Type 2 & other diabetes

Improved Hemoglobin A1c (HbA1c) and Body Weight in GADA-Positive Individuals Treated With Tirzepatide: A Post Hoc Analysis of SURPASS

J Clin Endocrinol MetabPublished Post hoc analysis of pooled SURPASS 2-5 randomised trials

Primary result · Change from baseline in HbA1cResult — go to the resultEstimated difference 0.21 % 95% CI 0.03–0.39

Authors' conclusion

In this post hoc analysis, tirzepatide was associated with substantial reductions in HbA1c and BW irrespective of GADA status in adults diagnosed with T2D, suggesting that tirzepatide may improve glycemic control in individuals with LADA.

Study context

Population
Adults with clinically diagnosed T2D treated with tirzepatide (5, 10, 15 mg) in SURPASS 2–5, with confirmed GADA statuspooled SURPASS 2–5
Participants
3,791 adults
Comparison
GADA-positive vs GADA-negative participants treated with tirzepatide
  • GADA positiven = 120
  • GADA negativen = 3,671reference
Primary endpoint
Change from baseline in HbA1c by GADA status
Follow-up
Weeks 40 (SURPASS-2, −3, −5) and 42 (SURPASS-4)
Methodological detailspooled data, mixed-model repeated measures, efficacy analysis set, adjusted for study and baseline covariates
  • Pooled data
  • Mixed-model repeated measures
  • Efficacy analysis set
  • Adjusted for study and baseline covariates

Primary result

Change from baseline in HbA1c · week 40/42

Estimated difference

0.21 %

95% CI 0.03–0.39

P = 0.024

Change by group

GADA-positive

−2.11

%

GADA-negative

−2.32

%

GADA-positivevs GADA-negative
estimated difference 0.21 % (95% CI 0.03–0.39); P = 0.024

As reported in the abstract

Within-group HbA1c reductions significant in both groups
P < 0.001

Further findings

kg

OutcomeGADA positiveGADA negativeEstimated difference (kg) (95% CI)P value
Change from baseline in body weight · week 40/42Did not differ between groups−9.2−9.60.38 (−0.99 to 1.75)P = 0.588

Mean

OutcomeGADA positiveGADA negative
Baseline BMI32.2 (SD 6.1)33.6 (SD 6.3)
Change from baseline in body weight — Within-group body weight (BW) reductions significant in both groups
P < .001

Baseline body mass index (BMI)

Other baseline characteristics similar between groups

Original publication

Improved HbA1c and Body Weight in GADA-Positive Individuals Treated With Tirzepatide: A Post Hoc Analysis of SURPASS. J Clin Endocrinol Metab. Published 3 June 2024. doi:10.1210/clinem/dgae372

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