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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Prebiotic vs placebo

Withdrawals due to adverse events · people with mild‐to‐moderate disease (Rachmilewitz index) or active disease (SCCAI score of 4 to 10)

It is very uncertain whether prebiotics changes withdrawals due to adverse events (14 days to 2 or 3 months) compared with placebo (very low certainty).

1 finding from 1 review

Prednisone vs placebo or supportive treatment

Any continuing kidney disease at 3 months (study with high risk of bias excluded) · patients with IgAV

Prednisone showed no clear difference in children with any continuing kidney disease at 3 months compared with placebo or supportive treatment (moderate certainty).

2 findings from 1 review

Prednisone vs placebo or supportive treatment

Any continuing kidney disease at 12 months (study with high risk of bias excluded) · patients with IgAV

Prednisone showed no clear difference in children with any continuing kidney disease at 12 months compared with placebo or supportive treatment (low certainty).

2 findings from 1 review

Pregabalin vs placebo

50% or greater reduction in seizure frequency · people with drug‐resistant focal epilepsy

Pregabalin may leads to higher 50% or greater reduction in seizure frequency ‐ ITT analysis compared with placebo (low certainty).

3 findings from 1 review

Pregabalin vs placebo

Adverse effects: headache · people with drug‐resistant focal epilepsy

It is very uncertain whether pregabalin changes adverse effect: headache compared with placebo (very low certainty).

1 finding from 1 review

Pregabalin vs active comparators

50% or greater reduction in seizure frequency · people with drug‐resistant focal epilepsy

Pregabalin showed no clear difference in 50% or greater reduction in seizurefrequency compared with active comparators (low certainty).

3 findings from 1 review