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Background/Aims: The incidence of pediatric inflammatory bowel disease (IBD) in Western countries is on the rise. No prospective studies have been conducted on the epidemiology of pediatric IBD in Poland. The aim of the study was to define the characteristics of new pediatric IBD and assess the incidence of new IBD among children in Poland between 2002 and 2004. Methods: Patient records from 24 pediatric gastroenterology centers servicing the whole population of Poland were collected. IBD diagnosis was based on clinical, radiological, endoscopic and histological features. Results: There were 491 new IBD patients, representing an overall incidence of IBD of 2.7 cases/100,000 children/year. The incidence of Crohn’s disease (CD) was 0.6, ulcerative colitis (UC) 1.3, and indeterminate colitis (IC) 0.8. The age-related incidence of IBD was 1.8 in the 0- to 10-year-old age group, rising to 3.7 for the 11- to 18-year age group. Conclusions: The overall incidence of IBD (as well as CD, UC and IC) in Poland is lower than that in Western countries. The relative contribution of UC and IC to the overall IBD incidence is higher in Poland than in most Western countries. These findings may suggest a tendency towards under- or misdiagnosis. Copyright © 2009 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

Limited data are available on the frequency of inflammatory bowel diseases in East European countries. A recent study from Hungary reported an increasing incidence rate for ulcerative colitis (from 1.6 to 11.0) and for Crohn's disease (from 0.4 to 4.7) from 1977 to 2001. A similar trend was seen in Croatia. In contrast, other countries (for example, Czech Republic, Poland, Romania, Slovakia, and Baltic countries) reported low incidence and prevalence rates. This review will discuss the available data on the epidemiology of inflammatory bowel diseases in Eastern Europe, as well as consider the possible factors responsible for the differences seen between countries and epidemiological trends. [ABSTRACT FROM AUTHOR]