Introduction. Type 1 diabetes belongs to the most common chronic conditions among children and adolescents. Continuous subcutaneous insulin infusion, or insulin pump therapy, mimics a physiological daily rhythm of insulin secretion by the pancreas. Aim of the study. The aim of this study was to analyze the influence of selected factors on the course of therapy with continuous subcutaneous insulin infusion performed using personal insulin pumps in children and adolescents with type 1 diabetes. Material and methods. We analyzed the diabetic observation charts of 131 patients of the Outpatient Clinic of Diabetes at the Specialist Clinic for Children and Teenagers, the Independent Public Clinical Hospital no. 1 in Szczecin. Results. Glycated hemoglobin (HbA1c) values were compared every three months during a three-year observation. Significant differences were observed in the HbA1c values between the first and every consecutive measurement. Analysis of the data demonstrated statistically significant differences (p=0.013) between the mean age of the patients with episodes of diabetic ketoacidosis in the last year and the mean age of the patients without such episodes. There was a statistically significant relationship (p=0.000) between the self-controlled mean glycemia values Słowa kluczowe cukrzyca typu 1, ciągły podskórny wlew insuliny, osobista pompa insulinowa, dzieci, młodzież