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. 2015 Sep 22;2015(9):CD008655. doi: 10.1002/14651858.CD008655.pub3

Summary of findings 2. Rituximab versus placebo.

Rituximab versus placebo
Patient or population: patients with active ulcerative colitis
 Settings: Outpatient
 Intervention: Rituximab versus placebo
Outcomes Illustrative comparative risks* (95% CI) Relative effect
 (95% CI) No of Participants
 (studies) Quality of the evidence
 (GRADE) Comments
Assumed risk Corresponding risk
Control Rituximabversus placebo
IBDQ at week 12 The mean IBDQ change score in the placebo group was 2 The mean IBDQ score in the intervention group was 15 points higher   22
 (1 study) ⊕⊝⊝⊝
 very low1, 2  
*The basis for the assumed risk (e.g. the median control group risk across studies) is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
 CI: Confidence interval; RR: Risk ratio;
GRADE Working Group grades of evidence
 High quality: Further research is very unlikely to change our confidence in the estimate of effect.
 Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
 Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
 Very low quality: We are very uncertain about the estimate.

1 Downgraded two levels due to small sample size (24 participants)

2 Downgraded one level due to high risk of bias