Type 2 & other diabetes

Tirzepatide versus insulin glargine as second-line or third-line therapy in type 2 diabetes in the Asia-Pacific region: the SURPASS-AP-Combo trial

Nat MedPublished Randomised controlled trial

Authors' conclusion

Tirzepatide demonstrated superior reductions in HbA1c versus insulin glargine in an Asia-Pacific, predominately Chinese, population with T2D and was generally well tolerated.

Study context

Population
Insulin-naive adults (≥18 years) with T2D uncontrolled on metformin (± SU), 66 hospitals in China, South Korea, Australia and India763 (83.2%) in China
Participants
917 adults
Comparison
Weekly tirzepatide 5, 10 or 15 mg vs daily insulin glargine
  • Tirzepatide 5 mgn = 230
  • Tirzepatide 10 mgn = 228
  • Tirzepatide 15 mgn = 229
  • Insulin glarginen = 230reference
Primary endpoint
Non-inferiority of mean change in HbA1c from baseline with tirzepatide 10 mg and 15 mg
Follow-up
Week 40
Methodological detailsphase 3, open-label, non-inferiority, multicentre
  • Phase 3
  • Open-label
  • Non-inferiority
  • Multicentre

Primary result

As reported in the abstract

Least squares mean (SE) change in HbA1c · baseline to week 40

Tirzepatide 5 mg

−2.24

least squares mean · SE 0.07 · %

Tirzepatide 10 mg

−2.44

least squares mean · SE 0.07 · %

Tirzepatide 15 mg

−2.49

least squares mean · SE 0.07 · %

Insulin glargine

−0.95

least squares mean · SE 0.07 · %

Secondary outcomes

HbA1c < 7.0% · week 40

OutcomeTirzepatide 5 mgTirzepatide 10 mgTirzepatide 15 mgInsulin glargine
Body weight change · week 40−5.0 kg−7.0 kg−7.2 kg1.5 kg
Percent change−6.5%−9.3%−9.4%+2.1%
Hemoglobin A1c (HbA1c) < 7.0% — Each tirzepatide dose vs insulin glargine
all P < 0.001
Body weight change — Superior weight reduction, all tirzepatide doses vs insulin glargine
all P < 0.001

Safety

Adverse events

Most common AEs with tirzepatide: mild to moderate decreased appetite, diarrhea and nausea
No severe hypoglycemia was reported

Original publication

Tirzepatide versus insulin glargine as second-line or third-line therapy in type 2 diabetes in the Asia-Pacific region: the SURPASS-AP-Combo trial. Nat Med. Published 25 May 2023. doi:10.1038/s41591-023-02344-1

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