Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

4,811 questions · 70,850 findings · 5,139 reviews

No studies found 15,174 · 21.4%GRADE not reported 6,479 · 9.1%Very low 17,330 · 24.5%Low 17,814 · 25.1%Moderate 11,056 · 15.6%High 2,997 · 4.2%

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Prebiotic vs placebo

Withdrawals due to adverse events · people with mild‐to‐moderate disease (Rachmilewitz index) or active disease (SCCAI score of 4 to 10)

It is very uncertain whether prebiotics changes withdrawals due to adverse events (14 days to 2 or 3 months) compared with placebo (very low certainty).

1 finding from 1 review

Inulin and oligofructose 15 g vs inulin and oligofructose 7.5 g daily

Clinical remission · Patients with active mild to moderate ulcerative colitis

It is very uncertain whether inulin and oligofructose 15 g changes clinical remission (9 weeks) compared with inulin and oligofructose 7.5 g daily (very low certainty).

1 finding from 1 review

Inulin and oligofructose 15 g vs inulin and oligofructose 7.5 g daily

Clinical improvement (Mayo score) (9 weeks) · Patients with active mild to moderate ulcerative colitis

It is very uncertain whether inulin and oligofructose 15 g changes clinical improvement (Mayo score) (9 weeks) compared with inulin and oligofructose 7.5 g daily (very low certainty).

1 finding from 1 review

Inulin and oligofructose 15 g vs inulin and oligofructose 7.5 g daily

Total adverse events (9 weeks) · Patients with active mild to moderate ulcerative colitis

It is very uncertain whether inulin and oligofructose 15 g changes total adverse events (9 weeks) compared with inulin and oligofructose 7.5 g daily (very low certainty).

1 finding from 1 review

Test‐based attendance vs routine isolation after contact with a SARS‐CoV‐2 positive person

Rates of symptomatic PCR‐positive SARS‐CoV‐2 infection (over 13‐week · school staff

It is very uncertain whether test‐based attendance changes rates of symptomatic PCR‐positive SARS‐CoV‐2 infection (over 13‐week compared with routine isolation after contact with a SARS‐CoV‐2‐positive person (very low certainty).

1 finding from 1 review

Test‐based attendance vs routine isolation after contact with a SARS‐CoV‐2 positive person

Confirmed SARS‐CoV‐2 infection · school staff

It is very uncertain whether test‐based attendance changes rates of any PCR‐positive SARS‐CoV‐2 infection (over 13‐week compared with routine isolation after contact with a SARS‐CoV‐2‐positive person (very low certainty).

1 finding from 1 review

Test‐based attendance vs routine isolation after contact with a SARS‐CoV‐2 positive person

COVID‐related absenteeism from work Days absent per 1000 working days (over 13‐week · school staff

Test‐based attendance showed no clear difference in COVID‐related absenteeism from work Days absent per 1000 working… compared with routine isolation after contact with a SARS‐CoV‐2‐positive person (low certainty).

1 finding from 1 review