Are There Any Differences in Phenotype or Disease Course Between Familial and Sporadic Cases of Inflammatory Bowel Disease? Results of a Population-Based Follow-Up Study
AIM: To compare phenotype and course of disease between IBD patients with a first-degree relative with IBD and sporadic cases in a population-based cohort followed prospectively for 5 yr.
METHODS: Family history of IBD was registered at diagnosis and after 1 and 5 yr. Phenotype and course of disease were compared between sporadic and familial cases.
RESULTS: Data for 200 patients with CD and 454 with UC were sufficient for analysis. A first-degree relative with IBD was registered in 14.5% of CD patients and 10.1% of UC patients. The concordance for type of disease was 82% and 70% for CD and UC, respectively. No differences between familial and sporadic cases as regards localization and behavior of disease in CD patients or disease extent in UC patients were observed. In CD patients with colonic involvement, those in the familial group were significantly younger at diagnosis than the sporadic cases. No difference in disease severity in CD patients was observed between the familial and sporadic groups. In UC patients relapse was more frequent in familial cases, but no difference was observed in the need for surgery or medical treatment.
CONCLUSIONS: A family history of IBD does not seem to influence phenotype or to be an important prognostic factor for disease course in IBD patients.
(Am J Gastroenterol 2007;102:1955–1963)
Document Type: Research Article
Affiliations: 1: Department of Internal Medicine, Østfold Hospital Moss, Moss, Norway 2: Department of Internal Medicine, Aker University Hospital, Oslo, Norway 3: Department of Internal Medicine, Ullevål University Hospital, Oslo, Norway 4: Medical Department, Rikshospitalet, University of Oslo and EpiGen Akershus University Hospital, Oslo, Norway 5: Department of Gastroenterology, Aker University Hospital and Faculty of Medicine, University of Oslo, Oslo, Norway
Publication date: September 1, 2007