Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,973 questions · 3,072 findings · 410 reviews · Headline outcomes only

No studies found 559 · 18.2%GRADE not reported 143 · 4.7%Very low 654 · 21.3%Low 833 · 27.1%Moderate 683 · 22.2%High 200 · 6.5%

Targeted mass media intervention vs general population mass media intervention

Attempts to quit smoking · mass media intervention for promoting healthy behaviours

It is very uncertain whether targeted mass media intervention changes quit‐attempts, 3 months compared with general population mass media intervention (very low certainty).

1 finding from 1 review

Back School vs joint manipulation

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · participants with acute or subacute low‐back pain
2 findings from 1 review

Back School vs combined myofascial therapy and joint manipulation

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · participants with acute or subacute low‐back pain
2 findings from 1 review