Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

637 questions · 674 findings · 79 reviews · Gut

No studies found 116 · 17.2%GRADE not reported 14 · 2.1%Very low 133 · 19.7%Low 225 · 33.4%Moderate 145 · 21.5%High 41 · 6.1%

Antibiotics plus probiotics vs placebo or no intervention

Failure to induce clinical remission at end of study · people with active UC

It is very uncertain whether antibiotics plus probiotics changes failure to induce clinical remission at end of study compared with placebo or no intervention (very low certainty).

1 finding from 1 review

Certolizumab pegol vs placebo

Failure to maintain clinical remission at end of study · people with Crohn's disease who responded to CZP remission‐induction treatment

Certolizumab pegol probably leads to lower failure to maintain clinical remission at week 26(1 RCT, 428… compared with placebo (moderate certainty).

1 finding from 1 review

Certolizumab pegol vs placebo

Any severe adverse event during maintenance treatment · people with Crohn's disease who responded to CZP remission‐induction treatment

Certolizumab pegol showed no clear difference in serious adverse events during remission maintenance treatment(1 RCT,… compared with placebo (low certainty).

1 finding from 1 review

Synbiotic vs placebo

Global improvement or treatment success, as defined by primary study · children with chronic constipation without a physical explanation

Synbiotics may leads to higher global improvement or treatment success, as defined by primary study compared with placebo (low certainty).

1 finding from 1 review