Epidemiology of Ulcerative Colitis in Western Norway

Abstract

The incidence of ulcerative colitis (UC) in the three counties that compose Western Norway was registered in a prospective study during the years 1984 and 1985. Both inpatients and outpatients were included. Five hundred and fifty general practitioners and 12 hospitals participated in the study. A total of 239 patients were diagnosed in this area with 807,000 inhabitants, giving a mean annual incidence of 14.8 per 100,000. For patients between 30 and 35 years of age the age-specific incidence rate was 31.2. The M/F sex ratio was 1.10. Familial occurrence of inflammatory bowel disease was found in 11% of the patients. Patients with rectal involvement only constituted 35% of the patients.

Incidence of Inflammatory Bowel Disease in Southeastern Norway: Evaluation of Methods after 1 Year of Registration

“…Age-specific incidence rates of CD per 100,000 inhabitants in the studied population of southeastern Norway in 1990. Consistent with previous studies [4,18] we found a slightly higher male/female ratio for UC and the reverse for CD. The pattern of age-specific incidence rates and the extent of disease at diagnosis are comparable with findings of previous epidemiological studies [1][2][3][4]7], In cases with CD, however, the proportion of disease con fined to the colon is higher than recorded in most other studies [5,18].…”

“…Consistent with previous studies [4,18] we found a slightly higher male/female ratio for UC and the reverse for CD. The pattern of age-specific incidence rates and the extent of disease at diagnosis are comparable with findings of previous epidemiological studies [1][2][3][4]7], In cases with CD, however, the proportion of disease con fined to the colon is higher than recorded in most other studies [5,18]. The validity of our findings is, however, supported by the thorough evaluation of the extent of dis ease at diagnosis: a total colonoscopy was performed on 76% of the patients with CD, while 73% of the patients underwent radiology examinations of the small bowel.…”

“…Recent prospective studies of UC and CD performed in other regions of Norway have shown high incidence rates over 2-3 years: in western Norway 14.8 and 5.3 per 10s inhabitants, respectively, and in northern Norway 12.8 and 5.8 per 105 inhabitants, respectively [4,5], The incidence rates recorded during 1 year of the present study are comparable with the results of these studies, confirming that Norway has one of the highest IBD inci dence rates in the world. Fig.…”

Relationship between clinical parameters and the colitis-colorectal cancer interval in a cohort of patients with colorectal cancer in inflammatory bowel disease

“…The incidence of ulcerative colitis was 14.8/10 5 , 12.8/10 5 , and 13.6/10 5 , respectively [4][5][6]. Diagnosis is made by an endoscopic examination (colonoscopy) with biopsy.…”

The Rates of Incidence and Prevalence of Inflamatory Bowel Diseases in Bolu/Düzce Region: Retrospective Cohort Study Between 2004-2013

“…Diğer yandan, ÜK ve CH' nın insidansında etnik kökenin de etkili olduğu söylenebilir (16). İBH insidansının, Askenazi yahudileri ve Kafkas kökenlilerde daha yüksek, uzakdoğuda ve Güney Afrika bölgesinde daha düşük olması genetik yatkınlığı düşündürse de, insidansın gelişmiş ülkelere göç eden Asyalıların çocuklarında artış göstermesi çevresel etkenlerin de etkili olduğunu göstermektedir (5,9,(17)(18)(19)(20).…”