Double Dummy Design for Blinding Studies With Automated Insulin Delivery Systems: A Proof of Concept Trial

BACKGROUND: Comparative assessment of therapeutic technologies is often biased due to the inability to blind interventions, especially when therapies differ in form or dosing. While double-dummy design, where participants receive both an active treatment and a matched placebo to maintain blinding, is well established in pharmacological trials, its applicability for medical devices requiring user interaction, such as automated insulin delivery (AID) systems is challenging. METHODS: We present the methodology by which two AID systems are used in a double-dummy, blinded, randomized trial, one system providing insulin therapy and the other, a diluent.Outcomes and conclusion:The study demonstrates the feasibility, of comparing 2 AID systems, without operartor bias.