Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,183 questions · 2,385 findings · 241 reviews

No studies found 558 · 23.4%GRADE not reported 158 · 6.6%Very low 704 · 29.5%Low 618 · 25.9%Moderate 276 · 11.6%High 71 · 3%

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