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Statin therapy and clinical outcomes in heart failure: a propensity-matched analysis
Maral Ouzounian1, Jack V Tu, Peter C Austin
1Heart & Stroke/Richard Lewar Centre for Excellence, University of Toronto, Toronto, Ontario, Canada.
Insights
Statin therapy shows improved outcomes for heart failure (HF) patients, especially those with coronary artery disease (CAD). This study analyzed 5-year survival rates and combined endpoints in HF patients post-hospitalization.
Area of Science:
- Cardiology
- Pharmacology
- Public Health
Background:
- Statin therapy's role in heart failure (HF) is a significant area of research.
- Previous studies have yielded varied results regarding statin efficacy in HF patients.
Purpose of the Study:
- To investigate the association between statin therapy and patient outcomes after hospitalization for heart failure.
- To determine if statins improve mortality and morbidity in HF patients.
Main Methods:
- Utilized data from 6,451 heart failure patients hospitalized in Ontario between 1999-2001.
- Employed propensity score methods to analyze 5-year outcomes, stratifying by coronary artery disease (CAD) and ejection fraction (HFPEF/HFREF).
Main Results:
- Statin use was linked to a significant 5-year mortality benefit overall (HR 0.85, P = .05).
- Patients with coronary artery disease (CAD) showed a pronounced benefit from statins, with reduced mortality (HR 0.79, P = .008) and a lower risk of combined endpoints (HR 0.85, P = .045).
Conclusions:
- Statin therapy is associated with improved outcomes in heart failure patients discharged from hospital.
- The benefits of statins were particularly evident in patients with co-existing coronary artery disease (CAD).
- Ejection fraction status did not significantly alter the impact of statin therapy in this heart failure cohort.
Background:
The influence of statin therapy in heart failure (HF) has been of considerable interest. The objective of this study was to determine if statins are associated with improved outcomes in patients discharged after hospitalization for HF.
Methods:
Patients admitted to Ontario hospitals between 1999 and 2001 with HF were identified in the Enhanced Feedback For Effective Cardiac Treatment study. Propensity score methods were used to assess 5-year outcomes in the overall cohort as well as in 4 subgroups: those with coronary artery disease (CAD) or without (NoCAD), and those with preserved ejection fraction (HFPEF) or with reduced ejection fraction (HFREF). Of the 6451 HF patients, 1121 were discharged with a prescription for a statin.
Results:
In propensity analysis stratified on matched pairs in a Cox proportional hazards model, statins were associated with improved mortality at 5 years overall (hazard ratio [HR] 0.85, P = .05) and in those with CAD (HR 0.79, P = .008). Similarly, statins were associated with lower risk of the combined end point in the CAD group (HR 0.85, P = .045).
Conclusions:
Among patients with HF discharged from hospital, statin therapy was associated with improved outcomes, particularly in patients with CAD. Stratification by ejection fraction did not differentially impact the effect of statins in patients with HF.
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