Clinical factors influencing olfactory performance in patients with persistent COVID-19 smell loss longer than 1 year.

In our study, sVAS was confirmed to be an easy and quick tool to assess olfaction and to discriminate between normal and reduced sense of smell as demonstrated by a moderate correlation with all the S'S scores and a highly significant difference in the sVAS results between normosmics and dysosmics with a small effect size ( p = .0008; d = −0.34).

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