The hospital records of 103 patients under 18 years of age with type 1 diabetes mellitus (T1DM) who were followed in the Endocrinology Unit of Eskisehir Osmangazi University Faculty of Medicine between 2010 and 2015 were analyzed of sex, date of diagnosis, admission type at the diagnosis of T1DM, family history of patients with T1DM, serum insulin and C-peptid levels, insulin autoantibodies, islet cell autoantibodies, glutamic acid-decarboxylase autoantibodies, thyroid peroxidase autoantibodies, and tissue transglutaminase autoantibodies. Fifty-three patients were female and 50 male, and the mean age (minimum – maximum) of patients was 9.0 ± 4.4 ( 0.75 – 17) years. The main peak appeared between 11 and 17 years. Thirty-two patients (31.1 %) presented with hyperglycaemia, 27 patients (26.6 %) with ketonemia, 28 patients (27.2 %) with diabetic ketoacidosis, and 16 patients (15.5 %) with diabetic ketoacidosis coma. Twenty-one patients (20.4 %) were associated with infectious diseases. Family history revealed that T1DM and T2DM were diagnosed in patients’ first-degree relatives in seven families (6.8 %) and 23 families (22.3 %), respectively. The frequency of diagnosis showed seasonal variations the lowest in summer and the highest in early spring. All of the autoantibodies related with the diabetes mellitus were negative in 25 (29 %) patients.

Keywords: type 1 diabetes mellitus, epidemiology, Central Anatolia