ArticleInternational journal of environmental research and public health2022
Olfactory Dysfunction in COVID-19 Patients Who Do Not Report Olfactory Symptoms: A Pilot Study with Some Suggestions for Dentists.
Article in International journal of environmental research and public health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Subjective distress mediates the association between olfactory dysfunction duration and depression in post COVID 19 patients.Scientific reports · 2025Article
- Long-term self-reported symptoms and psychophysical tests in COVID-19 subjects experiencing persistent olfactory dysfunction: a 4-year follow-up study.Frontiers in neural circuits · 2025Article
- Subjective versus Psychophysical Measures of Chemosensory Alterations following COVID-19.ORL; journal for oto-rhino-laryngology and its related specialties · 2024Article
- MRI evidence of olfactory system alterations in patients with COVID-19 and neurological symptoms.Journal of neurology · 2023Observational
- Measuring Nasal Patency and the Sense of Smell in CRSwNP Patients Treated with Dupilumab.Journal of personalized medicine · 2023Article
- Relationship between tinnitus and olfactory dysfunction: audiovisual, olfactory, and medical examinations.Frontiers in public health · 2023Article
- Validation of the Olfato-UP olfactory test for the Brazilian population.Brazilian journal of otorhinolaryngologyArticle
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8 authors.
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Abstract
backgroundSmell and taste dysfunction are frequently reported by SARS-CoV-2 positive patients. The degree of olfactory and gustatory dysfunction varies from a very mild reduction to their complete loss. Several studies have been performed to determine their prevalence in COVID-19 patients, mostly using subjective measurement methods. The literature lacks long-term studies regarding duration and recovery.
methodsWe assessed olfactory performance, using the Sniffin' Sticks olfactory test, in a group of patients who had not reported olfactory dysfunction, around 131 days after their COVID-19 diagnosis.
results11 out of 20 subjects showed no olfactory reduction (65%), while 9 subjects showed reduced TDI score (45%). A total of 13 subjects (65%) scored above the cutoff point for Threshold, 16 subjects (80%) scored above the cutoff point for discrimination and 13 subjects (65%) scored above the cutoff point for identification.
conclusionObjective measurement methods of olfactory performance show a higher prevalence of olfactory reduction compared to patients' self-reported questionnaires. Olfactory dysfunction can last even months after its onset and because of its high prevalence, it could be a screening symptom for suspect COVID-19 cases.
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