Type 2 & other diabetes

Relationship between body weight change and glycaemic control with tirzepatide treatment in people with type 2 diabetes: A post hoc assessment of the SURPASS clinical trial programme

Diabetes Obes MetabPublished Post hoc analysis of the SURPASS randomised trial programme

Authors' conclusion

In this post hoc analysis, consistent reductions in both HbA1c and body weight were observed in most participants treated with tirzepatide at doses of 5, 10 or 15 mg. A statistically significant but modest association between HbA1c and body weight change was observed in SURPASS-2, SURPASS-3 and SURPASS-4, suggesting that both weight-independent and weight-dependent mechanisms are responsible for the tirzepatide-induced improvement in glycaemic control.

Study context

Population
People with T2D treated with tirzepatide in SURPASS-1 to −5
Comparison
Tirzepatide 5, 10 or 15 mg: relationship between HbA1c and body weight change
Primary endpoint
Relationship between HbA1c and body weight reductions
Follow-up
40 weeks (SURPASS-1, −2, −5); 52 weeks (SURPASS-3, −4)
Methodological detailsanalysed by trial
  • Analysed by trial

Primary result

As reported in the abstract

HbA1c reduction from baseline (range across trials)

Tirzepatide 5 mg

96%-99%

Tirzepatide 10 mg

98%-99%

Tirzepatide 15 mg

94%-99%

Significant associations between HbA1c and body weight changes in SURPASS-2, −3, −4 (all doses) and −5 (5 mg only); correlation coefficients across studies
0.1438 to 0.3130; P ≤ .038

Further findings

OutcomeTirzepatide 5 mgTirzepatide 10 mgTirzepatide 15 mg
Weight loss associated with HbA1c reduction (range across trials)87%-94%88%-95%88%-97%

Original publication

Relationship between body weight change and glycaemic control with tirzepatide treatment in people with type 2 diabetes: A post hoc assessment of the SURPASS clinical trial programme. Diabetes Obes Metab. Published 29 May 2023. doi:10.1111/dom.15140

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