Change in Hemoglobin A1c and Quality of Life with Real-Time Continuous Glucose Monitoring Use by People with Insulin-Treated Diabetes in the Landmark Study

Authors: Timothy Gilbert, Adam Noar, Olivia Blalock, William Polonsky

Abstract

Background: Initiating continuous glucose monitoring (CGM) can affect hemoglobin A1c (HbA1c) levels and patients’ relationship with their diabetes. We used real-world HbA1c data to quantify short-term changes in glycemia and validated psychosocial questionnaires to assess changes in quality-of-life indicators in people during their first few months of CGM use. Methods: Eligibility was assessed during calls to Dexcom sales regarding its G6 CGM System. Eligibility criteria included ages 25-65 years, type 1 (T1D) or type 2 diabetes (T2D) on intensive insulin therapy (IIT), and no prior CGM use. Participants used a web-based portal to complete the 17-item Diabetes Distress Scale (DDS) and the 14-item Hypoglycemia Attitudes and Behavior Scale (HABS); provided validated HbA1c measurements; and shared their CGM data pre- and 3-5 months post-CGM initiation. Satisfaction and ease of use with the G6 System were also assessed. Results: Data were available from 248 patients (182 with T1D, 66 with T2D; 57% male, 88% non-Hispanic white). Mean (standard deviation) HbA1c fell significantly from 8.2% (1.9%) at baseline to 7.1% (1.1%) at the end of the study (P < 0.001); more than half (54.4%) of those with initial HbA1c values >7% experienced absolute HbA1c reductions of >1%. Significant reductions in diabetes distress (DDS) and hypoglycemic concerns (HABS) were observed (P < 0.001). Most (93%) participants were satisfied or very satisfied with the G6 System and 73% found it very easy to use. Conclusions: The first 3 months of CGM use was correlated with improvements in psychosocial outcomes and improved HbA1c levels for people with T1D or T2D who use IIT.

Source: https://pubmed.ncbi.nlm.nih.gov/33470882/

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BDI Monthly Events

March 12Case Consultation Meeting
March 12: BDI hosts the San Diego-wide, monthly case consultation meeting (for mental health professionals working in the field of diabetes). Contact us at [email protected] if you are in the greater San Diego area and would like further information about this program.
March 19-22International Conference
18th International Conference for ATTD (Advanced Technologies and Treatments for Diabetes) in Amsterdam, Dr. Polonsky (BDI President) has three presentations.
March 19Type 2 Presentation
On March 19, Dr. Polonski will present CGM is Wonderful, But… at the Roche-sponsored symposium, “Translating the Power of Prediction into Diabetes Management”, and Insulin Therapy Experience: Considering the Needs of People Living with Diabetes (with Professor Cukierman-Yaffe) at the Sanofi-sponsored symposium, Confidence and Simplicity in Diabetes Management”. https://attd.kenes.com/
March 20Type 2 Presentation
On March 20, Dr. Polonski will present Improved Patient- and Physician-Reported Outcomes with IGlarLixi When Switching From Premixed Insulin in People with Type 2 Diabetes: The Soli-Switch Study. https://cslide.ctimeetingtech.com/attd25/attendee/confcal/session/calendar/2025-03-20