Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,730 questions · 18,059 findings · 1,282 reviews

No studies found 4,360 · 24.1%GRADE not reported 2,529 · 14%Very low 4,641 · 25.7%Low 4,007 · 22.2%Moderate 2,057 · 11.4%High 465 · 2.6%

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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

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

Intervention not reported

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 serious adverse events for all placebos compared with wait‐list or… (very low certainty).

1 finding from 1 review