Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

929 questions · 946 findings · 295 reviews · Headline outcomes only

No studies found 150 · 15.9%GRADE not reported 47 · 5%Very low 312 · 33%Low 262 · 27.7%Moderate 138 · 14.6%High 37 · 3.9%

Intervention not reported

Achievement of at least 50% reduction in headache severity Post‐treatment Higher scores indicate more children with reduced headache · children or adolescents with headaches

It is very uncertain whether the intervention changes achievement of at least 50% reduction in headache severity… (very low certainty).

1 finding from 1 review