Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

3,018 questions · 3,100 findings · 369 reviews · Headline outcomes only

No studies found 774 · 25%GRADE not reported 108 · 3.5%Very low 727 · 23.5%Low 840 · 27.1%Moderate 474 · 15.3%High 177 · 5.7%

Allopurinol vs placebo

Withdrawals due to adverse events · people with chronic gout

Allopurinol showed no clear difference in withdrawal due to adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Allopurinol vs placebo

Serious adverse events · people with chronic gout

Allopurinol showed no clear difference in serious adverse events compared with placebo (moderate certainty).

1 finding from 1 review

Myo‐inositol vs clomiphene

Adverse event ‐ multiple pregnancy · subfertile women with polycystic ovary syndrome

It is very uncertain whether myo‐inositol changes adverse event ‐ multiple pregnancy compared with an ovulation induction agent (clomiphene) (very low certainty).

1 finding from 1 review