Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

277 questions · 281 findings · 52 reviews · Developmental, Psychosocial and Learning Problems

No studies found 54 · 19.2%GRADE not reported 13 · 4.6%Very low 64 · 22.8%Low 71 · 25.3%Moderate 69 · 24.6%High 10 · 3.6%

Fortification of salt with iron and iodine vs fortification of salt with iodine

Anaemia prevalence · participants were of any age or sex and from any country, regardless of baseline iron and iodine status

Fortification of salt with iron and iodine probably leads to lower prevalence of anaemia compared with fortification of salt with iodine (moderate certainty).

1 finding from 1 review

Fortification of salt with iron and iodine vs fortification of salt with iodine

Prevalence of iron deficiency anaemia · participants were of any age or sex and from any country, regardless of baseline iron and iodine status

Fortification of salt with iron and iodine may leads to lower prevalence of iron deficiency anaemia compared with fortification of salt with iodine (low certainty).

1 finding from 1 review

Resilience interventions vs controls

Mental health and well‐being: depressionMeasured by: investigators measured depression using different instruments; lower scores mean lower depression Timing of outcome assessment: post‐intervention · healthcare students, including students in training for health professions delivering direct medical care (e.g. medical students, nursing…
1 finding from 1 review