Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

79 questions · 86 findings · 34 reviews · Airways

No studies found 6 · 7%GRADE not reported 2 · 2.3%Very low 8 · 9.3%Low 26 · 30.2%Moderate 33 · 38.4%High 11 · 12.8%

Inhaled corticosteroids plus standard care vs placebo or usual care

Resolution of symptoms · adults with a confirmed diagnosis of mild COVID‐19, of whom only 10% (219/2132) participants had received ≥ 1 vaccination

Inhaled corticosteroids plus standard care probably leads to higher symptom resolution: all initial symptoms resolved at day 14 compared with standard care (with or without placebo) (moderate certainty).

1 finding from 1 review

Medical or surgical intervention, or both, for gastro‐oesophageal reflux disease vs nil intervention, delayed intervention control, or placebo

Use of "rescue" medications and emergency action plans: B2 use puffs per day Duration of treatment: range 14 weeks to 24 weeks · treatment for asthma in adults and children with asthma and GORD
1 finding from 1 review

Antibiotics vs placebo or usual care

Serious adverse events Duration 3 days to 3 weeks · acute asthma exacerbation

Antibiotics showed no clear difference in serious adverse events Duration 3 days to 3 weeks compared with placebo or usual care (low certainty).

1 finding from 1 review