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Increasing Incidence and Prevalence of the Inflammatory Bowel Diseases With Time, Based on Systematic Review



Increasing Incidence and Prevalence of the Inflammatory Bowel Diseases With Time, Based on Systematic Review

Natalie A. Molodecky, Ing Shian Soon, Doreen M. Rabi, William A. Ghali, Mollie Ferris, Greg Chernoff, Eric I.Benchimol, Remo Panaccione, Subrata Ghosh, Herman W. Barkema, Gilaad G. Kaplan

Gastroenterology,
142:1, October 17, 2011

Increasing Incidence and Prevalence of the Inflammatory Bowel Diseases With Time, Based on Systematic Review

Background & Aims
We conducted a systematic review to determine changes in the worldwide incidence and prevalence of ulcerative colitis (UC) and Crohn's disease (CD) in different regions and with time.


Methods
We performed a systematic literature search of MEDLINE (1950–2010; 8103 citations) and EMBASE (1980–2010; 4975 citations) to identify studies that were population based, included data that could be used to calculate incidence and prevalence, and reported separate data on UC and/or CD in full manuscripts (n = 260). We evaluated data from 167 studies from Europe (1930–2008), 52 studies from Asia and the Middle East (1950–2008), and 27 studies from North America (1920–2004). Maps were used to present worldwide differences in the incidence and prevalence of inflammatory bowel diseases (IBDs); time trends were determined using joinpoint regression.


Results
The highest annual incidence of UC was 24.3 per 100,000 person-years in Europe, 6.3 per 100,000 person-years in Asia and the Middle East, and 19.2 per 100,000 person-years in North America. The highest annual incidence of CD was 12.7 per 100,000 person-years in Europe, 5.0 person-years in Asia and the Middle East, and 20.2 per 100,000 person-years in North America. The highest reported prevalence values for IBD were in Europe (UC, 505 per 100,000 persons; CD, 322 per 100,000 persons) and North America (UC, 249 per 100,000 persons; CD, 319 per 100,000 persons). In time-trend analyses, 75% of CD studies and 60% of UC studies had an increasing incidence of statistical significance (P < .05).


Conclusions
Although there are few epidemiologic data from developing countries, the incidence and prevalence of IBD are increasing with time and in different regions around the world, indicating its emergence as a global disease.







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Prepared by: Dr. Houssam Al-Nahhas






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