Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

78 questions · 82 findings · 6 reviews · Gut

No studies found 3 · 3.7%GRADE not reported 1 · 1.2%Very low 41 · 50%Low 19 · 23.2%Moderate 18 · 22%High 0 · 0%

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

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

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

1 finding from 1 review

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

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

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

1 finding from 1 review

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 5‐aminosalicylic acid (5‐ASA) (mesalazine)

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

Azathioprine or 6‐mercaptopurine may leads to higher withdrawal due to adverse events compared with 5‐aminosalicylic acid (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

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