Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,808 questions · 8,953 findings · 827 reviews · Headline outcomes only

No studies found 1,891 · 21.1%GRADE not reported 380 · 4.2%Very low 2,100 · 23.5%Low 2,449 · 27.4%Moderate 1,684 · 18.8%High 449 · 5%

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Foam sclerotherapy vs placebo

Complications ‐ DVT · participants with varicose veinsa

It is very uncertain whether foam sclerotherapy changes complications ‐ DVT compared with placebo (very low certainty).

1 finding from 1 review

Foam sclerotherapy vs placebo

Residual varicose veins · participants with varicose veinsa

It is very uncertain whether foam sclerotherapy changes residual varicose veins compared with placebo (very low certainty).

1 finding from 1 review

Antibiotics vs placebo compared

Clinical cure · children, aged 2 to 59 months, with WHO‐defined non‐severe pneumonia and wheeze

Antibiotic therapy showed no clear difference in clinical cure (symptomatic and clinical recovery by the end of… compared with placebo compared to placebo (moderate certainty).

1 finding from 1 review

Antibiotics vs placebo compared

Treatment failure (development of more severe signs and symptoms by the end of treatment) · children, aged 2 to 59 months, with WHO‐defined non‐severe pneumonia and wheeze

Antibiotic therapy may leads to lower treatment failure (development of more severe signs and symptoms by… compared with placebo compared to placebo (low certainty).

1 finding from 1 review

Antibiotics vs placebo compared

Relapse · children, aged 2 to 59 months, with WHO‐defined non‐severe pneumonia and wheeze

Antibiotic therapy showed no clear difference in relapse (children who were 'cured' but developed symptoms within… compared with placebo compared to placebo (low certainty).

1 finding from 1 review