title: Crohn's disease in Wales, 1967-1976; an epidemiological survey based on hospital admissions.
abstract: One thousand and ninety-eight patients from Wales were treated in hospital for Crohn's disease between 1967 and 1976, which gave an overall 'period prevalence' for the disease of 40 cases/10(5) of the total population. The data were analysed for each of the 8 counties and for rural as well as urban populations of different sizes. The disease was significantly more common in the urban counties of Gwent and the 3 parts of Glamorgan compared with the remainder of Wales. The highest prevalence was in South Glamorgan (54 cases/10(5)) and the lowest in Dyfed (30/10(5)). There was a relatively small but highly significant difference in the prevalence for urban populations larger than 10 000 (47/10(5)) compared with smaller communities which were chiefly rural (34/10(5)).
mesh_terms: D003424:Crohn Disease / Q000453:epidemiology*; D003430:Cross-Sectional Studies; D006760:Hospitalization; D006801:Humans; D012424:Rural Population; D014505:Urban Population; D014852:Wales