Abstract
A material is presented of 222 patients with ulcerative colitis, who on admission to hospital during the 5-year period 1960-65 were permanent residents in the county district of Copenhagen or the municipality of Gentofte, the population of which was used as a control material. This material was divided into 21 socio-economic groups. It is shown with statistical significance that within the two socio-economic groups 'civil servants + salaried grades', and 'wage-earners', the patients were found at a relatively higher educational and economic level. The distribution on the other socio-economic groups was the same as in the control material.