Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,756 questions · 11,779 findings · 747 reviews · Headline outcomes only

No studies found 3,205 · 27.2%GRADE not reported 628 · 5.3%Very low 3,261 · 27.7%Low 2,913 · 24.7%Moderate 1,453 · 12.3%High 319 · 2.7%

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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

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

Ascaris lumbricoides prevalence · children and adults

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

1 finding from 1 review

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

Trichuris trichiura prevalence · children and adults

Water, sanitation, and hygiene (WASH) intervention showed no clear difference in trichuris trichiura prevalence compared with no WASH intervention (low certainty).

1 finding from 1 review

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

Hookworm prevalence · children and adults

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

1 finding from 1 review