Agarwal, RajivAnker, Stefan D.Filippatos, GerasimosPitt, BertramRossing, PeterRuilope, Luis M.Boletis, JohnToto, RobertUmpierrez, Guillermo E.Wanner, ChristophWada, TakashiScott, CharlieJoseph, AmerOgbaa, IkeRoberts, LukeScheerer, Markus F.Bakris, George L.FIDELIO-DKD investigators2024-05-012024-05-012022Agarwal R, Anker SD, Filippatos G, et al. Effects of canagliflozin versus finerenone on cardiorenal outcomes: exploratory post hoc analyses from FIDELIO-DKD compared to reported CREDENCE results. Nephrol Dial Transplant. 2022;37(7):1261-1269. doi:10.1093/ndt/gfab336https://hdl.handle.net/1805/40405Background: The nonsteroidal mineralocorticoid receptor antagonist finerenone and the sodium-glucose cotransporter-2 inhibitor (SGLT-2i) canagliflozin reduce cardiorenal risk in albuminuric patients with chronic kidney disease (CKD) and type 2 diabetes (T2D). At first glance, the results of Finerenone in Reducing Kidney Failure and Disease Progression in Diabetic Kidney Disease (FIDELIO-DKD) (ClinicalTrials.gov, NCT02540993) and Canagliflozin and Renal Events in Diabetes with Established Nephropathy Clinical Evaluation (CREDENCE) appear disparate. In FIDELIO-DKD, the primary endpoint had an 18% [95% confidence interval (CI) 7-27] relative risk reduction; in CREDENCE, the primary endpoint had a 30% (95% CI 18-41) relative risk reduction. Unlike CREDENCE, the FIDELIO-DKD trial included patients with high albuminuria but excluded patients with symptomatic heart failure with reduced ejection fraction. The primary endpoint in the FIDELIO-DKD trial was kidney specific and included a sustained decline in the estimated glomerular filtration rate (eGFR) of ≥40% from baseline. In contrast, the primary endpoint in the CREDENCE trial included a sustained decline in eGFR of ≥57% from baseline and cardiovascular (CV) death. This post hoc exploratory analysis investigated how differences in trial design-inclusion/exclusion criteria and definition of primary outcomes-influenced observed treatment effects. Methods: Patients from FIDELIO-DKD who met the CKD inclusion criteria of the CREDENCE study (urine albumin: creatinine ratio >300-5000 mg/g and an eGFR of 30-<90 mL/min/1.73 m2 at screening) were included in this analysis. The primary endpoint was a cardiorenal composite (CV death, kidney failure, eGFR decrease of ≥57% sustained for ≥4 weeks or renal death). Patients with symptomatic heart failure with reduced ejection fraction were excluded from FIDELIO-DKD. Therefore, in a sensitivity analysis, we further adjusted for the baseline prevalence of heart failure. Results: Of 4619/5674 (81.4%) patients who met the subgroup inclusion criteria, 49.6% were treated with finerenone and 50.4% received placebo. The rate of the cardiorenal composite endpoint was 43.9/1000 patient-years with finerenone compared with 59.5/1000 patient-years with placebo. The relative risk was significantly reduced by 26% with finerenone versus placebo [hazard ratio (HR) 0.74 (95% CI 0.63-0.87)]. In CREDENCE, the rate of the cardiorenal composite endpoint was 43.2/1000 patient-years with canagliflozin compared with 61.2/1000 patient-years with placebo; a 30% risk reduction was observed with canagliflozin [HR 0.70 (95% CI 0.59-0.82)]. Conclusions: This analysis highlights the pitfalls of direct comparisons between trials. When key differences in trial design are considered, FIDELIO-DKD and CREDENCE demonstrate cardiorenal benefits of a similar magnitude.en-USAttribution-NonCommercial 4.0 InternationalCREDENCEFIDELIO-DKDCanagliflozinCardiorenalFinerenoneArticle