Abstract
Purpose
We aimed to develop a simple risk score for patients with HFpEF and assessed the efficacy of spironolactone across baseline risk.
Methods
We developed risk stratification scheme for cardiovascular death in placebo arm of the Treatment of Preserved Cardiac Function Heart Failure with an Aldosterone Antagonist trial (TOPCAT). We screened candidate risk indicators and determined strong risk predictors using COX regression. The absolute risk reduction (ARR) in cardiovascular death with spironolactone was evaluated across baseline risk groups. COX regressions were performed to assess the hazard ratios (HRs) of spironolactone therapy for cardiovascular death and drug discontinuation in each risk category.
Results
A simple risk score scheme was constructed based on five risk indicators weighted by estimates from the model, including age, diastolic blood pressure, renal dysfunction, white blood cell, and left ventricular ejection fraction. The risk score scheme showed good discrimination in placebo cohort (C index=0.70). ARR with spironolactone therapy was observed only in patients at very high risk (7.9%). Spironolactone therapy significantly reduced the risk of cardiovascular death in the very high-risk group (HR: 0.57; 95%CI, 0.39–0.84; P =0.005 and P for interaction 0.03) but showed similar risk of drug discontinuation across risk categories (P for interaction=0.928).
Conclusion
This simple risk score stratifies patients with HFpEF by their baseline risk of cardiovascular death. Patients at very high risk derive great benefits from spironolactone therapy. This easy-to-use risk score provides a practical tool that can facilitate risk stratification and tailoring therapy for those who benefit most from spironolactone.
Trial Registration
ClinicalTrials.gov Identifier: NCT00094302.
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Availability of Data and Material
This study used TOPCAT trial data that are available to eligible researchers after registration.
Code Availability
Not applicable
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Acknowledgements
We thank the staff and participants of the TOPCAT study and ARIC study for their contributions. We express our appreciation to Shuyi Wang, MD, for her generous assistance in manuscript editing.
Funding
This work was supported by the National Natural Science Foundation of China (81600206 to ZXD; 81870195 to LXX) and Natural Science Foundation of Guangdong Province (2016A030310140 to ZXD; 2016A020220007 and 2019A1515011582 to LXX).
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LXX, ZXD, and LYF contributed to the conception or design of the work. All authors were responsible for the acquisition, analysis, and interpretation of data. LYF, ZXB, and ZSZ drafted the manuscript. Critical revision of the manuscript for important intellectual content were performed by all authors. All authors agreed with the content of the article to be submitted.
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Lin, Y., Zhong, X., Liu, M. et al. Risk Stratification and Efficacy of Spironolactone in Patients with Heart Failure with Preserved Ejection Fraction: Secondary Analysis of the TOPCAT Randomized Clinical Trial. Cardiovasc Drugs Ther 36, 323–331 (2022). https://doi.org/10.1007/s10557-021-07178-y
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DOI: https://doi.org/10.1007/s10557-021-07178-y