Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

12 questions · 12 findings · 2 reviews

No studies found 3 · 25%GRADE not reported 0 · 0%Very low 5 · 41.7%Low 2 · 16.7%Moderate 2 · 16.7%High 0 · 0%

Intranasal corticosteroids vs placebo

Health outcomes Peak expiratory flow readings (higher readings indicate better peak flow) · adults and children > 12 with non‐allergic rhinitis

It is very uncertain whether intranasal corticosteroids changes objective measurement of airflow: peak flow rate (expiratory) compared with placebo (very low certainty).

1 finding from 1 review

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