Introduction: Insulin therapy of pediatric patients with type 1 diabetes mellitus (T1DM) is highly demanding due to their dynamic growth, development and different daily life activities. Goal: To determine the optimal insulin delivery method for the prevention of hypoglycemia recorded by continuous monitoring of glucose in patients with insulin pump and PEN. Material and Methods: The study included patients up to 18 years of age with diagnosed T1DM and treated with insulin pump and by insulin therapy with PEN at the Pediatric Clinic of the Clinical Center in Sarajevo. The study involved 149 patients, and lasted for 3 years. Patients were divided into two groups: group of patients on insulin pump therapy and group on insulin PEN. Results: There were 73 patients (49.6%) on insulin pump therapy and 79 patients (52.4%) on the insulin PEN therapy. There was no significant difference in the age between genders nor groups with different insulin application methods. There were no significant differences in the number of anamnestic hypoglycemia in patients with a different mode of insulin application (83.56% vs. 81.58%, p=0.114, F=2.533
diabetes mellitus type 1, hypoglycemia, therapy.