77-LB: A Retrospective Analysis of the Association between HbA1c and Continuous Glucose Monitor Use for U.S. Patients with Type 2 Diabetes

Abstract

Background: Use of real-time continuous glucose monitoring (rtCGM) reduces HbA1c in individuals with type 2 diabetes (T2D) treated with intensive insulin regimens in randomized clinical trials. However, the effects of CGM use on glycemia in T2D patients in real world settings, particularly those treated with less intensive therapies, has not been well studied. Materials and Methods: This large retrospective, observational analysis utilized data from the Optum Research Database (ORD) to assess the glycemic effects of CGM use (any CGM or real-time CGM [rtCGM]) compared with self-monitoring of blood glucoses (SMBG) within a large T2D population treated with intensive insulin therapy (IIT) and non-intensive therapies (NIT), including basal insulin only, and non-insulin medications. Outcomes were changes from baseline in HbA1c up to 6 months post index date in all patients and by treatment regimen. The percentage of patients who achieved ≥1.0 HbA1c reductions was also assessed. Results: Data from 82,983 eligible patients were assessed (Any CGM, n=1,406; rtCGM, n=148; SMBG, n=81,575). Significant HbA1c reductions were observed with Any CGM (-0.46) and rtCGM (-0.72) vs. SMBG (-0.09), ps < 0.001. HbA1c reductions were significant in CGM vs. SMBG users in the ITT (Any CGM, -0.38%; rtCGM, -0.68%, ps<0.001) and NIT groups (Any CGM, -0.67%, p<0.001, and rtCGM, -0.87, p=0.008). Significantly higher percentages of Any CGM and rtCGM vs. SMBG users achieved ≥1.0 HbA1c reductions in the IIT and NIT groups. Effects of Any CGM and rtCGM were attenuated but remained statistically significant in multivariate adjusted models for the overall T2D cohort. Conclusions: Use of CGM (Any CGM or rtCGM) confers notable benefits in improving glycemic control regardless of therapy regimen. These findings support expanding CGM access to the broader T2D population. Disclosure G. J. Norman: Employee; Self; Dexcom, Inc. M. L. Paudel: None. T. Bancroft: None. P. M. Lynch: Employee; Self; Dexcom, Inc.