Abstract
Background
There is evidence that angiotensin-converting enzyme inhibitors (ACEI) and angiotensin-II receptor blockers (ARB) may reduce cardiovascular (CV) risk in patients undergoing peritoneal dialysis (PD), but no studies have compared the effectiveness between these drug classes. In this observational cohort study, we compared the association of ARB vs. ACEI use on CV outcomes in patients initiating PD.
Methods
We identified from the US Renal Data System all adult patients who initiated PD from 2007 to 2011 and participated in Medicare Part D, a federal prescription drug benefits program, for the first 90 days of dialysis. Patients who filled a prescription for an ACEI or ARB in those 90 days were considered users. We excluded patients who used both ACEI and ARB. We applied Cox proportional hazards regression to an inverse probability of treatment-weighted cohort to estimate the hazard ratios (HR) for the combined outcome of all-cause death, ischemic stroke, or myocardial infarction; all-cause mortality; and CV death.
Results
Among 1892 patients using either drug class, 39 % were ARB users. We observed 624 events over 2,898 person-years of follow-up, for a composite event rate of 22 events per 100 person-years. We observed no differences between ARB vs. ACEI users: composite outcome HR 0.94, 95 % confidence interval (CI) 0.79–1.11; all-cause mortality HR 0.92, 95 % CI 0.76–1.10; CV death HR: 1.06, 95 % CI 0.80–1.41.
Conclusion
We identified no significant difference in the risks of CV events or death between users of ARBs vs. ACEIs in patients initiating PD, thus supporting their mostly interchangeable use in this population.
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Acknowledgments
This work was supported by Grants F32DK096765 (JIS), K23DK103972 (JIS), and K23DK095914 (TIC) from the National Institute of Diabetes, Digestive, and Kidney Diseases (NIDDK, Bethesda, MA, USA). The Stanford Nephrology fellowship program was supported by Grant T32DK007357. JIS was also supported by the Satellite Dialysis Clinical Investigator Award from the National Kidney Foundation, Grant KL2TR000122 from the NIH/National Center for Advancing Translational Science (NCATS), and a generous gift honoring the life and work of nephrologist Henry Shavelle, MD. The data reported here have been supplied by the United States Renal Data System (USRDS). The interpretation and reporting of these data are the responsibility of the authors and in no way should be seen as official policy or interpretation of the US government.
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Institutional Review Boards of Stanford University and Baylor College of Medicine approved the study. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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ABS is on the speaker’s bureau for Baxter International. None of the other authors have financial conflicts of interest to disclose.
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Shen, J.I., Saxena, A.B., Montez-Rath, M.E. et al. Comparative effectiveness of angiotensin receptor blockers vs. angiotensin-converting enzyme inhibitors on cardiovascular outcomes in patients initiating peritoneal dialysis. J Nephrol 30, 281–288 (2017). https://doi.org/10.1007/s40620-016-0340-3
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DOI: https://doi.org/10.1007/s40620-016-0340-3