Automated insulin delivery systems, also known as closed-loop systems, have shown to improve TIR, TAR, and TBR compared with insulin pump and CGM systems that cannot automatically dose insulin. Only few studies have described long-term use of AID systems over several years. Real-world studies suggest that the beneficial effects of AID systems on glycemic outcomes are sustained over time; however, a modest increase in body weight has been observed in some users, raising concerns about the metabolic trade-offs of improved glycemia. We aim to explore wether the improvements in glycemic outcomes and treatment satisfaction achieved with AID systems remain stable over multiple years, and secondly, if long-term treatment with AID systems may be associated with an increase in body weight.

40 participants, who have completed the Steno780G trial, will be invited to attend a follow-up visit at Steno Diabetes Center Copenhagen between 3.5 - 4.5 years after start of AID treatment to assess the long-term effects of the MiniMed 780G system.

Inclusion Criteria:

• Previous participation in the Steno780G study

Exclusion Criteria:

• Lack of compliance with key study procedures at the discretion of the investigator.

Study participants who have previously participated in the Steno780G study will be invited for a follow-up visit

Might be available on request