AIM: To evaluate the incidence of @entity30 in Stockholm County between 1955 and 1989. METHODS: A cohort of 1936 @entity1 with @entity30 was retrospectively assembled. Incidence rates and changes in disease distribution were assessed. RESULTS: The mean increase in incidence was 15% (95% confidence intervals 12% to 18%) per five year period with a mean annual incidence rate at 4.6/10(5) during the last two decades. The mean incidence for the entire study period was similar for @entity1 and @entity1 . The mean age at diagnosis increased from 25 years in 1960-64 to 32 years in 1985-89, partly because of an increasing proportion of @entity1 aged at least 60 years at diagnosis. The proportion of @entity1 with @entity30 at the time of diagnosis increased from 15% to 32% (17% difference; 95% confidence intervals 12% to 23%) whereas the proportion of @entity1 with @entity66 decreased from 58% to 41% (17% difference; 95% confidence intervals 10% to 24%) during the study period. Elderly @entity1 had a higher proportion of @entity29 and a lower proportion of @entity66 compared with the younger @entity1 . CONCLUSION: The incidence rate of @entity30 in Stockholm has stabilised at 4.6/10(5) and the proportion of elderly @entity1 has increased during a 35 year period. Colonic @entity30 has increased in frequency with a reciprocal decrease in @entity66 .

Incidence of XXXX in Stockholm County 1955-1989.

@entity1 :: ('9606', 'Species') :: ['women', 'patients', 'men'] @entity30 :: ('MESH:D003424', 'Disease') :: ["colonic Crohn's disease", "Crohn's disease"] @entity66 :: ('MESH:D004194', 'Disease') :: ['ileocolonic disease', 'ileocaecal disease'] @entity29 :: ('MESH:D015212', 'Disease') :: ['small bowel disease']
@entity30 :: (MESH:D003424,Disease) :: ['Crohn's disease']
