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Aim and Objectives: To describe the prevalence and characteristics of olfactory dysfunction (OD) in patients with laboratory-confirmed COVID-19 infection. Materials and Methods: This monocentric study was performed at Chest Diseases Hospital during the COVID-19 pandemic and all patients testing positive for COVID-19 over a 5-month period (April to August 2020) were recruited. Detailed history was elicited from subjects and all patients were inquired about olfactory dysfunction (OD). Patients with olfactory dysfunction were asked to complete olfactory questionnaires based on the short version of the Questionnaire of Olfactory Disorders-Negative Statements (sQOD-NS). Results: 655 patients with mild to moderate COVID-19 infection were included in the study. The prevalence rate of olfactory dysfunction was 18.47% (n = 121) with contribution of 11.60% (n = 76) and 6.87% (n = 45) from anosmia and hyposmia respectively, thereby suggesting olfactory dysfunction to be a significant clinical feature in COVID-19 patients. Males were significantly more affected by olfactory dysfunctions than females. Anosmic patients had significantly reduced sQOD-NS results as compared to hyposmic patients (significant at P < 0.05). The mean duration of OD was 7.7 days (± 4.3) and >90% patients in our study showed resolution within 14 days. Conclusion: The early recognition of olfactory dysfunction should help to screen, identify and thereby quickly isolate mildly symptomatic COVID-19 patients from the general population and the existence of these dysfunctions may well be a prognostic factor in the course of the disease.
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Indian_J_Otolaryngol_Head_Neck_Surg
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Evaluation of Olfactory Acuity in Patients with Coronavirus Disease 2019 (COVID-19)
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