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What do systematic reviews say?

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Evidence found and GRADE certainty

92 questions · 92 findings · 9 reviews · Headline outcomes only

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No studies found 45 · 48.9%GRADE not reported 1 · 1.1%Very low 4 · 4.3%Low 21 · 22.8%Moderate 14 · 15.2%High 7 · 7.6%

Benzbromarone vs allopurinol

Serum urate normalisation ‐ not reported · people with chronic gout

Benzbromarone showed no clear difference in serum urate normalisation compared with allopurinol (moderate certainty).

1 finding from 1 review

Benzbromarone vs allopurinol

Withdrawals due to adverse events · people with chronic gout

Benzbromarone showed no clear difference in withdrawal due to adverse events compared with allopurinol (low certainty).

1 finding from 1 review

Febuxostat 40 mg/day vs allopurinol

Serum uric acid <6.0 mg/dL at final visit · people with chronic gout

Febuxostat 40 mg/day showed no clear difference in serum uric acid <6.0 mg/dL at final visit compared with allopurinol (moderate certainty).

1 finding from 1 review

Febuxostat 40 mg/day vs allopurinol

Withdrawals due to adverse events · people with chronic gout

Febuxostat 40 mg/day showed no clear difference in discontinuations due to adverse events compared with allopurinol (high certainty).

1 finding from 1 review

Febuxostat 80 mg/day vs allopurinol

Serum uric acid <6.0 mg/dL at final visit · people with chronic gout

Febuxostat 80 mg/day may leads to higher serum uric acid <6.0 mg/dL at final visit compared with allopurinol (low certainty).

1 finding from 1 review