Incidence of inflammatory bowel disease and phenotype at diagnosis in 2011: results of the Epi-IBD 2011 study in the Vigo area.

Objective: to validate the incidence of inflammatory bowel disease (IBD) reported in Vigo in 2010 within the Epi-IBD study, which was the highest incidence reported so far in Spain.

Methods: an epidemiological, prospective, population-based inception cohort study. All incident cases of IBD living in the Vigo area at diagnosis from January 1 to December 31, 2011 were included.

Results: one hundred patients were diagnosed (62 % men; median age, 43.27 years): 49 with ulcerative colitis (UC), 34 with Crohn's disease (CD), and 17 with IBD unclassified (IBDU). The incidence (per 100,000 inhabitants/year) was 17.56 (CD: 5.97; UC: 8.60; IBDU: 2.98), similar to that reported in 2010. The incidence in the non-pediatric population was 19.66 (CD: 6.89, UC: 9.52; IBDU: 3.04). CD and UC phenotype was similar in 2010 and 2011.

Conclusion: this study supports the increased incidence of EII in the Vigo area reported in 2010.