Olfactory impairment in patients with coronavirus disease 2019 self-perceived as asymptomatic

Olfactory impairment may be present among patients with coronavirus disease 2019 self-perceived as asymptomatic. This study aimed to assess olfactory function among these individuals. A cross-sectional study involving patients with coronavirus disease 2019 self-perceived as asymptomatic was conducte...

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Bibliographic Details
Published in:Journal of laryngology and otology 2023-02, Vol.137 (2), p.174-177
Main Authors: Zahedi, F D, Husain, S, Wan Hamizan, A K, Tuang, G J, Gendeh, H S, Oui, T J, Mustafa, N, Kok, H T
Format: Article
Language:English
Subjects:
Adult
Age
Asymptomatic
Coronaviruses
COVID-19
Cross-Sectional Studies
Diagnosis
Humans
Identification
Likert scale
Main
Main Article
Olfaction
Olfaction Disorders - diagnosis
Perceptions
Personal protective equipment
Questionnaires
Self image
Severe acute respiratory syndrome coronavirus 2
Smell
Surveys and Questionnaires
Viral infections
Young Adult
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Summary:Olfactory impairment may be present among patients with coronavirus disease 2019 self-perceived as asymptomatic. This study aimed to assess olfactory function among these individuals. A cross-sectional study involving patients with coronavirus disease 2019 self-perceived as asymptomatic was conducted. Assessments included the subjective Malaysian Smell and Taste Questionnaire and the culturally adapted Malaysian version of the objective Sniffin' Sticks Identification smell test. In 81 participants (mean age of 31.59 ± 12.04 years), with mean time from diagnosis to smell test of 7.47 ± 3.79 days, subjective assessment showed that 80.2 per cent were asymptomatic (questionnaire score of 6) and 19 per cent had mild symptoms (questionnaire score of 7 and 8). The mean objective smell test score was 10.89 ± 2.11. The prevalence of olfactory impairment was 76.6 per cent among patients with coronavirus disease 2019 self-perceived as asymptomatic. There was no association between the questionnaire and the smell test scores ( = 0.25). There was a correlation between the smell test score and the duration from diagnosis to smell test ( = 0.04). The objective assessment demonstrated that coronavirus disease 2019 patients who perceived themselves as asymptomatic showed olfactory impairment.
ISSN:0022-2151
1748-5460
DOI:10.1017/S0022215121004709