The purpose of this study was to assess patient satisfaction and clinical experience with the t:slim X2 with Control-IQ Technology automated insulin delivery system.


This descriptive study used a retrospective electronic health record review of all individuals trained on the Control-IQ system between December 2019 and April 2022 in one adult endocrinology practice. A total of 99 patients using the Control-IQ system for at least 3 months completed the glucose monitoring satisfaction survey (GMSS). The primary outcome was overall satisfaction with the system as measured by the GMSS. Secondary outcomes included changes in A1C from baseline at 3, 6, and 12 months, the association between GMSS scores and A1C levels, and the use of the system’s sleep activity feature to achieve lower A1C levels.


The overall satisfaction score for patients using the system was 4.0 ± 0.6 (possible score range 1–5). A1C decreased by 0.6% 3 months, 0.7% at 6 months, and 0.8% at 12 months. Participants with A1C levels ≤7% did not experience greater satisfaction compared to those with higher A1C levels.


Participants using the Control-IQ system reported a high rate of overall satisfaction and experienced significant reductions from baseline A1C at 3, 6, and 12 months.

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