 The control group will include patients with type 1 diabetes using CSII during 4-6 months before. The patients from this group will be divided in two subgroups, depending on type of self blood glucose control: patients using CSII n20 and SMBG or patients using SAP n20. In this group patients should be transferred to CSII by endocrinologist-specialist in CSII or technical trainer individually and will be monitored by coaching specialist or local endocrinologist within 4 months prior to inclusion. All patients from this group should be educated in intensive diabetes management, including carbohydrate counting, the administration of correction doses of insulin and technical aspects of CSII and self glucose control by continuous glucose monitoring in real-time CGM-RT. 