Crohn's disease in Northern Ireland--a retrospective study of 440 cases.

Abstract The incidence of Crohn's disease in the community is thought to be changing, with conflicting evidence for increases, decreases or steady state situations being described. A retrospective study, using strict criteria for diagnosis, for a 16 year period in Northern Ireland demonstrated an increasing incidence of Crohn's disease, with a distribution in the population similar to that described in previous studies.