5-aminosalicylates prevent relapse of Crohn's disease after surgically induced remission: systematic review and meta-analysis.

Evidence from randomized controlled trials (RCTs) for the use of 5-aminosalicylic acid (5-ASA) drugs in Crohn's disease (CD) in remission after a surgical resection is conflicting. We conducted a systematic review and meta-analysis of RCTs to examine this issue.