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2020 ; 41
(9
): 2331-2338
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Frequency and outcome of olfactory impairment and sinonasal involvement in
hospitalized patients with COVID-19
#MMPMID32656713
Jalessi M
; Barati M
; Rohani M
; Amini E
; Ourang A
; Azad Z
; Hosseinzadeh F
; Cavallieri F
; Ghadirpour R
; Valzania F
; Iaccarino C
; Ahmadzadeh A
; Farhadi M
Neurol Sci
2020[Sep]; 41
(9
): 2331-2338
PMID32656713
show ga
BACKGROUND: Olfactory dysfunction has shown to accompany COVID-19. There are
varying data regarding the exact frequency in the various study population. The
outcome of the olfactory impairment is also not clearly defined. OBJECTIVE: To
find the frequency of olfactory impairment and its outcome in hospitalized
patients with positive swab test for COVID-19. METHODS: This is a prospective
descriptive study of 100 hospitalized COVID-19 patients, randomly sampled, from
February to March 2020. Demographics, comorbidities, and laboratory findings were
analyzed according to the olfactory loss or sinonasal symptoms. The olfactory
impairment and sinonasal symptoms were evaluated by 9 Likert scale questions
asked from the patients. RESULTS: Ninety-two patients completed the follow-up
(means 20.1 (± 7.42) days). Twenty-two (23.91%) patients complained of olfactory
loss and in 6 (6.52%) patients olfactory loss was the first symptom of the
disease. The olfactory loss was reported to be completely resolved in all but one
patient. Thirty-nine (42.39%) patients had notable sinonasal symptoms while
rhinorrhea was the first symptom in 3 (3.26%). Fifteen patients (16.3%) had a
taste impairment. Patients with sinonasal symptoms had a lower age (p?=?0.01).
There was no significant relation between olfactory loss and sinonasal symptoms
(p?=?0.07). CONCLUSIONS: Sudden olfactory dysfunction and sinonasal symptoms have
a considerable prevalence in patients with COVID-19. No significant association
was noted between the sinonasal symptoms and the olfactory loss, which may
suggest that other mechanisms beyond upper respiratory tract involvement are
responsible for the olfactory loss.
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