Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

40 questions · 40 findings · 16 reviews · Gut

No studies found 7 · 17.5%GRADE not reported 4 · 10%Very low 7 · 17.5%Low 18 · 45%Moderate 4 · 10%High 0 · 0%

Oral iron sulphate vs oral iron hydroxide polymaltose complex

Serious adverse events ‐ active or inactive disease (14 days) · IBD patients

It is very uncertain whether oral iron sulphate changes serious adverse events ‐ active or inactive disease (14 days) compared with oral iron hydroxide polymaltose complex (very low certainty).

1 finding from 1 review

Intervention not reported

Serious adverse events · Patients with active Crohn's disease

The intervention showed no clear difference in serious adverse events (low certainty).

1 finding from 1 review