Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,511 questions · 2,668 findings · 290 reviews

No studies found 743 · 27.8%GRADE not reported 329 · 12.3%Very low 775 · 29%Low 484 · 18.1%Moderate 279 · 10.5%High 58 · 2.2%

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

Azathioprine or 6‐mercaptopurine vs anti TNF‐ɑ

Withdrawals due to adverse events · people with surgically‐induced remission in Crohn's disease

Azathioprine or 6‐mercaptopurine showed no clear difference in withdrawal due to adverse events compared with anti TNF‐α (low certainty).

1 finding from 1 review

Azathioprine or 6‐mercaptopurine vs placebo

Withdrawals due to adverse events · people with surgically‐induced remission in Crohn's disease

Azathioprine or 6‐mercaptopurine showed no clear difference in withdrawal due to adverse events compared with placebo (moderate certainty).

1 finding from 1 review

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

Clinical relapse · people with surgically‐induced remission in Crohn's disease

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

1 finding from 1 review

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

Endoscopic relapse · people with surgically‐induced remission in Crohn's disease

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

1 finding from 1 review