Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

28 questions · 28 findings · 3 reviews · Gut

No studies found 5 · 17.9%GRADE not reported 0 · 0%Very low 9 · 32.1%Low 13 · 46.4%Moderate 1 · 3.6%High 0 · 0%

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

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

Azathioprine or 6‐mercaptopurine showed no clear difference in adverse events compared with 5‐aminosalicylic acid (low certainty).

1 finding from 1 review

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

Azathioprine or 6‐mercaptopurine vs anti TNF‐ɑ

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 anti TNF‐α (very low certainty).

1 finding from 1 review