An indirect comparison of HbA1c treatment effect with albiglutide and exenatide 2.0 mg QW using the Bucher method

Efficacy of tirzepatide 5, 10 and 15 mg versus semaglutide 2 mg in patients with type 2 diabetes: An adjusted indirect treatment comparison

AIM

To conduct an adjusted indirect treatment comparison (aITC) of the efficacy of tirzepatide 5/10/15 mg versus semaglutide 2 mg in patients with type 2 diabetes.

MATERIALS AND METHODS

The primary analysis was a Bucher aITC of the change from baseline at week 40 in HbA1c (%) and body weight (kg). Aggregate data from the SURPASS-2 study that met the HbA1c inclusion criterion of the SUSTAIN FORTE study and from SUSTAIN FORTE metformin-only treated patients were used for primary analysis.

RESULTS

The SURPASS-2 refined population comprised 238/245/240 and 240 participants for tirzepatide 5/10/15 mg and semaglutide 1 mg, respectively. The SUSTAIN FORTE metformin-only population comprised 222 and 227 participants for semaglutide 1 and 2 mg, respectively. In this aITC, tirzepatide 10 and 15 mg significantly reduced HbA1c versus semaglutide 2 mg with an estimated treatment difference (ETD) of -0.36% (95% confidence interval [CI] -0.63, -0.09) and -0.4% (95% CI -0.67, -0.13), respectively. Tirzepatide 10 and 15 mg significantly reduced body weight versus semaglutide 2 mg with an ETD of -3.15 kg (95% CI -4.84, -1.46) and -5.15 kg (95% CI -6.85, -3.45), respectively. There were no significant differences between tirzepatide 5 mg and semaglutide 2 mg on change from baseline in HbA1c and body weight.

CONCLUSIONS

In this aITC, HbA1c and weight reductions were significantly greater for tirzepatide 10 and 15 mg versus semaglutide 2 mg and were similar for tirzepatide 5 mg versus semaglutide 2 mg. These findings provide comparative effectiveness insights in the absence of a head-to-head clinical trial.

Comparative Effectiveness of Long-Acting GLP-1 Receptor Agonists in Type 2 Diabetes: A Short Review on the Emerging Data

Glucagon-like peptide-1 (GLP-1) receptor agonists have been available as glucose-lowering therapies for people with type 2 diabetes since 2006, when twice-daily exenatide was licenced. Since then, advances in peptide chemistry and delivery have allowed for once-daily and more recently once-weekly (QW) delivery of peptides in this class and there are currently three QW "long-acting" GLP-1 receptor agonists available in clinical practice. This short review describes the therapeutic landscape that is occupied by the modern type 2 diabetes glucose-lowering therapies with a particular focus on long-acting GLP-1 receptor agonists. The efficacy and side-effect profiles of the available QW GLP-1 receptor agonists are discussed, focusing on head-to-head clinical trial comparisons. There is also an appraisal of the cardiovascular outcome trials, for which there has been an assessment of each of the QW GLP-1 receptor agonists, leading to clinical conclusions regarding their comparative effectiveness.