Findings

What do systematic reviews say?

Refine by population, intervention, comparison or outcome
More filters
Evidence found and GRADE certainty

4,720 questions · 15,377 findings · 900 reviews

No studies found 3,865 · 25.1%GRADE not reported 2,291 · 14.9%Very low 3,875 · 25.2%Low 3,287 · 21.4%Moderate 1,681 · 10.9%High 378 · 2.5%

Ranked among the 5,000 newest matching findings; add words or filters to narrow the search.

Systemic corticosteroids plus intranasal steroid/mucolytic/decongestant vs no intervention

Psychophysical testing for recovery of sense of smell · adults with olfactory dysfunction for ≥ 4 weeks following COVID‐19 infection

It is very uncertain whether systemic corticosteroids plus intranasal… changes psychophysical testing for recovery of sense of smell compared with no intervention (very low certainty).

1 finding from 1 review

Palmitoylethanolamide and luteolin vs no intervention

Recovery of sense of smell (as · adults with olfactory dysfunction for ≥ 4 weeks following COVID‐19 infection

It is very uncertain whether palmitoylethanolamide and luteolin changes recovery of sense of smell (as compared with no intervention (very low certainty).

1 finding from 1 review

Intranasal steroid spray vs placebo or no intervention

Presence of normal olfactory function · people with olfactory dysfunction for less than 4 weeks following COVID‐19 infection

It is very uncertain whether intranasal steroid spray changes presence of normal olfactory function Assessed by participants as a… compared with no intervention/placebo (very low certainty).

2 findings from 1 review

Intranasal steroid drops vs placebo

Presence of normal olfactory function · participants with olfactory dysfunction following COVID‐19 for ≤ 15 days

Intranasal steroid drops showed no clear difference in presence of normal olfactory function Assessed by participants > 4… compared with placebo (low certainty).

1 finding from 1 review