INS and type 1 diabetes mellitus: In this cross-sectional survey of 770 adult insulin pump users with type 1 diabetes, which included self-reported and register-derived clinical and psychosocial measures, we found that longer diabetes duration, higher educational attainment, ultra-rapid insulin use, impaired hypoglycemia awareness, higher insulin device satisfaction, and lower diabetes distress were independently associated with lower HbA1c levels.