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. 2021 Jan 26;143(4):337-349.
doi: 10.1161/CIRCULATIONAHA.120.051824. Epub 2020 Nov 11.

Effect of Empagliflozin on Cardiovascular and Renal Outcomes in Patients With Heart Failure by Baseline Diabetes Status: Results From the EMPEROR-Reduced Trial

Affiliations

Effect of Empagliflozin on Cardiovascular and Renal Outcomes in Patients With Heart Failure by Baseline Diabetes Status: Results From the EMPEROR-Reduced Trial

Stefan D Anker et al. Circulation. .

Abstract

Background: Sodium-glucose cotransporter 2 inhibitors improve outcomes in patients with heart failure with reduced ejection fraction, but additional information is needed about whether glycemic status influences the magnitude of their benefits on heart failure and renal events.

Methods: Patients with Class II-IV heart failure and a left ventricular ejection fraction ≤40% were randomized to receive empagliflozin (10 mg daily) or placebo in addition to recommended therapy. We prespecified a comparison of the effect of empagliflozin in patients with and without diabetes.

Results: Of the 3730 patients enrolled, 1856 (50%) had diabetes, 1268 (34%) had prediabetes (hemoglobin A1c [HbA1c] 5.7-6.4%), and 606 (16%) had normoglycemia (HbA1c <5.7%). The risks of the primary outcome (cardiovascular death or hospitalization for heart failure), total hospitalizations for heart failure, and adverse renal outcomes were higher in patients with diabetes, but were similar between patients with prediabetes and normoglycemia. Empagliflozin reduced the risk of the primary outcome in patients with and without diabetes (hazard ratio, 0.72 [95% CI, 0.60-0.87] and 0.78 [95% CI, 0.64-0.97], respectively, P-interaction=0.57). Patients with and without diabetes also did not differ with respect to the effect of empagliflozin on total hospitalizations for heart failure, on the decline in estimated glomerular filtration rate over time, and on the risk of serious adverse renal outcomes. Among these end points, the effects of the drug did not differ in patients with prediabetes or normoglycemia. When analyzed as a continuous variable, baseline HbA1c did not significantly modify the benefits of empagliflozin on the primary outcome (P-interaction=0.40). Empagliflozin did not lower HbA1c in patients with prediabetes or normoglycemia and was not associated with increased risk of hypoglycemia.

Conclusions: In EMPEROR-Reduced (Empagliflozin Outcome Trial in Patients With Chronic Heart Failure With Reduced Ejection Fraction), empagliflozin significantly improved cardiovascular and renal outcomes in patients with heart failure and a reduced ejection fraction, independent of baseline diabetes status and across the continuum of HbA1c. Registration: URL: https://www.clinicaltrials.gov; Unique identifier: NCT03057977.

Keywords: diabetes mellitus; empagliflozin; heart failure.

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Conflict of interest statement

Dr Anker reports grants and personal fees from Vifor International and Abbott Vascular and personal fees from Astra-Zeneca, Bayer, Brahms, Boehringer Ingelheim, Cardiac Dimensions, Novartis, Occlutech, Servier, and Vifor International. Dr Butler reports consulting fees from BI, Cardior, CVRx, Foundry, G3 Pharma, Imbria, Impulse Dynamics, Innolife, Janssen, LivaNova, Luitpold, Medtronic, Merck, Novartis, NovoNordisk, Relypsa, Roche, Sanofi, Sequana Medical, V-Wave Ltd, and Vifor. Dr Filippatos reports committee member contributions in trials sponsored by Medtronic, Vifor, Servier, Novartis, and Boehringer Ingelheim. Dr Khan reports no relevant disclosures. Dr Marx is funded by the German Research Foundation SFB TRR 219 (projects M-03 and M-05); reports giving lectures for and receiving honoraria from Amgen, Boehringer Ingelheim, Sanofi-Aventis, Merck Sharp & Dohme, Bristol-Myers Squibb, AstraZeneca, Lilly, and Novo Nordisk; receiving unrestricted research grants from Boehringer Ingelheim; serving as an advisor for Amgen, Bayer, Boehringer Ingelheim, Sanofi-Aventis, Merck Sharp & Dohme, Bristol-Myers Squibb, AstraZeneca, and Novo Nordisk; serving in trial leadership for Boehringer Ingelheim and Novo Nordisk; and declining all personal compensation from pharmaceutical and device companies. Dr Lam reports research grants from Bayer, Boston Scientific, Roche Diagnostic, Medtronic, Vifor Pharma, and AstraZeneca; consulting fees from Merck, Bayer, Boston Scientific, Roche Diagnostic, Vifor Pharma, AstraZeneca, Novartis, Amgen, Janssen Research & Development LLC, Menarini, Boehringer Ingelheim, Abbott Diagnostics, Corvia, Stealth BioTherapeutics, Novo Nordisk, JanaCare, Biofourmis, Darma, Applied Therapeutics, MyoKardia, Cytokinetics, WebMD Global LLC, Radcliffe Group Ltd, and Corpus; and serves as cofounder and nonexecutive director of eKo.ai. S. Schnaidt, Dr Ofstad, Dr Brueckmann, and Dr Jamal are employees of Boehringer Ingelheim. Dr Bocchi reports receiving consulting fees from Servier and Astra-Zeneca; subsidized travel/hotel/registration fees from Servier and Baldacci; membership in steering committees for Servier and Novartis; contracted research from Jansen, Bayer/Merck, Astra-Zeneca, Boehringer, and Ingelheim; and honoraria from Servier, Novartis, and Astra-Zeneca. Dr Ponikowski reports personal fees from Boehringer Ingelheim, Astra Zeneca, Servier, BMS, Amgen, Novartis, Merck, Pfizer, and Berlin Chemie, and grants and personal fees from Vifor Pharma. Dr Perrone serves on advisory boards and receives personal fees from Laboratorios Ferrer, Abbott–St Jude, Novartis, and Laboratorios Bago. Dr Januzzi reports grant support, consulting income, and participation in clinical end point committees/data safety monitoring boards from Janssen; participation in clinical end point committees/data safety monitoring boards from Boehringer Ingelheim; grant support from Novartis, Innolife, Applied Therapeutics, and Siemens Diagnostics; and consultancy fees from Novartis, Roche Diagnostics, and Abbott Diagnostics. Dr Verma holds a Tier 1 Canada Research Chair in Cardiovascular Surgery; reports receiving research grants and/or speaking honoraria from Amarin, Amgen, AstraZeneca, Bayer, Boehringer Ingelheim, Bristol-Myers Squibb, Eli Lilly, EOCI Pharmacomm Ltd, HLS Therapeutics, Janssen, Merck, Novartis, Novo Nordisk, Sanofi, Sun Pharmaceuticals, PhaseBio, and the Toronto Knowledge Translation Working Group; is a member of the scientific excellence committee of EMPEROR-Reduced and served as a national lead investigator of the DAPA-HF trial and EMPEROR-Reduced; and is the President of the Canadian Medical and Surgical Knowledge Translation Research Group, a federally incorporated not-for-profit physician organization. Dr Böhm reports fees from Amgen, AstraZeneca, Bayer, Boehringer Ingelheim, Cytokinetics, Servier, Medtronic, ReCor, Vifor, Novartis, and Abbott; and is supported by the Deutsche Forschungsgemeinschaft (grant TTR 219, S-01). Dr Ferreira is a consultant for Boehringer Ingelheim. Dr Pocock is a consultant for Boehringer Ingelheim. Dr Zannad has recently received steering committee or advisory board fees from Amgen, AstraZeneca, Bayer, Boehringer Ingelheim, Boston Scientific, Cardior, CVRx, Janssen, Livanova, Merck, Mundipharma, Novartis, Novo Nordisk, and Vifor Fresenius. Dr Packer reports personal fees from Boehringer Ingelheim during the conduct of the study and personal fees from AbbVie, Akcea, Amarin, AstraZeneca, Amgen, Boehringer Ingelheim, Cardiorentis, Daiichi Sankyo, Johnson & Johnson, Lilly, Novartis, Pfizer, Relypsa, Sanofi, Synthetic Biologics, Theravance, and NovoNordisk, outside the submitted work.

Figures

Figure 1.
Figure 1.
Effect of empagliflozin on the primary end point of EMPEROR-Reduced (Empagliflozin Outcome Trial in Patients With Chronic Heart Failure With Reduced Ejection Fraction). Time to first event of either cardiovascular death or heart failure hospitalization in (A) patients with diabetes and (B) patients without diabetes. HR indicates hazard ratio.
Figure 2.
Figure 2.
Effect of empagliflozin on the primary outcome of EMPEROR-Reduced (Empagliflozin Outcome Trial in Patients With Chronic Heart Failure With Reduced Ejection Fraction) by baseline glycohemoglobin (HbA1c) as continuous variable and distribution of HbA1c at baseline in the range between 5% and 12%. A, Effect of empagliflozin on the primary outcome of EMPEROR-Reduced by baseline HbA1c as continuous variable. This figure shows the linear association between HbA1c and log hazard ratio for the primary end point. The nonsignificant interaction test (P=0.40) indicates that the slope is not significantly different from zero. However, the display makes assumptions about linearity that are difficult to validate, and the slope is strongly influenced by a relatively small number of patients with extreme values. B, Distribution of HbA1c at baseline in the range between 5% and 12%.
Figure 3.
Figure 3.
Effect of empagliflozin on first and recurrent hospitalizations for heart failure. Effect of empagliflozin on first and recurrent hospitalizations for heart failure in (A) patients with diabetes and (B) patients without diabetes.
Figure 4.
Figure 4.
Effect of empagliflozin on renal composite end point. Effect of empagliflozin on renal composite end point in (A) patients with diabetes and (B) patients without diabetes. Composite renal end point is defined as chronic dialysis, renal transplant, sustained reduction of ≥40% eGFR, or sustained eGFR <15 mL/min/1.73 m2 for patients with eGFR ≥30 mL/min/1.73 m2 at baseline (<10 mL/min/1.73 m2 for patients with eGFR <30 mL/min/1.73 m2 at baseline). Dialysis is regarded as chronic if the frequency of dialysis is twice or more per week for at least 90 days. In accordance with usual practice, cumulative incidence plots were truncated when the number of patients being followed in individual subgroups became extremely sparse. HR indicates hazard ratio.
Figure 5.
Figure 5.
Treatment effect of empagliflozin vs placebo on primary and secondary outcomes in patients with normoglycemia, prediabetes, and diabetes. Recurrent event analyses are based on a joint frailty model accounting for competing risk of cardiovascular death. *n corresponds to number of events in recurrent event analyses and number of patients with event for time-to-first-event analysis. †Interaction P values from trend test assuming ordered categories. The trend test reflects an assumed ordering of the subgroups from normoglycemia to prediabetes to diabetes testing a linear trend across subgroups. ‡Composite renal end point: time to first event of chronic dialysis or renal transplant or sustained reduction of ≥40% estimated glomerular filtration rate (eGFR; Chronic Kidney Disease Epidemiology Collaboration [CKD-EPI]cr); or for patients with eGFR (CKD-EPI)cr ≥30 mL/min/1.73 m2 at baseline: sustained eGFR <15 mL/min/1.73 m2; for patients with eGFR (CKD-EPI)cr <30 mL/min/1.73 m2 at baseline: sustained eGFR <10 mL/min/1.73 m2. An eGFR (CDK-EPI)cr reduction is considered sustained if it is determined by 2 or more consecutive postbaseline central laboratory measurements separated by at least 30 days (first to last of the consecutive eGFR values). If there is no additional measurement ≥30 days after the eGFR reduction is observed and the patient dies within 60 days of this measurement, then the eGFR reduction is also considered sustained. HHF indicates hospitalization for heart failure.
Figure 6.
Figure 6.
Glycohemoglobin changes from baseline by glycemic status. A, Diabetes. B, Prediabetes. C, Normoglycemia.

Comment in

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