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What do systematic reviews say?

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Evidence found and GRADE certainty

3,696 questions · 3,815 findings · 855 reviews

No studies found 573 · 15%GRADE not reported 374 · 9.8%Very low 993 · 26%Low 1,062 · 27.8%Moderate 614 · 16.1%High 199 · 5.2%

Back School vs short‐wave diathermy at the lowest intensity

Duration of sick‐leave Sick‐leave > 21 days · participants with acute or subacute low‐back pain

It is very uncertain whether back school changes duration of sick‐leave Sick‐leave > 21 days compared with short‐wave diathermy at the lowest intensity (very low certainty).

1 finding from 1 review