Obesity

Effect of Semaglutide on Regression and Progression of Glycemia in People With Overweight or Obesity but Without Diabetes in the SELECT Trial

Diabetes CarePublished Secondary analysis of the SELECT randomised trial

Primary result · HbA1cResult — go to the resultMean difference −0.32 percentage points 95% CI −0.33 to −0.30

Authors' conclusion

In people with preexisting cardiovascular disease and overweight or obesity but without diabetes, long-term semaglutide increases regression to biochemical normoglycemia and reduces progression to biochemical diabetes but does not slow glycemic progression over time.

Study context

Population
Adults aged ≥45 years with BMI ≥27 kg/m² and preexisting CVD but without diabetes (HbA1c <6.5%)
Participants
17,604 adults
Comparison
Semaglutide 2.4 mg weekly vs placebo
  • Semaglutiden = 8,803
  • Placebon = 8,801reference
Primary endpoint
Major glycemic outcomes: HbA1c, proportions achieving biochemical normoglycemia (HbA1c <5.7%) and progressing to biochemical diabetes (HbA1c ≥6.5%)
Methodological detailsmulticentre, double-blind, Mean ± SD intervention exposure 152 ± 56 weeks; follow-up 176 ± 40 weeks
  • Multicentre
  • Double-blind
  • Mean ± SD intervention exposure 152 ± 56 weeks; follow-up 176 ± 40 weeks

Primary result

HbA1c · after nadir at 20 weeks, throughout study

Mean difference

−0.32 percentage points

95% CI −0.33 to −0.30

P < 0.0001

Semaglutidevs Placebo
mean difference −0.32 percentage points (95% CI −0.33 to −0.30); P < 0.0001

As reported in the abstract

Further findings

Progression to biochemical diabetes (HbA1c ≥6.5%) · by week 156

P < 0.0001

Number needed to treat to prevent a case of diabetes

NNT to prevent a case of diabetes
18.5

Body weight · plateau at 65 weeks

Body weight lower with semaglutide
8.9%

Mediation by weight reduction

Share of progression mediated by magnitude of weight reduction
24.5%
Share of regression mediated by magnitude of weight reduction
27.1%
Regression and progression dependent on baseline glycemia

Original publication

Effect of Semaglutide on Regression and Progression of Glycemia in People With Overweight or Obesity but Without Diabetes in the SELECT Trial. Diabetes Care. Published 22 June 2024. doi:10.2337/dc24-0491

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