84-LB: Intensification of Glucagon-Like Peptide-1 Receptor Agonists Therapy with Glargine 300 U/mL or IDegLira—The RESTORE-G Real-World Study

Combined use of basal insulin (BI) and glucagon-like peptide 1 receptor agonist (GLP1-RA) deserves consideration for the synergistic effects on glucose profile. Nevertheless, it is unclear if the addition of BI to the ongoing GLP1-RA therapy in free or fixed combination is associated with different outcomes. Aim of this RESTORE-G sub-study was to perform a propensity-score adjusted comparative effectiveness analysis of the two most innovative BIs for intensifying GLP1-RA therapy (±oral agents), i.e. Glargine 300 U/mL in free combination (Gla-300) vs. the fixed ratio combination of insulin degludec + liraglutide (IDegLira). Table shows sample sizes, patients characteristics and effectiveness results.

Compared to IDegLira, Gla-300 group had older age, worse metabolic control, and higher starting BI doses. After 6 months, statistically significant larger FBG reduction and BI dose increase were found in the free vs. fixed combination group. Trends of larger HbA1c and weight reductions with the free combination were also found, without reaching the statistical significance. In conclusion, higher benefits on FBG control in free vs. fixed combination has been found in people uncontrolled on GLP-1 RA, likely due to a better titration of the components. However, inertia in insulin initiation was documented in both groups.