Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

767 questions · 780 findings · 55 reviews · Public Health

No studies found 162 · 20.8%GRADE not reported 52 · 6.7%Very low 231 · 29.6%Low 191 · 24.5%Moderate 122 · 15.6%High 22 · 2.8%

Intervention not reported

Anaemia Defined as haemoglobin (Hb) concentration < 11 g/dL Measured at after 6 months and 6 ‐ 12 months of intervention · General population

The intervention may leads to lower anaemia Defined as haemoglobin (Hb) concentration < 11 g/dL Measured… (low certainty).

1 finding from 1 review

Intervention not reported

Anaemia Anaemia was defined as a haemoglobin (Hb) concentration < 13 g/dL for boys and < 12 g/dL for girls Measured after 9 months of intervention · General population

It is very uncertain whether the intervention changes anaemia Anaemia was defined as a haemoglobin (Hb) concentration < 13… (very low certainty).

1 finding from 1 review

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

Birth length · pregnant women

Zinc supplementation in pregnant women showed no clear difference in length (cm) at birth compared with supplementation without zinc or placebo to reduce stunting (moderate certainty).

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

Nutrition systems strengthening interventions targeting children vs no intervention or standard care to reduce stunting (height‐for‐age, length at 18 months)

Mean height‐for‐age z‐score · children under 5 years old

Nutrition systems strengthening interventions targeting children may leads to higher height‐for‐age (z‐score) at 18 months compared with no intervention or standard care to reduce stunting (height‐for‐age,… (low certainty).

1 finding from 1 review