Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,092 questions · 3,199 findings · 339 reviews · Headline outcomes only

No studies found 714 · 22.3%GRADE not reported 181 · 5.7%Very low 695 · 21.7%Low 908 · 28.4%Moderate 568 · 17.8%High 133 · 4.2%

Intervention not reported

Participants with at least 30% or at least 50% reduction in pain · people with cancer pain
1 finding from 1 review

Intervention not reported

PGIC much or very much improved · people with cancer pain
1 finding from 1 review

Intervention not reported

Mean pain intensity at end of study · people with cancer pain
1 finding from 1 review

Intervention not reported

Pain no worse than mild at one or two weeks (or equivalent) · people with cancer pain
1 finding from 1 review

Intervention not reported

Mean quality of life or "well‐being" · people with cancer pain
1 finding from 1 review

Intervention not reported

Participant preference · people with cancer pain
1 finding from 1 review

Intervention not reported

Serious adverse events · people with cancer pain
1 finding from 1 review