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 targeted mass media intervention plus personalised content

Intake meeting target from dietary guidelines, 3 months from baseline · 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 intake meeting target from dietary guidelines, 3 months from baseline 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

Changes in dietary composition, 12 months from baseline · adult, ethnic minority groups: Latino immigrants, elderly Chinese immigrants, self‐described Americans of African heritage
1 finding from 1 review

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

Weekly physical activity meeting target from guidelines, 3 months from baseline · 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 weekly physical activity meeting target from guidelines, 3 months… 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

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

Nutrition education intervention for pregnant women vs no intervention or standard care to reduce stunting (height‐for‐age, length at 18 months)

Low birth weight (g) · pregnant women

Nutrition education intervention for pregnant women may leads to higher low birth weight (g) compared with standard care or no intervention, to reduce stunting (low certainty).

1 finding from 1 review