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Letter
Randomised placebo-controlled trial of rituximab (anti-CD20) in active ulcerative colitis
  1. Shomron Ben-Horin
  1. Correspondence to Dr Shomron Ben-Horin, Department of Gastroenterology, Sheba Medical Center, Tel-Hashomer, Ramat-Gan 52621, Israel; sben-horin{at}013.net.il

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I read with interest the study by Leiper and colleagues,1 and the authors should be commended for initiating this investigator-driven study. However, I beg to differ with the conclusion that reads ‘Rituximab has no significant effect on inducing remission in moderately active UC [ulcerative colitis] not responding to oral steroids.’

The authors state that the sample-size calculations were based on 80% power for excluding, at p<0.05, an 80% remission rate with active treatment compared with a predicted 25% placebo remission rate …

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