Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

311 questions · 322 findings · 24 reviews · Headline outcomes only

No studies found 78 · 24.2%GRADE not reported 12 · 3.7%Very low 76 · 23.6%Low 76 · 23.6%Moderate 65 · 20.2%High 15 · 4.7%

Intervention not reported

Post hoc exploratory endpoint: Exacerbation requiring hospitalisation/ED/OCS (rate ratio) · children and adults with asthma

The intervention may leads to lower post hoc exploratory endpoint: Exacerbation requiring… (low certainty).

1 finding from 1 review

Anti‐IL13 or anti‐IL4 agents vs placebo

Rate of exacerbations requiring systemic corticosteroids · people with asthma

Anti‐IL13 or anti‐IL4 agents showed no clear difference in exacerbation requiring OCS (rate ratio) compared with placebo (low certainty).

1 finding from 1 review

Brain‐derived neurotrophic factor vs placebo

Death or disability after 12 months · patients with Guillain‐Barré syndrome

It is very uncertain whether brain‐derived neurotrophic factor changes death or disability after 12 months compared with placebo (very low certainty).

1 finding from 1 review

Brain‐derived neurotrophic factor vs placebo

Participants with 1 or more serious adverse events · patients with Guillain‐Barré syndrome

It is very uncertain whether brain‐derived neurotrophic factor changes participants with 1 or more serious adverse events compared with placebo (very low certainty).

1 finding from 1 review

Cerebrospinal fluid filtration vs plasma exchange

Improvement in disability grade Defined as achievement of a specified degree of improvement · patients with Guillain‐Barré syndrome

It is very uncertain whether cerebrospinal fluid filtration changes improvement in disability grade Defined as achievement of a… compared with plasma exchange (very low certainty).

1 finding from 1 review