8 [CI 1.6-22.0]).ConclusionSeveral factors are associated with 14-day return hospital admission in COVID-19 subjects. These should be considered when assessing discharge risk in ED clinical practice.Copyright © 2021. Published by Elsevier Inc.

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