Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,733 questions · 1,794 findings · 326 reviews · Headline outcomes only

No studies found 243 · 13.5%GRADE not reported 96 · 5.4%Very low 597 · 33.3%Low 506 · 28.2%Moderate 303 · 16.9%High 49 · 2.7%

Combination of anticholinergics + beta2‐agonists vs B2‐agonists alone

Asthma clinical scores · children hospitalised with an acute asthma exacerbation

Combination of anticholinergics + beta2‐agonists showed no clear difference in asthma clinical scores compared with beta2‐agonists alone (moderate certainty).

1 finding from 1 review

Combination of anticholinergics + beta2‐agonists vs B2‐agonists alone

Overall withdrawals · children hospitalised with an acute asthma exacerbation

Combination of anticholinergics + beta2‐agonists showed no clear difference in overall withdrawals compared with beta2‐agonists alone (moderate certainty).

1 finding from 1 review

Intervention not reported

Treatment failure at 1 month or less · patients with acute otitis media

The intervention led to higher treatment failure at 1 month or less; GRADE not reported.

1 finding from 1 review

Intervention not reported

Treatment failure at 8 to 19 days · patients with acute otitis media

The intervention led to higher treatment failure at 8 to 19 days; GRADE not reported.

1 finding from 1 review