Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

415 questions · 425 findings · 30 reviews · Public Health

No studies found 91 · 21.4%GRADE not reported 24 · 5.6%Very low 89 · 20.9%Low 114 · 26.8%Moderate 85 · 20%High 22 · 5.2%

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