frequently seen in industrialized countries (in Europe and North America) and is rare in underdeveloped countries (1)
even in countries with several ethnic groups, the risk of developing the disease was lower in those with a less westernised way of life (1)
Crohn's & Colitis UK estimate there are at least 115,000 people in the UK with Crohn's disease (3)
annual incidence in the UK is approximately 5/100,000. A GP in UK can expect a new case of Crohn’s disease every seven years (4)
women more affected than men
most commonly affected age group is between 15 and 30 years, although it may be seen in people of any age (4). There is also a second peak in the elderly.
at the time of diagnosis
15% of people are older than 60 years
20-30% are younger than 20 years (4)
familial clustering and involves ulcerative colitis as well as Crohn's disease
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