Effect of COVID-19 pandemic on orofacial and respiratory infections in ear, nose, and throat and oral and maxillofacial surgery emergency departments: a retrospective study of 7900 patients.

Objectives: The study purpose was to evaluate the effects of the COVID-19 pandemic on the rate and disease profile of orofacial and respiratory infections in oral and maxillofacial surgery (OMFS) and ear, nose, and throat (ENT) emergency units.

Materials And Methods: Records of patients with orofacial or respiratory infection, or infectious symptoms, diagnosed in the OMFS or ENT Emergency Departments of the Helsinki University Hospital, Helsinki, Finland between 1st March and 30th October 2020 and the corresponding periods in 2018 and 2019 were reviewed. The main outcome variable was the occurrence of studied infections during the evaluated periods. Other study variables were age, gender, residence area, speciality, specific cause for the emergency department visit and admission to ward.

Results: There was a significant 37% decrease in the number of infection patients in 2020 compared to the years 2019 and 2018 (1894 vs. 2929 and 3077, respectively, p < .001). A mean decrease of 51% (from 1319 and 1249 patients in 2018 and 2019, respectively, to 592 patients in 2020) was seen in the "Other ENT respiratory infection" category. ENT patients were 51% less likely to be admitted to the ward in 2020 compared to 2019 and 2018 (p = .013).

Conclusion: A significant decrease was observed in the volume of emergency department visits for orofacial and respiratory infections during the COVID-19-pandemic in 2020 compared to the non-COVID periods.

Clinical Relevance: It seems that social distancing, facial mask wearing, and other infection prevention precautions have changed the accustomed patient profile in orofacial and respiratory infections.