Findings

What do systematic reviews say?

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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%

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Intranasal steroid spray vs placebo or no intervention

Change in sense of smell · people with olfactory dysfunction for less than 4 weeks following COVID‐19 infection
3 findings from 1 review

Intervention not reported

Non‐serious adverse events for all placebos compared with wait‐list or no treatment (Spontaneous reporting of dichotomous outcomes) (Post‐treatment) · patients with mental health disorders

It is very uncertain whether the intervention changes non‐serious adverse events for all placebos compared with wait‐list… (very low certainty).

1 finding from 1 review