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?:abstract
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Introduction: Chemosensory loss is a common symptom of coronavirus disease 2019 (COVID-19) and has been associated with a milder clinical course in younger patients Whereas several studies have confirmed this association, knowledge about the improvement and recovery of olfactory and gustatory loss is lacking The aim of this study was to investigate the temporal dynamics of improvement and recovery from sudden olfactory and gustatory loss in patients with confirmed and suspected COVID-19 Methods: Subjective chemosensory function, symptoms of COVID-19, COVID-19 tests results, demographics and medical history were collected through a questionnaire Results: Among the 109 study participants, 95 had a combined olfactory and gustatory loss, five participants had isolated olfactory loss and nine participants has isolated taste loss The mean age of participants was 39 4 years and 25% of participants were under the age of 30 years Young age was not associated with a higher recovery rate After a mean time of > 30 days since the chemosensory loss, participants reported relatively low recovery and improvement rates For participants with olfactory loss, only 44% had fully recovered, whereas 28% had not yet experienced any improvement of symptoms After gustatory loss, 50% had fully recovered, whereas 20% had not yet experienced any improvement Olfactory and gustatory deficits were predominantly quantitative and mainly included complete loss of both olfactory and gustatory function Conclusions: Chemosensory loss was frequent in young individuals and persisted beyond a month after symptom onset, often without any improvement during this time Funding: The author wishes to acknowledge research salary funding from Arla Foods (Viby, Denmark) and the Central Region Denmark The sponsors had no say, roles or responsibilities in relation to the study, including (but not limited to) the study design, data collection, management and analysis Trial registration: not relevant
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