Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,721 questions · 19,640 findings · 2,039 reviews · Headline outcomes only

No studies found 3,754 · 19.1%GRADE not reported 1,273 · 6.5%Very low 4,859 · 24.7%Low 5,568 · 28.4%Moderate 3,240 · 16.5%High 946 · 4.8%

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Intervention not reported

Malaria parasite prevalence · children and adults at risk of malaria

The intervention probably leads to lower malaria parasite prevalence (moderate certainty).

1 finding from 1 review

Intervention not reported

Anaemia prevalence · children and adults at risk of malaria

The intervention leads to lower anaemia prevalence (high certainty).

1 finding from 1 review

Intranasal steroid spray vs placebo or no intervention

Presence of normal olfactory function · people with olfactory dysfunction for less than 4 weeks following COVID‐19 infection

It is very uncertain whether intranasal steroid spray changes presence of normal olfactory function Assessed by participants as a… compared with no intervention/placebo (very low certainty).

2 findings from 1 review

Intranasal steroid drops vs placebo

Presence of normal olfactory function · participants with olfactory dysfunction following COVID‐19 for ≤ 15 days

Intranasal steroid drops showed no clear difference in presence of normal olfactory function Assessed by participants > 4… compared with placebo (low certainty).

1 finding from 1 review

Summary of findings table ‐ LSSS intervention vs regular salt

Blood pressure target achievement · Adults (general population)

It is very uncertain whether summary of findings table ‐ LSSS intervention changes blood pressure control compared with regular salt (very low certainty).

1 finding from 1 review

Continuous vs intermittent bolus (nasogastric and orogastric tube) milk feeding ‐ all preterm infants less than 1500 grams

Necrotising enterocolitis · preterm infants less than 1500 grams

Continuous showed no clear difference in necrotising enterocolitis (NEC) compared with intermittent bolus (nasogastric and orogastric tube) milk feeding ‐… (low certainty).

1 finding from 1 review