Do Non-COVID-19 Patients' Behaviour Towards Emergency Changed During the COVID-19 Outbreak? A Severity-Based Approach.

Objective: During the COVID-19 pandemic, the number of patients presenting to the emergency department (ED) declined. The main goal of this study was to compare and describe the non-COVID-19 patient's disease severity presentation during the pandemic with its pre-pandemic severity.

Methods: We conducted a retrospective observational study. We selected two samples of visits: one during the first COVID-19 wave of 2020 (pandemic period, PP) and the other during the same months of 2019 (control period, CP). The primary endpoints were the comparison of severity and distribution of the Emergency Severity Index (ESI). Secondary endpoints were comparisons of specific patient characteristics (age, sex, length of the symptoms before the visits, spontaneous visits or not, return home or not).

Results: The mean ESI of the visits during the PP (3.19) was statistically significantly lower ( = 0.001) than it was in the CP (3.43). These changes were more pronounced during the months of March (3.03 versus 3.33, = 0.037) and April (2.96 versus 3.48, < 0.001). The change in ESI was mainly due to an increase in the proportion of visits by patients with an ESI score of 3 (42% versus 28%, < 0.001). There were no differences in the characteristics of patients except a decline in patients whose symptoms had a duration of more than 30 days (2% during PP versus 4% during CP, = 0.03).

Conclusion: The COVID-19 pandemic caused a change in the pattern of non-COVID-19 visits, with proportionally more severe presentations based on the ESI. To our knowledge, this is the first description of changes in behaviour in ED visits by specifically non-COVID-19 patients.