Comparing Continuous With Flash Glucose Monitoring in Adults With Type 1 Diabetes

The present study wants to compare the Dexcom G6® continuous glucose monitoring (CGM) system (experimental group) with the FreeStyle Libre flash glucose monitoring (FGM) system (control group). The ALERTT1 trial will have three phases: a baseline, study, and extension phase. During the baseline phase, eligible patients will be screened for in‐ and exclusion criteria, wear a blinded Dexcom G6® for 28 days, together with their FreeStyle Libre FGM system, and receive a uniform education moment. In the study phase, patients will be randomized into two groups (1:1): the experimental group will use an unblinded Dexcom G6® CGM for 6 months, the control group will keep using the FreeStyle Libre FGM system for 6 months. Before the 6 month time point is reached, patients in the control group will wear a blinded Dexcom G6® CGM for 28 days, together with their FreeStyle Libre FGM. In the extension phase, patients in the initial control group will start using unblinded Dexcom G6® for 12 months. The initial experimental group will keep using the unblinded Dexcom G6® for the next 12 months.