Corbellini (2020)
Acute-onset smell and taste disorders in the context of COVID-19: a pilot multicentre polymerase chain reaction based case–control study
10.1111/ene.14273
https://onlinelibrary.wiley.com/doi/full/10.1111/ene.14273
Symptoms
Ageusia (Present vs. Not present)
SARS COV-2 infection
Odds ratio: 4.760 (1.500-14.800) Adjusted model

Spain

Case-control study

Medical records

119

Consecutive patients positive for COVID-19 polymerase chain reaction (cases) and patients positive for influenza polymerase chain reaction (historical control sample) were assessed

The number of men in the COVID-19 group was 48 (60.8%) and in the influenza group 19 (47.5%). Mean age in the COVID-19 group was 61.6 years (SD 17.4) and 61.1 (SD 17.1) in the influenza group. Number of smokers or former smokers was 19in the COVID-19 group (24.1%) and 12 (30%) in the influenza group

Total

3 Day


SARS COV-2 infection

79

COVID-19 polymerase chain reaction (cases)


Symptoms

Ageusia

Taste disorder

Not present

Present


Odds ratio

4.760 (1.500-14.800)

No

Yes

Yes

smoking habit and nasal obstruction


none

Average

No