Incidence of Insulin‐Dependent Diabetes Mellitus (0–29 Years at Onset) in Denmark

Abstract
Incidence data from Denmark on the insulin-dependent diabetes mellitus in the age group 0-29 yr were collected in 2 different geographical areas (West and South Jutland plus Copenhagen and North Zealand). An incidence of 13.3/100,000 per yr (range 12.5-13.6) was registered (N = 792). No difference was found between the 2 areas. The male incidence exceeded the female incidence by 25.4%. The age distribution showed rising values until a peak in the early puberty with a decline until a rather constant level after puberty. From year to year a seasonal variation of onset was demonstrable with maximum in the winter and minimum in the summer for males only. Ascertainment was between 87.7 and 98.6%, and the annual number of new insulin-dependent diabetics in Denmark in the age group 0-29 yr can be calculated to 310-350.