Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

20 questions · 20 findings · 7 reviews · Headline outcomes only

No studies found 7 · 35%GRADE not reported 0 · 0%Very low 4 · 20%Low 8 · 40%Moderate 1 · 5%High 0 · 0%

Azathioprine or 6‐mercaptopurine vs 5‐aminosalicylic acid (5‐ASA) (mesalazine)

Serious adverse events · people with surgically‐induced remission in Crohn's disease

It is very uncertain whether azathioprine or 6‐mercaptopurine changes serious adverse events compared with 5‐aminosalicylic acid (very low certainty).

1 finding from 1 review