The European Collaborative Study Group on Inflammatory Bowel Disease EC-IBD, in a multi-center study, found a proportion of 62.6% with ulcerative colitis, 32.0% with Crohns disease and 7.4% with unclassifiable colitis 7, 11.
El estudio multicéntrico europeo EC-IBD, encontró una proporción de 62,6% con colitis ulcerativa, 32,0% con enfermedad de Crohn y 7,4% con colitis no clasificable 7, 11.