Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,005 questions · 1,053 findings · 151 reviews · Headline outcomes only

No studies found 275 · 26.1%GRADE not reported 150 · 14.2%Very low 271 · 25.7%Low 215 · 20.4%Moderate 105 · 10%High 37 · 3.5%

Water, sanitation, and hygiene (WASH) intervention vs no WASH intervention

Any STH prevalence · children and adults

Water, sanitation, and hygiene (WASH) intervention showed no clear difference in any STH prevalence compared with no WASH intervention (moderate certainty).

1 finding from 1 review

Any intermittent iron regimen (with or without other vitamins and minerals) vs daily regimen (with same vitamins and minerals)‐maternal outcomes

Participants with at least some Side Effects · Women receiving supplements in pregnancy

It is very uncertain whether any intermittent iron regimen (with or without other vitamins and… changes side effects (any reported throughout intervention period) compared with daily regimen (with same vitamins and minerals)‐maternal outcomes (very low certainty).

1 finding from 1 review

Psychosocial interventions vs control

Acceptability ‐ total dropouts · adults (aged 18 and older) exposed to a traumatic event

It is very uncertain whether psychosocial interventions changes dropouts for any reason at endpoint compared with control (very low certainty).

1 finding from 1 review