The percentage of people with Crohn's<unk>  has been determined in Norway and the United States and is similar at 6 to 7.1:100,000. The Crohn's and Colitis Foundation of America cites this number as approx 149:100,000; NIH cites 28 to 199 per 100,000. Crohn's<unk>  is more common in northern countries, and with higher rates still in the northern areas of these countries. The incidence of Crohn's<unk>  is thought to be similar in Europe but lower in Asia and Africa. It also has a higher incidence in Ashkenazi Jews and smokers. Crohn's<unk>  begins most commonly in people in their teens and 20s, and people in their 50s through to their 70s. It is rarely diagnosed in early childhood. It usually affects female children more severely than males. However, only slightly more women than men have Crohn's<unk> . Parents, siblings or children of people with Crohn's<unk>  are 3 to 20 times more likely to develop the<unk> . Twin studies find that if one has the<unk>  there is a 55% chance the other will too. The incidence of Crohn's<unk>  is increasing in Europe and in newly industrialised countries. For example, in Brazil, there has been an annual increase of 11% in the incidence of Crohn's<unk>  since 1990.
medical cause of Peptic ulcer disease
symptoms of Helicobacter pylori
medical cause of Gastritis
symptom of Helicobacter pylori
symptom of Ulcerative colitis
symptom of Small intestine cancer
symptom of Stomach cancer
complications of Helicobacter pylori