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Olfactory function trends in COVID-19 patients: a prospective cohort study.
Akbari, Maryam; Jalali, Mir Mohammad; Akbarpour, Maliheh; Alavi Foumani, Ali; Sharifnia, Saeede.
  • Akbari M; Otorhinolaryngology Research Center, Department of Otolaryngology and Head and Neck Surgery, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
  • Jalali MM; Otorhinolaryngology Research Center, Department of Otolaryngology and Head and Neck Surgery, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
  • Akbarpour M; Otorhinolaryngology Research Center, Department of Otolaryngology and Head and Neck Surgery, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
  • Alavi Foumani A; Inflammatory Lung Diseases Research Center, School of Medicine, Guilan University of Medical Sciences, Razi Hospital, Rasht, Iran.
  • Sharifnia S; Otorhinolaryngology Research Center, Department of Otolaryngology and Head and Neck Surgery, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.
Acta Otolaryngol ; 142(6): 515-519, 2022 Jun.
Article in English | MEDLINE | ID: covidwho-1895630
ABSTRACT

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.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 / Olfaction Disorders Type of study: Cohort study / Diagnostic study / Experimental Studies / Observational study / Prognostic study Limits: Adult / Female / Humans / Male / Middle aged Country/Region as subject: Asia Language: English Journal: Acta Otolaryngol Year: 2022 Document Type: Article Affiliation country: 00016489.2022.2085326

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Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 / Olfaction Disorders Type of study: Cohort study / Diagnostic study / Experimental Studies / Observational study / Prognostic study Limits: Adult / Female / Humans / Male / Middle aged Country/Region as subject: Asia Language: English Journal: Acta Otolaryngol Year: 2022 Document Type: Article Affiliation country: 00016489.2022.2085326