Key result
Canagliflozin fails to reduce stroke risk in patients with type 2 diabetes and CKD.
Why the study?
Chronic kidney disease with reduced estimated glomerular filtration rate or elevated albuminuria increases the risk for ischemic and hemorrhagic stroke, prompting an assessment of SGLT2 inhibitor effects on stroke and AF/AFL.
Does canagliflozin or SGLT2 inhibitors as a class reduce the risk of stroke and atrial fibrillation in patients with type 2 diabetes mellitus and chronic kidney disease?
RCT (n=4,401)
Double-blind
1:1
Yes
Does canagliflozin or SGLT2 inhibitors as a class reduce the risk of stroke and atrial fibrillation in patients with type 2 diabetes mellitus and chronic kidney disease?
While SGLT2 inhibitors do not significantly reduce total stroke risk in patients with type 2 diabetes, they may offer protection against hemorrhagic stroke and atrial fibrillation, particularly in those with reduced kidney function.
Background and Purpose: Chronic kidney disease with reduced estimated glomerular filtration rate or elevated albuminuria increases risk for ischemic and hemorrhagic stroke. This study assessed the effects of sodium glucose cotransporter 2 inhibitors (SGLT2i) on stroke and atrial fibrillation/flutter (AF/AFL) from CREDENCE (Canagliflozin and Renal Events in Diabetes With Established Nephropathy Clinical Evaluation) and a meta-analysis of large cardiovascular outcome trials (CVOTs) of SGLT2i in type 2 diabetes mellitus. Methods: CREDENCE randomized 4401 participants with type 2 diabetes mellitus and chronic kidney disease to canagliflozin or placebo. Post hoc, we estimated effects on fatal or nonfatal stroke, stroke subtypes, and intermediate markers of stroke risk including AF/AFL. Stroke and AF/AFL data from 3 other completed large CVOTs and CREDENCE were pooled using random-effects meta-analysis. Results: In CREDENCE, 142 participants experienced a stroke during follow-up (10.9/1000 patient-years with canagliflozin, 14.2/1000 patient-years with placebo; hazard ratio [HR], 0.77 [95% CI, 0.55–1.08]). Effects by stroke subtypes were: ischemic (HR, 0.88 [95% CI, 0.61–1.28]; n=111), hemorrhagic (HR, 0.50 [95% CI, 0.19–1.32]; n=18), and undetermined (HR, 0.54 [95% CI, 0.20–1.46]; n=17). There was no clear effect on AF/AFL (HR, 0.76 [95% CI, 0.53–1.10]; n=115). The overall effects in the 4 CVOTs combined were: total stroke (HR pooled , 0.96 [95% CI, 0.82–1.12]), ischemic stroke (HR pooled , 1.01 [95% CI, 0.89–1.14]), hemorrhagic stroke (HR pooled , 0.50 [95% CI, 0.30–0.83]), undetermined stroke (HR pooled , 0.86 [95% CI, 0.49–1.51]), and AF/AFL (HR pooled , 0.81 [95% CI, 0.71–0.93]). There was evidence that SGLT2i effects on total stroke varied by baseline estimated glomerular filtration rate ( P =0.01), with protection in the lowest estimated glomerular filtration rate (<45 mL/min/1.73 m 2 ]) subgroup (HR pooled , 0.50 [95% CI, 0.31–0.79]). Conclusions: Although we found no clear effect of SGLT2i on total stroke in CREDENCE or across trials combined, there was some evidence of benefit in preventing hemorrhagic stroke and AF/AFL, as well as total stroke for those with lowest estimated glomerular filtration rate. Future research should focus on confirming these data and exploring potential mechanisms. Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT02065791.
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Zhou et al. (2021) conducted an RCT in Type 2 diabetes mellitus and chronic kidney disease (n=4,401). Canagliflozin vs. Placebo was evaluated on Fatal or nonfatal stroke combined (HR 0.77, 95% CI 0.55-1.08). Canagliflozin did not significantly reduce the risk of fatal or nonfatal stroke compared to placebo in patients with type 2 diabetes and chronic kidney disease (HR 0.77).
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