title: Incidence, seasonal and geographical patterns of juvenile-onset insulin-dependent diabetes mellitus in Denmark.
abstract: The incidence, sex, seasonal and geographical patterns of juvenile-onset insulin-dependent diabetes mellitus (j.i.d.m.) were studied retrospectively on one third of the Danish population 1970-1974. The j.i.d.m. incidence remained fairly constant during the study period, the average being 13.2 per 100000 per year. The total number of boys exceeded the number of girls by 27%. A marked peak of incidence was found at 12-14 years, earlier for females than for males. A seasonal variation in onset (diagnosis) of j.i.d.m. was observed with the lowest number of new cases in May-July. The j.i.d.m. incidence seemed to show socioeconomic differences, being highest in those parts of the survey area with lower status.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003718:Denmark; D003922:Diabetes Mellitus, Type 1 / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology*; D005260:Female; D005843:Geography; D006801:Humans; D007223:Infant; D007328:Insulin / Q000627:therapeutic use; D008297:Male; D012621:Seasons; D012737:Sex Factors
chemical_list: D007328:Insulin