Retrospective Study of the Effectiveness of Olfactory Training in COVID-19 Patients with Olfactory Dysfunction

Objective: Olfactory dysfunction (OD) is a common and distinctive symptom in patients with COVID-19. To date, no standardized treatment for COVID-19-associated OD has been established, but olfactory training (OT) is a promising therapeutic intervention. Previous studies have demonstrated the efficacy of OT in the treatment of postinfectious OD, with several investigations demonstrating the effectiveness of OT in addressing OD associated with COVID-19. In this study, we conducted a retrospective investigation to evaluate the effectiveness of OT and to determine the optimal duration of OT for managing COVID-19-associated OD.