Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,018 questions · 3,100 findings · 369 reviews · Headline outcomes only

No studies found 774 · 25%GRADE not reported 108 · 3.5%Very low 727 · 23.5%Low 840 · 27.1%Moderate 474 · 15.3%High 177 · 5.7%

Targeted mass media intervention vs targeted mass media intervention plus personalised content

Knowledge of nutrition and physical activity guidelines · adult, ethnic minority groups: Latino immigrants, elderly Chinese immigrants, self‐described Americans of African heritage

It is very uncertain whether targeted mass media intervention changes knowledge of nutrition and physical activity guidelines compared with targeted mass media intervention plus personalised content (very low certainty).

1 finding from 1 review

Targeted mass media intervention vs targeted mass media intervention plus personalised content

Adverse effects · adult, ethnic minority groups: Latino immigrants, elderly Chinese immigrants, self‐described Americans of African heritage

The review found no eligible studies for this question.

1 finding from 1 review

Targeted mass media intervention vs targeted mass media intervention plus personalised content

Any outcome considered an adverse effect · adult, ethnic minority groups: Latino immigrants, elderly Chinese immigrants, self‐described Americans of African heritage

The review found no eligible studies for this question.

1 finding from 1 review