Identifying Olfactory Phenotypes to Differentiate Between COVID-19 Olfactory Dysfunction and Sinonasal Inflammatory...

Area of Science:

• Neuroscience
• Otolaryngology
• Infectious Disease

Background:

• Olfactory dysfunction (OD) is a common symptom impacting quality of life.
• Differentiating causes of OD, such as post-viral syndromes and sinonasal inflammation, is clinically important.
• Specific olfactory testing can reveal patterns of smell loss.

Purpose of the Study:

• To identify distinct olfactory phenotypes in patients with and without olfactory dysfunction.
• To determine if olfactory patterns can differentiate COVID-19-related OD from sinonasal inflammatory conditions.
• To explore the diagnostic potential of olfactory phenotypes.

Main Methods:

• Adult patients were categorized into four groups: sinonasal inflammatory condition, post-COVID-19 OD, Alzheimer's disease, and healthy controls.
• A novel olfactory testing methodology was employed, with scores normalized.
• Agglomerative hierarchical cluster analysis was performed on normalized data for COVID-19 and sinonasal cohorts.

Main Results:

• Olfactory phenotypes were identified across different patient groups.
• Cluster analysis revealed an 81% sensitivity and 63% specificity in detecting COVID-19-related OD versus sinonasal disease.
• Distinct olfactory patterns suggest a potential to discriminate between these conditions.

Conclusions:

• Specific olfactory phenotypes can differentiate COVID-19-related olfactory dysfunction from sinonasal inflammatory diseases.
• These findings support the use of olfactory phenotypes in the workup and treatment of patients with OD.
• Further research may leverage these phenotypes for improved diagnostic and therapeutic strategies.