Clinical characteristics and outcomes of the first two waves of the COVID-19 pandemic in a community hospital: a retrospective cohort study.

Objective: To describe the clinical characteristics and outcomes of two waves of the COVID-19 pandemic.

Methods: A de-identified dataset of patients with COVID-19 admitted to our community hospital in Evanston, Illinois, from March 1, 2020 to February 28, 2021 was retrospectively reviewed. Patients from the first wave were identified as those admitted during the initial peak of admissions observed at our hospital between March 1, 2020 and September 3, 2020. The second wave was defined as those admitted during the second peak of admissions observed between October 1, 2020 and February 28, 2021.

Results: In total, 671 patients were included. Of these, 399 (59.46%) were identified as patients from the first wave and 272 (40.54%) as patients from the second wave. Significantly more patients received steroids (86.4% vs 47.9%, < 0.001), remdesivir (59.6% vs 9.5%, < 0.001), humidified high-flow nasal cannula (18% vs 6.5%, < 0.001), and noninvasive ventilation (11.8% vs 3.3%, < 0.001) during the second wave. Patients from the first wave had a greater hazard for death compared with patients from the second wave (hazard ratio [HR] 1.62, 95% CI 1.08-2.43;  = 0.019).

Conclusion: Among patients hospitalized with COVID-19 in our community hospital, there was a decrease in case-fatality rate in the second surge of the COVID-19 pandemic compared with the first wave.