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What do systematic reviews say?

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Evidence found and GRADE certainty

3,018 questions · 3,100 findings · 369 reviews · Headline outcomes only

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No studies found 774 · 25%GRADE not reported 108 · 3.5%Very low 727 · 23.5%Low 840 · 27.1%Moderate 474 · 15.3%High 177 · 5.7%

Summary of findings table ‐ Cannabis vs placebo

Spasticity: number of participants reporting reduction of 30% in the spasticity NRS ( · health problem or population

Summary of findings table ‐ Cannabis probably leads to higher spasticity: number of participants reporting reduction of 30% in the… compared with placebo (moderate certainty).

1 finding from 1 review

Summary of findings table ‐ Cannabis vs placebo

Participant‐reported pain relief of 50% or greater · health problem or population

It is very uncertain whether summary of findings table ‐ Cannabis changes pain:number of participants reporting pain relief of 50% or greater… compared with placebo (very low certainty).

1 finding from 1 review

Summary of findings table ‐ Cannabis vs placebo

Patient Global Impression of Change much or very much improved · health problem or population

Summary of findings table ‐ Cannabis probably leads to higher PGIC:number of participants reporting much or very much improvement… compared with placebo (moderate certainty).

1 finding from 1 review

Summary of findings table ‐ Cannabis vs placebo

Specific AEs: number of participants reporting drug tolerance ( · health problem or population

It is very uncertain whether summary of findings table ‐ Cannabis changes specific AEs: number of participants reporting drug tolerance ( compared with placebo (very low certainty).

1 finding from 1 review