Olfactory and Gustatory Dysfunction in COVID-19: A Global Bibliometric and Visualized Analysis

Ann Otol Rhinol Laryngol. 2023 Feb;132(2):164-172. doi: 10.1177/00034894221082735. Epub 2022 Mar 3.


Objectives: Coronavirus illness (COVID-19) has been found to alter infected people's sense of smell and taste. However, the pathobiology of this virus is not yet known. Therefore, it is critical to investigate the influence of COVID-19 infection on olfactory and gustatory processes. Therefore, we use bibliometric analysis on COVID-19 and olfactory and/or gustatory dysfunction publications to provide studies perspective.

Methods: A bibliometric literature search was performed in the Scopus database. The number and type of publications, countries for publications, institutional sources for publications, journals for publications, citation patterns, and funding agencies were analyzed using Microsoft Excel or VOSviewer. In addition, the VOSviewer 1.6.17 software was used to analyze and visualize hotspots and collaboration patterns between countries.

Results: Scopus has published 187 088 documents for COVID-19 in all study fields at the time of data collection (July 26, 2021). A total of 1740 documents related to olfactory and/or gustatory dysfunction were recovered. The countries most relevant by the number of publications were the United States (n = 362, 20.80%), Italy (n = 255, 14.66%), and the United Kingdom (n = 173, 9.94%). By analyzing the terms in the titles and abstracts, we identified 2 clusters related to olfactory and/or gustatory dysfunction research, which are "diagnosis and test methods" and "prognosis and complications of the disease."

Conclusions: This is the first bibliometric analysis of publications related to COVID-19 and olfactory and/or gustatory dysfunction. This study provides academics and researchers with useful information on the publishing patterns of the most influential publications on COVID-19 and olfactory and/or gustatory dysfunction. Olfactory and/or gustatory dysfunction as indices of suspicion for the empirical diagnosis of coronavirus infection is a new hotspot in this field.

Keywords: COVID-19; Scopus; bibliometric; gustatory; olfactory.

MeSH terms

  • Bibliometrics
  • COVID-19* / complications
  • COVID-19* / epidemiology
  • Humans
  • Olfaction Disorders* / epidemiology
  • Olfaction Disorders* / etiology
  • SARS-CoV-2
  • Smell
  • Taste Disorders / epidemiology
  • Taste Disorders / etiology
  • United States