Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,245 questions · 1,274 findings · 321 reviews

No studies found 247 · 19.4%GRADE not reported 195 · 15.3%Very low 372 · 29.2%Low 282 · 22.1%Moderate 141 · 11.1%High 37 · 2.9%

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