• Valeria Caramello, Alessandro Maciotta, Alessandro Vincenzo De Salve, Valentina Gobbi, Tommaso Maria Ruffino, Giulia Mazzetti, Lorenzo Ricagni, Camilla Ling, Roberto Arione, Adriana Boccuzzi, Giuseppe Costa, Carlotta Sacerdote, and Fulvio Ricceri.
• Emergency Department and High Dependency unit, AOU San Luigi Gonzaga, Orbassano (TO) (Italy).
• Epidemiol Prev. 2020 Sep 1; 44 (5-6 Suppl 2): 208-215.

Backgroundthe emergency due to SARS-CoV-2 pandemic struck the national and regional health system that needed an effort to reorganise and increase resources to cope with a sudden, uncertain, and previously unknown situation. This study was conducted in the immediate aftermath of this difficult period.Objectivesto describe clinical characteristics, short-term outcomes, and management of SARS-CoV-2 positive patients that accessed the emergency department (ED) of the San Luigi Gonzaga hospital of Orbassano (Turin district, Piedmont Region, Northern Italy) in March and April 2020. Furthermore, this study aimed at investigating if a difference in patients characteristics, clinical management, and outcomes was present during time.Designcomparison of different periods in a clinical cohort.Setting And Participantsfor each patient who accessed the ED and tested positive for SARS-CoV-2 swab, the ED medical record was collected and a descriptive analysis was performed on demographical characteristics, pre-existing comorbidities, parameters measured at triage, imaging exams results, lab tests results, separately for patients admitted at the ED in four different periods.Main Outcome Measuresdischarge from ED, admission to hospital wards (low and high intensity of care), short term in-hospital mortality, hospital length of stay. The association between patients' characteristics and the main outcomes was measured using multivariable logistic models.Resultsage of patients increased significantly from March to April, together with female prevalence and associated comorbid conditions. A significant difference in symptoms at presentation was not observed nor it was in laboratory test results. Severity at triage and need of intensive care resources were higher in the first weeks, together with the typical clinical presentation with respiratory failure and imaging with signs of bilateral interstitial pneumonia. Accordingly, in-hospital mortality was higher in the first period. Nevertheless, nearly half of patients in the first period were discharged directly from ED showing mild COVID-19 cases. On the contrary, in April an increasing need of hospitalisation in low intensity of care beds was observed, whereas mild cases stopped to access the ED.Conclusionsthe results of this study suggest that in few weeks of COVID-19 epidemic both management of the patients at the hospital level - and probably at territorial level resulting in a different population who accessed to the ED - and the clinical characteristics of the COVID-19 patients changed.

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