A Cochrane systematic review with 53 RCTs of parallel design, with minimum treatment duration of 4 weeks (n = 8,548) concluded that the difference in incidence of adverse events with 5-ASA agents and placebo did not reach statistical significance.
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Colitis and Crohn's Foundation (India) consensus statements on use of 5-aminosalicylic acid in inflammatory bowel disease.
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In another systematic review 5-ASA use was found to be protective for CRC (RR, 0.70; 95% CI, 0.51–0.94) and the effect was dose-dependent; the effect with sulfasalazine was marginally nonsignificant (RR, 0.72; 95% CI, 0.51–1.01) [ 157 ].