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Sex Differences in Characteristics, Outcomes and Treatment Response with Dapagliflozin across the Range of Ejection Fraction in Patients with Heart Failure: Insights from DAPA-HF and DELIVER.
Circulation 2022 November 8
BACKGROUND: Sodium-glucose cotransporter-2 (SGLT2) inhibitors have emerged as a key pharmacotherapy in heart failure (HF) with both reduced and preserved ejection fraction. The benefit of other HF therapies may be modified by sex, but whether sex modifies the treatment effect and safety profile of SGLT2 inhibitors remains unclear. Our analyses aim to assess the impact of sex on the efficacy and safety of dapagliflozin.
METHODS: In a pre-specified patient-level pooled analysis of DAPA-HF and DELIVER, clinical outcomes were compared by sex (including the composite of cardiovascular [CV] death or worsening HF events; CV death; all-cause death, total events (first and recurrent HF hospitalization and CV death), and Kansas City Cardiomyopathy Questionnaire [KCCQ] scores) across the spectrum of left ventricular ejection fraction (EF).
RESULTS: Of a total of 11,007 randomized patients, 3856 (35%) were women. Women with HF were older, had higher body mass index, but were less likely to have a history of diabetes and myocardial infarction/stroke; and more likely to have hypertension and atrial fibrillation, compared to men. At baseline, women had higher EF but worse KCCQ scores than men. After adjusting for baseline differences, women were less likely than men to experience CV death (adjusted hazard ratio [aHR] 0.69, 95% CI 0.60-0.79), all-cause death (aHR 0.69, 95% 0.62-0.78), HF hospitalizations (aHR 0.82, 95% CI 0.72-0.94), and total events (adjusted rate ratio 0.77, 95% CI 0.71-0.84). Dapagliflozin reduced the primary endpoint in both men and women similarly (p-interaction=0.77) with no sex-related differences in secondary outcomes (all p-interactions > 0.35) or safety events. The benefit of dapagliflozin was observed across the entire EF spectrum and was not modified by sex (p-interaction > 0.40). There were no sex-related differences in serious adverse events, adverse events, or drug discontinuation due to adverse events.
CONCLUSIONS: In DAPA-HF and DELIVER, the response to dapagliflozin was similar between men and women. Sex did not modify the treatment effect of dapagliflozin across the range of ejection fraction.
METHODS: In a pre-specified patient-level pooled analysis of DAPA-HF and DELIVER, clinical outcomes were compared by sex (including the composite of cardiovascular [CV] death or worsening HF events; CV death; all-cause death, total events (first and recurrent HF hospitalization and CV death), and Kansas City Cardiomyopathy Questionnaire [KCCQ] scores) across the spectrum of left ventricular ejection fraction (EF).
RESULTS: Of a total of 11,007 randomized patients, 3856 (35%) were women. Women with HF were older, had higher body mass index, but were less likely to have a history of diabetes and myocardial infarction/stroke; and more likely to have hypertension and atrial fibrillation, compared to men. At baseline, women had higher EF but worse KCCQ scores than men. After adjusting for baseline differences, women were less likely than men to experience CV death (adjusted hazard ratio [aHR] 0.69, 95% CI 0.60-0.79), all-cause death (aHR 0.69, 95% 0.62-0.78), HF hospitalizations (aHR 0.82, 95% CI 0.72-0.94), and total events (adjusted rate ratio 0.77, 95% CI 0.71-0.84). Dapagliflozin reduced the primary endpoint in both men and women similarly (p-interaction=0.77) with no sex-related differences in secondary outcomes (all p-interactions > 0.35) or safety events. The benefit of dapagliflozin was observed across the entire EF spectrum and was not modified by sex (p-interaction > 0.40). There were no sex-related differences in serious adverse events, adverse events, or drug discontinuation due to adverse events.
CONCLUSIONS: In DAPA-HF and DELIVER, the response to dapagliflozin was similar between men and women. Sex did not modify the treatment effect of dapagliflozin across the range of ejection fraction.
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