The study found significant absolute effects of SGLT2 inhibitors on cardiovascular and kidney disease events in patients with baseline kidney disease status. Results showed that SGLT2 inhibitor treatment resulted in greater reductions of cardiovascular events in patients with lower eGFR and higher albuminuria, indicating substantially greater absolute benefits of renoprotection in patients with overt albuminuria than in their counterparts.
Rationale & Objective: There are few data on the absolute effects of sodium/glucose cotransporter 2 (SGLT2) inhibitors, despite their importance in treatment decision making. We investigated abso-lute treatment effects according to baseline kidney disease status. Study Design: Meta-analysis. Study Populations: Adults with type 2 diabetes, chronic kidney disease, or heart failure. Selection Criteria for Studies: Randomized controlled trials of SGLT2 inhibitors (10 trials to November 20, 2020) for clinical outcomes of kid-ney disease progression, heart failure events, and major cardiovascular events. Data Extraction: Publications of 10 trials to November 20, 2020. Analytical Approach: The incidence rate differ-ence (IRD) between SGLT2 inhibitor and placebo was compared across estimated glomerular filtra-tion rate (eGFR) or urinary albumin-creatinine ratio (UACR) subgroups. Results: Subgroup analyses included data from seven trials (61,821 participants with diabetes or chronic kidney disease). SGLT2 inhibitor treatment, in eGFR subgroups of <45, 45 to <60, and >= 60mL/min/1.73 m(2), reduced 16.0, 9.5, and 1.9 heart failure events per 1,000 patient-year, respectively (P < 0.001 for heterogeneity). In urine UACR subgroups of >300, 30 to 300, and <30 mg/g, SGLT2 inhibitors reduced 17.3, 1.4, and 2.2 kidney disease events per 1,000 patient-year, respectively (P < 0.001 for heterogeneity), and 14.8, 8.7, and 2.1 heart failure events per 1,000 patient-year, respectively (P = 0.006 for heterogeneity). The pooled IRDs for major cardiovascular events were also greater in lower eGFR or overt albuminuria subgroups. In secondary analyses, risk differences calculated using pooled baseline and relative risks were comparable to the pooled IRDs, while the relative risk reductions for kidney and heart failure outcomes were consistent across the subgroups. For treatment-related harms, IRDs were similar between eGFR subgroups. Limitations: Study-level data rather than individual patient data were used. Conclusions: SGLT2 inhibitor treatment resulted in greater reductions of cardiovascular events in patients with lower eGFR and higher albuminuria and had substantially greater absolute benefits of renoprotection in patients with overt albuminuria than in their counterparts.
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