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What do systematic reviews say?

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Evidence found and GRADE certainty

10 questions · 10 findings · 2 reviews

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No studies found 1 · 10%GRADE not reported 0 · 0%Very low 3 · 30%Low 2 · 20%Moderate 1 · 10%High 3 · 30%

Botulinum neurotoxin B vs placebo

Withdrawals due to adverse events · adults with cervical dystonia

Botulinum neurotoxin B showed no clear difference in proportion of withdrawals due to adverse events compared with placebo (low certainty).

1 finding from 1 review

Botulinum neurotoxin B vs placebo

Proportion of participants with adverse events · adults with cervical dystonia

It is very uncertain whether botulinum neurotoxin B changes proportion of participants with adverse events compared with placebo (very low certainty).

1 finding from 1 review

Surgery vs botulinum neurotoxin injections

Treatment success: improvement in the angle of strabismus at 6 months · children with infantile esotropia

It is very uncertain whether surgery changes treatment success: improvement in the angle of strabismus at 6 months compared with botulinum neurotoxin injections (very low certainty).

1 finding from 1 review