Effect of Dapagliflozin in DAPA-HF According to Background Glucose-Lowering Therapy

Kieran F Docherty1, Pardeep S Jhund1, Olof Bengtsson2

  • 1BHF Cardiovascular Research Centre, University of Glasgow, Glasgow, U.K.

Diabetes Care
|October 21, 2020
PubMed

Insights

Dapagliflozin benefits heart failure patients with type 2 diabetes, regardless of glucose-lowering therapy. The drug improved outcomes in the DAPA-HF trial, showing consistent efficacy across different treatment backgrounds.

Area of Science:

  • Cardiology
  • Endocrinology
  • Pharmacology

Background:

  • Heart failure with reduced ejection fraction (HFrEF) is a significant cause of morbidity and mortality.
  • Type 2 diabetes (T2D) is a common comorbidity in HFrEF patients, often managed with glucose-lowering therapy (GLT).
  • The impact of background GLT on the efficacy of HFrEF treatments requires further elucidation.

Purpose of the Study:

  • To investigate whether the cardiovascular benefits of dapagliflozin in patients with HFrEF and T2D, as observed in the DAPA-HF trial, are influenced by their background glucose-lowering therapy.
  • To analyze treatment effects across different classes and combinations of GLTs.

Main Methods:

  • Analysis of data from the Dapagliflozin And Prevention of Adverse-Outcomes in Heart Failure (DAPA-HF) trial.
  • Subgroup analysis examining the primary outcome (composite of worsening heart failure or cardiovascular death) based on the use or non-use of GLT.
  • Further stratification by specific GLT classes and combinations.

Main Results:

  • In the 2,139 patients with T2D, dapagliflozin demonstrated a consistent effect on the primary outcome, irrespective of GLT use (HR 0.72 [95% CI 0.58-0.88]) versus no GLT use (HR 0.86 [0.60-1.23]).
  • The interaction P-value for GLT use was 0.39, indicating no significant difference in treatment effect based on GLT status.
  • Efficacy remained consistent across various GLT classes and combinations.

Conclusions:

  • Dapagliflozin provides significant benefits for patients with HFrEF and T2D, independent of their background glucose-lowering therapy.
  • The findings suggest that dapagliflozin can be effectively used in this patient population regardless of concurrent diabetes management strategies.
  • This supports the broad utility of dapagliflozin in managing HFrEF in patients with type 2 diabetes.
Abstract

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