Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

203 questions · 213 findings · 12 reviews · Public Health

No studies found 39 · 18.3%GRADE not reported 6 · 2.8%Very low 53 · 24.9%Low 65 · 30.5%Moderate 33 · 15.5%High 17 · 8%

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