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What do systematic reviews say?

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Evidence found and GRADE certainty

6 questions · 6 findings · 3 reviews · Headline outcomes only

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No studies found 6 · 100%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Allopurinol vs placebo

Tophus regression · people with chronic gout

The review found no eligible studies for this question.

1 finding from 1 review

Allopurinol vs benzbromarone

Tophus regression ‐ not measured · people with chronic gout

The review found no eligible studies for this question.

1 finding from 1 review

Vitamin C vs allopurinol

Tophus regression · participants with chronic gout and sUA level > 0.36mmol/L

The review found no eligible studies for this question.

1 finding from 1 review