Related Experiment Video
Updated: Sep 7, 2025
A Free-breathing fMRI Method to Study Human Olfactory Function
Published on: July 30, 2017
Olfactory function trends in COVID-19 patients: a prospective cohort study
Maryam Akbari1, Mir Mohammad Jalali1, Maliheh Akbarpour1
1Otorhinolaryngology Research Center, Department of Otolaryngology and Head and Neck Surgery, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Background:
One of the most common symptoms in COVID-19 patients is olfactory and taste dysfunction.
Aims/Objectives:
This study aimed to evaluate the olfactory threshold, and identification using objective tests in the Iranian population.
Material And Methods:
The present study was a prospective cohort study conducted in 2020-2021 on clinically recovering COVID-19 patients. Olfactory function was evaluated at the baseline, 4-6 weeks, and 12 weeks later. Olfactory threshold assessment was performed using the Saba Sabalan kit. The Iranian version of the Pennsylvania Smell Identification Test (IR-SIT) was used for olfactory identification. The olfactory threshold was categorized as poor (<8) and good olfaction (≥8).
Results:
In the present study, 111 patients were examined, including 55 men and 56 women (mean age 41.4 and 53.4 years, respectively). The mean olfactory threshold was better for men (7.2) than for women (6.6). Analysis showed age to have a negative relationship with good olfaction at baseline (OR = 0.93, p = .05). Using IR-SIT, only 29.7% had normal olfactory function. Using linear regression, smoking was found to be significantly related to baseline IR-SIT score (adjusted Beta <0.001, p = .03).
Conclusions And Significance:
Objective tests are appropriate methods for assessing olfactory dysfunction in COVID-19 patients. Further studies are recommended.
More Related Videos
04:00Author Spotlight: Assessing the Olfactory Effects of Airborne Pollutants — Buried Food and Social Odor Tests
Published on: September 13, 2024
08:33Olfactory Neurons Obtained through Nasal Biopsy Combined with Laser-Capture Microdissection: A Potential Approach to Study Treatment Response in Mental Disorders
Published on: December 4, 2014
Related Concept Videos
01:03Olfactory Receptors: Location and Structure
01:20Physiology of Smell and Olfactory Pathway
The olfactory...
01:25Olfaction
The olfactory receptors are embedded in the cilia of the...
01:20COPD: Pathogenesis and Clinical Features
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
01:20Sputum Studies II: Culture and Sensitivity
Sputum culture and sensitivity is a medical procedure used to diagnose bacterial infections in the respiratory tract and select the most appropriate antibiotics for treatment. This process involves analyzing sputum samples of thick and opaque secretions produced in the lungs and airways. These samples are collected from patients and then sent to the laboratory for analysis.
The test can identify various pathogens responsible for respiratory infections, including Streptococcus,...
01:27Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies
Medical History