INS and type 1 diabetes mellitus: When comparing the study participants with the hospital sample of patients with type 1 diabetes at Akershus University Hospital, which includes all individuals with type 1 diabetes followed up at Akershus University Hospital, and the national population of patients with type 1 diabetes, which includes all individuals with type 1 diabetes in Norway, the 3 samples were comparable regarding gender, education, insulin administration, HbA1c, age, and diabetes duration (Table 7).