Feasibility and Preliminary Effectiveness of Continuous Glucose Monitoring for Diabetes Prevention

Continuous Glucose Monitors (CGM) automatically capture interstitial glucose levels every 5 minutes, 24 hours/day, allowing users to view their glucose levels in real-time and make informed decisions about how to manage diet, exercise, and medications. While CGMs are a central component in the glucose management of type 1 diabetes and insulin-dependent type 2 diabetes, less is known about the potential value of CGMs for diabetes prevention. The original Diabetes Prevention Program (DPP) demonstrated that 5-7% weight loss - an outcome reliant upon healthful eating and exercise - was more effective than medication in preventing or delaying the onset of T2D; however, subsequent DPP translations have not consistently achieved the same weight loss outcomes. CGM may represent a way to reinforce and incentivize hard-to-make health behavior changes in real-time that are crucial to the more distal (and often elusive) weight loss outcome. This small (n=7) feasibility pilot examined the preliminary effectiveness and acceptability of integrating CGM in a DPP at Scripps Health, a large, non-profit, private insurance-based health system in San Diego, CA. Following a brief introduction to the CGM and target glucose ranges, DPP participants self-inserted and wore the CGM for 2 weeks. Mean time-in-range (70-140 mg/dL) improved from 70.4% to 76.4%, and time \u003e 140 mg/dL decreased from 29.4% to 23.1% during this period. Individual change in time-in-range ranged from -9.7% to + 38.8% (M ∆ = +6.0%). Participants reported high satisfaction with the CGM, but expressed a desire for more education on blood glucose management. Given these findings, a longer-term, randomized controlled trial is planned to investigate whether a CGM-enhanced DPP leads to greater weight loss than DPP alone. This research will also further our understanding of the potential benefit of improved glycemic control for diabetes prevention even among the subset of cases who do not ultimately achieve the targeted weight loss goal. Disclosure A.L. Fortmann: None. A. Bastian: None. S.R.S. Bagsic: None. I. Loupasi: None. K. Luu: None. A.R. Hottinger: None. K.A. Barry: None. M. Ruiz: None. C. Walker: None. A. Philis-Tsimikas: Advisory Panel; Self; Lilly Diabetes, Medtronic, Novo Nordisk A/S, Sanofi. Employee; Spouse/Partner; Ionis Pharmaceuticals, Inc. Research Support; Self; Boehringer Ingelheim Pharmaceuticals, Inc., Dexcom, Inc., Lilly Diabetes, Medtronic, Novo Nordisk A/S, Sanofi. Funding Confidence Foundation; Dexcom, Inc.