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BACKGROUND: Sodium glucose cotransporter 2 inhibitors (SGLT2i), glucagon-like peptide-1 receptor agonists (GLP-1 RA), and the nonsteroidal mineralocorticoid receptor antagonist (ns-MRA) finerenone all individually reduce cardiovascular, kidney, and mortality outcomes in patients with type 2 diabetes and albuminuria. However, the lifetime benefits of combination therapy with these medicines are not known. METHODS: We used data from 2 SGLT2i trials (CANVAS [Canagliflozin Cardiovascular Assessment] and CREDENCE [Canagliflozin and Renal Events in Diabetes with Established Nephropathy Clinical Evaluation]), 2 ns-MRA trials (FIDELIO-DKD [Finerenone in Reducing Kidney Failure and Disease Progression in Diabetic Kidney Disease] and FIGARO-DKD [Efficacy and Safety of Finerenone in Subjects With Type 2 Diabetes Mellitus and the Clinical Diagnosis of Diabetic Kidney Disease]), and 8 GLP-1 RA trials to estimate the relative effects of combination therapy versus conventional care (renin-angiotensin system blockade and traditional risk factor control) on cardiovascular, kidney, and mortality outcomes. Using actuarial methods, we then estimated absolute risk reductions with combination SGLT2i, GLP-1 RA, and ns-MRA in patients with type 2 diabetes and at least moderately increased albuminuria (urinary albumin:creatinine ratio ≥30 mg/g) by applying estimated combination treatment effects to participants receiving conventional care in CANVAS and CREDENCE. RESULTS: Compared with conventional care, the combination of SGLT2i, GLP-1 RA, and ns-MRA was associated with a hazard ratio of 0.65 (95% CI, 0.55-0.76) for major adverse cardiovascular events (nonfatal myocardial infarction, nonfatal stroke, or cardiovascular death). The corresponding estimated absolute risk reduction over 3 years was 4.4% (95% CI, 3.0-5.7), with a number needed to treat of 23 (95% CI, 18-33). For a 50-year-old patient commencing combination therapy, estimated major adverse cardiovascular event-free survival was 21.1 years compared with 17.9 years for conventional care (3.2 years gained [95% CI, 2.1-4.3]). There were also projected gains in survival free from hospitalized heart failure (3.2 years [95% CI, 2.4-4.0]), chronic kidney disease progression (5.5 years [95% CI, 4.0-6.7]), cardiovascular death (2.2 years [95% CI, 1.2-3.0]), and all-cause death (2.4 years [95% CI, 1.4-3.4]). Attenuated but clinically relevant gains in event-free survival were observed in analyses assuming 50% additive effects of combination therapy, including for major adverse cardiovascular events (2.4 years [95% CI, 1.1-3.5]), chronic kidney disease progression (4.5 years [95% CI, 2.8-5.9]), and all-cause death (1.8 years [95% CI, 0.7-2.8]). CONCLUSIONS: In patients with type 2 diabetes and at least moderately increased albuminuria, combination treatment of SGLT2i, GLP-1 RA, and ns-MRA has the potential to afford relevant gains in cardiovascular and kidney event-free and overall survival.
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Enfermedades Cardiovasculares , Diabetes Mellitus Tipo 2 , Nefropatías Diabéticas , Insuficiencia Renal Crónica , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Humanos , Persona de Mediana Edad , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Inhibidores del Cotransportador de Sodio-Glucosa 2/efectos adversos , Nefropatías Diabéticas/tratamiento farmacológico , Nefropatías Diabéticas/etiología , Canagliflozina/uso terapéutico , Agonistas Receptor de Péptidos Similares al Glucagón , Albuminuria/tratamiento farmacológico , Riñón , Péptido 1 Similar al Glucagón/farmacología , Péptido 1 Similar al Glucagón/uso terapéuticoRESUMEN
BACKGROUND: Sodium-glucose cotransporter-2 inhibitors (SGLT2i) consistently improve heart failure and kidney-related outcomes; however, effects on major adverse cardiovascular events (MACE) across different patient populations are less clear. METHODS: This was a collaborative trial-level meta-analysis from the SGLT2i Meta-analysis Cardio-Renal Trialists Consortium, which includes all phase 3, placebo-controlled, outcomes trials of SGLT2i across 3 patient populations (patients with diabetes at high risk for atherosclerotic cardiovascular disease, heart failure [HF], or chronic kidney disease). The outcomes of interest were MACE (composite of cardiovascular death, myocardial infarction , or stroke), individual components of MACE (inclusive of fatal and nonfatal events), all-cause mortality, and death subtypes. Effect estimates for SGLT2i versus placebo were meta-analyzed across trials and examined across key subgroups (established atherosclerotic cardiovascular disease, previous myocardial infarction, diabetes, previous HF, albuminuria, chronic kidney disease stages, and risk groups). RESULTS: A total of 78 607 patients across 11 trials were included: 42 568 (54.2%), 20 725 (26.4%), and 15 314 (19.5%) were included from trials of patients with diabetes at high risk for atherosclerotic cardiovascular disease, HF, or chronic kidney disease, respectively. SGLT2i reduced the rate of MACE by 9% (hazard ration [HR], 0.91 [95% CI, 0.87-0.96], P<0.0001) with a consistent effect across all 3 patient populations (I2=0%) and across all key subgroups. This effect was primarily driven by a reduction in cardiovascular death (HR, 0.86 [95% CI, 0.81-0.92], P<0.0001), with no significant effect for myocardial infarction in the overall population (HR, 0.95 [95% CI, 0.87-1.04], P=0.29), and no effect on stroke (HR, 0.99 [95% CI, 0.91-1.07], P=0.77). The benefit for cardiovascular death was driven primarily by reductions in HF death and sudden cardiac death (HR, 0.68 [95% CI, 0.46-1.02] and HR, 0.86 [95% CI, 0.78-0.95], respectively) and was generally consistent across subgroups, with the possible exception of being more apparent in those with albuminuria (Pinteraction=0.02). CONCLUSIONS: SGLT2i reduce the risk of MACE across a broad range of patients irrespective of atherosclerotic cardiovascular disease, diabetes, kidney function, or other major clinical characteristics at baseline. This effect is driven primarily by a reduction of cardiovascular death, particularly HF death and sudden cardiac death, without a significant effect on myocardial infarction in the overall population, and no effect on stroke. These data may help inform selection for SGLT2i therapies across the spectrum of cardiovascular-kidney-metabolic disease.
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Enfermedades Cardiovasculares , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Inhibidores del Cotransportador de Sodio-Glucosa 2/uso terapéutico , Inhibidores del Cotransportador de Sodio-Glucosa 2/efectos adversos , Humanos , Enfermedades Cardiovasculares/mortalidad , Insuficiencia Renal Crónica/mortalidad , Insuficiencia Renal Crónica/tratamiento farmacológico , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/mortalidad , Diabetes Mellitus Tipo 2/complicaciones , Femenino , Masculino , Resultado del Tratamiento , AncianoRESUMEN
Pharmacologic interventions to slow chronic kidney disease progression, such as ACE-inhibitors, angiotensin receptor blockers, or sodium glucose co-transporter 2 inhibitors, often produce acute treatment effects on glomerular filtration rate (GFR) that differ from their long-term chronic treatment effects. Observational studies assessing the implications of acute effects cannot distinguish acute effects from GFR changes unrelated to the treatment. Here, we performed meta-regression analysis of multiple trials to isolate acute effects to determine their long-term implications. In 64 randomized controlled trials (RCTs), enrolling 154,045 participants, we estimated acute effects as the mean between-group difference in GFR slope from baseline to three months, effects on chronic GFR slope (starting at three months after randomization), and effects on three composite kidney endpoints defined by kidney failure (GFR 15 ml/min/1.73m2 or less, chronic dialysis, or kidney transplantation) or sustained GFR declines of 30%, 40% or 57% decline, respectively. We used Bayesian meta-regression to relate acute effects with treatment effects on chronic slope and the composite kidney endpoints. Overall, acute effects were not associated with treatment effects on chronic slope. Acute effects were associated with the treatment effects on composite kidney outcomes such that larger negative acute effects were associated with lesser beneficial effects on the composite kidney endpoints. Associations were stronger when the kidney composite endpoints were defined by smaller thresholds of GFR decline (30% or 40%). Results were similar in a subgroup of interventions with supposedly hemodynamic effects that acutely reduce GFR. For studies with GFR 60 mL/min/1.73m2 or under, negative acute effects were associated with larger beneficial effects on chronic GFR slope. Thus, our data from a large and diverse set of RCTs suggests that acute effects of interventions may influence the treatment effect on clinical kidney outcomes.
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RATIONALE & OBJECTIVE: Atrial fibrillation (AF) and chronic kidney disease (CKD) often coexist. However, it is not known whether CKD is an independent risk factor for incident AF. Therefore, we evaluated the association between markers of CKD-estimated glomerular filtration rate (eGFR) and albuminuria-and incident AF. STUDY DESIGN: Systematic review and meta-analysis of cohort studies and randomized controlled trials. SETTING & STUDY POPULATIONS: Participants with measurement of eGFR and/or albuminuria who were not receiving dialysis. SELECTION CRITERIA FOR STUDIES: Cohort studies and randomized controlled trials were included that reported incident AF risk in adults according to eGFR and/or albuminuria. ANALYTICAL APPROACH: Age- or multivariate-adjusted risk ratios (RRs) for incident AF were extracted from cohort studies, and RRs for each trial were derived from event data. RRs for incident AF were pooled using random-effects models. RESULTS: 38 studies involving 28,470,249 participants with 530,041 incident AF cases were included. Adjusted risk of incident AF was greater among participants with lower eGFR than those with higher eGFR (eGFR<60 vs≥60mL/min/1.73m2: RR, 1.43; 95% CI, 1.30-1.57; and eGFR<90 vs≥90mL/min/1.73m2: RR, 1.42; 95% CI, 1.26-1.60). Adjusted incident AF risk was greater among participants with albuminuria (any albuminuria vs no albuminuria: RR, 1.43; 95% CI, 1.25-1.63; and moderately to severely increased albuminuria vs normal to mildly increased albuminuria: RR, 1.64; 95% CI, 1.31-2.06). Subgroup analyses showed an exposure-dependent association between CKD and incident AF, with the risk increasing progressively at lower eGFR and higher albuminuria categories. LIMITATIONS: Lack of patient-level data, interaction between eGFR and albuminuria could not be evaluated, possible ascertainment bias due to variation in the methods of AF detection. CONCLUSIONS: Lower eGFR and greater albuminuria were independently associated with increased risk of incident AF. CKD should be regarded as an independent risk factor for incident AF. PLAIN-LANGUAGE SUMMARY: Irregular heartbeat, or atrial fibrillation (AF), is the commonest abnormal heart rhythm. AF occurs commonly in people with chronic kidney disease (CKD), and CKD is also common in people with AF. However, CKD in not widely recognized as a risk factor for new-onset or incident AF. In this research, we combined data on more than 28 million participants in 38 studies to determine whether CKD itself increases the chances of incident AF. We found that both commonly used markers of kidney disease (estimated glomerular filtration rate and albuminuria, ie, protein in the urine) were independently associated with a greater risk of incident AF. This finding suggests that CKD should be recognized as an independent risk factor for incident AF.
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Fibrilación Atrial , Insuficiencia Renal Crónica , Adulto , Humanos , Fibrilación Atrial/epidemiología , Fibrilación Atrial/etiología , Fibrilación Atrial/diagnóstico , Albuminuria , Insuficiencia Renal Crónica/diagnóstico , Tasa de Filtración Glomerular , Factores de Riesgo , RiñónRESUMEN
BACKGROUND AND HYPOTHESIS: Finerenone, a non-steroidal mineralocorticoid receptor antagonist, improved kidney, and cardiovascular outcomes in patients with CKD and T2D in two Phase 3 outcome trials. The FIND-CKD study investigates the effect of finerenone in adults with CKD without diabetes. METHODS: FIND-CKD (NCT05047263 and EU CT 2023-506897-11-00) is a randomized, double-blind, placebo-controlled Phase 3 trial in patients with CKD of non-diabetic aetiology. Adults with a urinary albumin-creatinine ratio (UACR) of ≥ 200 to ≤3500 mg/g and eGFR ≥ 25 to <90 mL/min/1.73 m2 receiving a maximum tolerated dose of a renin-angiotensin-system (RAS) inhibitor were randomized 1:1 to once daily placebo or finerenone 10 or 20 mg depending on eGFR above or below 60 mL/min/1.73 m2. The primary efficacy outcome is total eGFR slope, defined as the mean annual rate of change in eGFR from baseline to Month 32. Secondary efficacy outcomes include a combined cardiorenal composite outcome comprising time to kidney failure, sustained ≥57% decrease in eGFR, hospitalization for heart failure, or cardiovascular death, as well as separate kidney and cardiovascular composite outcomes. Adverse events are recorded to assess tolerability and safety. RESULTS: Across 24 countries, 3231 patients were screened and 1584 were randomized to study treatment. The most common causes of CKD were chronic glomerulonephritis (57.0%) and hypertensive/ischaemic nephropathy (29.0%). Immunoglobulin A nephropathy was the most common glomerulonephritis (26.3% of the total population). At baseline, mean eGFR and median UACR were 46.7 mL/min/1.73 m2 and 818.9 mg/g, respectively. Diuretics were used by 282 participants (17.8%), statins by 851 (53.7%), and calcium channel blockers by 794 (50.1%). SGLT2 inhibitors were used in 16.9% of patients; these individuals had a similar mean eGFR (45.6 vs 46.8 mL/min/1.73 m2) and slightly higher median UACR (871.9 vs 808.3 mg/g) compared to those not using SGLT2 inhibitors at baseline. CONCLUSIONS: FIND-CKD is the first Phase 3 trial of finerenone in patients with CKD of non-diabetic aetiology.
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AIMS: To provide an overview of the primary outcomes and key clinical implications of the CANVAS Program and CREDENCE trial, which were event-driven, double-blind randomized controlled trials that established the efficacy and safety of canagliflozin in those with type 2 diabetes (T2D) and high cardiovascular risk (CV) or albuminuric chronic kidney disease (CKD). METHODS AND RESULTS: The CANVAS programme (CANVAS and CANVAS-R trials) randomized 10 142 people with T2D and high CV risk to canagliflozin or placebo and followed them for a median of 126 weeks. The primary efficacy outcome was met, with canagliflozin treatment associated with a 14% reduction in major adverse CV events (hazard ratio [HR] 0.86, 95% confidence interval [CI] 0.75 to 0.97; p < 0.001) as compared to placebo. The CREDENCE trial randomized 4401 individuals with T2D and albuminuric CKD to canagliflozin or placebo and followed them for 109 weeks. The CREDENCE trial also met its primary endpoint; canagliflozin treatment was associated with a 30% reduction in the composite of kidney failure, sustained doubling of serum creatinine level, or death from kidney or CV causes (HR 0.70, 95% CI 0.59 to 0.82; p < 0.001). Substantial reductions in hospitalization for heart failure (CANVAS: HR 0.67, 95% CI 0.52 to 0.87; CREDENCE: HR 0.61, 95% CI 0.47 to 0.80) and other key CV and kidney outcomes were also identified. Relative clinical benefits were consistent across subgroups defined by baseline age, sex, kidney function and history of CV disease but absolute benefits were greatest in those at highest baseline risk. Total serious adverse events were less common with canagliflozin treatment. Concerns about amputation and fracture risk observed in the CANVAS Program were not seen in CREDENCE and appear to have been spurious chance findings. CONCLUSION: Canagliflozin reduced important CV, kidney and mortality outcomes in those with T2D and high CV risk or CKD across diverse patient groups, with a good safety profile. Taken together with the other sodium-glucose cotransporter-2 inhibitor CV and renal outcomes trials, these landmark findings have changed the treatment landscape for patients worldwide.
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AIM: To validate the Klinrisk machine learning model for prediction of chronic kidney disease (CKD) progression in patients with type 2 diabetes in the pooled CANVAS/CREDENCE trials. MATERIALS AND METHODS: We externally validated the Klinrisk model for prediction of CKD progression, defined as 40% or higher decline in estimated glomerular filtration rate (eGFR) or kidney failure. Model performance was assessed for prediction up to 3 years with the area under the receiver operating characteristic curve (AUC), Brier scores and calibration plots of observed and predicted risks. We compared performance of the model with standard of care using eGFR (G1-G4) and urine albumin-creatinine ratio (A1-A3) Kidney Disease Improving Global Outcomes (KDIGO) heatmap categories. RESULTS: The Klinrisk model achieved an AUC of 0.81 (95% confidence interval [CI] 0.78-0.83) at 1 year, and 0.88 (95% CI 0.86-0.89) at 3 years. The Brier scores were 0.020 (0.018-0.022) and 0.056 (0.052-0.059) at 1 and 3 years, respectively. Compared with the KDIGO heatmap, the Klinrisk model had improved performance at every interval (P < .01). CONCLUSIONS: The Klinrisk machine learning model, using routinely collected laboratory data, was highly accurate in its prediction of CKD progression in the CANVAS/CREDENCE trials. Integration of the model in electronic medical records or laboratory information systems can facilitate risk-based care.
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Diabetes Mellitus Tipo 2 , Progresión de la Enfermedad , Tasa de Filtración Glomerular , Aprendizaje Automático , Insuficiencia Renal Crónica , Humanos , Insuficiencia Renal Crónica/diagnóstico , Insuficiencia Renal Crónica/fisiopatología , Insuficiencia Renal Crónica/orina , Masculino , Femenino , Persona de Mediana Edad , Diabetes Mellitus Tipo 2/complicaciones , Anciano , Nefropatías Diabéticas/diagnóstico , Nefropatías Diabéticas/fisiopatología , Nefropatías Diabéticas/orina , Medición de Riesgo/métodosRESUMEN
AIM: Sodium-glucose cotransporter 2 inhibitors (SGLT2is) and glucagon-like peptide-1 receptor agonists (GLP-1RAs) improve glycaemic control and cardio-renal outcomes for people with type 2 diabetes (T2D). However, geographic and socio-economic variation in use is not well understood. METHODS: We identified 367 829 New South Wales residents aged ≥40 years who dispensed metformin in 2020 as a proxy for T2D. We estimated the prevalence of use of other glucose-lowering medicines among people with T2D and the prevalence of SGLT2i and GLP-1RA use among people using concomitant T2D therapy (i.e. metformin + another glucose-lowering medicine). We measured the prevalence by small-level geography, stratified by age group, and characterized by remoteness and socio-economic status. RESULTS: The prevalence of SGLT2i (29.7%) and GLP-1RA (8.3%) use in people with T2D aged 40-64 increased with geographic remoteness and in areas of greater socio-economic disadvantage, similar to other glucose-lowering medicines. The prevalence of SGLT2i (55.4%) and GLP-1RA (15.4%) among people using concomitant T2D therapy varied across geographic areas, with lower SGLT2i use in more disadvantaged areas and localized areas of high GLP-1RA use (2.5 times the median). Compared with people aged 40-64 years, the prevalence of SGLT2i and GLP-1RA use was lower in older age groups, but with similar patterns of variation across geographic areas. CONCLUSIONS: The prevalence of SGLT2i and GLP-1RA use varied by geography, probably reflecting a combination of system- and prescriber-level factors. Socio-economic variation in GLP-1RA use was overshadowed by localized patterns of prescribing. Continued monitoring of variation can help shape interventions to optimize use among people who would benefit the most.
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Diabetes Mellitus Tipo 2 , Receptor del Péptido 1 Similar al Glucagón , Hipoglucemiantes , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Humanos , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/epidemiología , Persona de Mediana Edad , Inhibidores del Cotransportador de Sodio-Glucosa 2/uso terapéutico , Receptor del Péptido 1 Similar al Glucagón/agonistas , Masculino , Femenino , Nueva Gales del Sur/epidemiología , Adulto , Anciano , Hipoglucemiantes/uso terapéutico , Metformina/uso terapéuticoRESUMEN
SIGNIFICANCE STATEMENT: Angiotensin-converting enzyme (ACE) inhibitors and angiotensin receptor blockers (ARBs) are foundational therapy for CKD but are underused, in part because they are frequently withheld and not restarted due to hyperkalemia, AKI, or hospitalization. Consequently, ensuring persistent use of ACE inhibitors and ARBs in CKD has long been a major clinical priority. In this joint analysis of the CREDENCE and DAPA-CKD trials, the relative risk of discontinuation of ACE inhibitors and ARBs was reduced by 15% in patients randomized to sodium-glucose cotransporter 2 (SGLT2) inhibitors. This effect was more pronounced in patients with urine albumin:creatinine ratio ≥1000 mg/g, for whom the absolute benefits of these medications are the greatest. These findings indicate that SGLT2 inhibitors may enable better use of ACE inhibitors and ARBs in patients with CKD. BACKGROUND: Strategies to enable persistent use of renin-angiotensin system (RAS) blockade to improve outcomes in CKD have long been sought. The effect of SGLT2 inhibitors on discontinuation of RAS blockade has yet to be evaluated. METHODS: We conducted a joint analysis of canagliflozin and renal events in diabetes with established nephropathy clinical evaluation (CREDENCE) and dapagliflozin and prevention of adverse outcomes in CKD (DAPA-CKD), two randomized, double-blind, placebo-controlled, event-driven trials of SGLT2 inhibitors in patients with albuminuric CKD. The main outcome was time to incident temporary or permanent discontinuation of RAS blockade, defined as interruption of an ACE inhibitor or ARB for at least 4 weeks or complete cessation during the double-blind on-treatment period. Cox regression analyses were used to estimate the treatment effects from each trial. Hazard ratios (HRs) and corresponding 95% confidence intervals (CIs) were pooled with fixed effects meta-analysis to obtain summary treatment effects, overall and across key subgroups. RESULTS: During median follow-up of 2.2 years across both trials, 740 of 8483 (8.7%) patients discontinued RAS blockade. The relative risk for discontinuation of RAS blockade was 15% lower in patients randomized to receiving SGLT2 inhibitors (HR, 0.85; 95% CI, 0.74 to 0.99), with consistent effects across trials ( P -heterogeneity = 0.92). The relative effect on RAS blockade discontinuation was more pronounced among patients with baseline urinary albumin:creatinine ratio ≥1000 mg/g (pooled HR, 0.77; 95% CI, 0.63 to 0.94; P -heterogeneity = 0.009). CONCLUSIONS: In patients with albuminuric CKD with and without type 2 diabetes, SGLT2 inhibitors facilitate the use of RAS blockade. CLINICAL TRIAL REGISTRY NAME AND REGISTRATION NUMBER: ClinicalTrials.gov, NCT02065791 and NCT03036150 . PODCAST: This article contains a podcast at https://dts.podtrac.com/redirect.mp3/www.asn-online.org/media/podcast/JASN/2023_11_21_JASN0000000000000248.mp3.
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Diabetes Mellitus Tipo 2 , Insuficiencia Renal Crónica , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Humanos , Sistema Renina-Angiotensina , Inhibidores del Cotransportador de Sodio-Glucosa 2/farmacología , Inhibidores de la Enzima Convertidora de Angiotensina/uso terapéutico , Inhibidores de la Enzima Convertidora de Angiotensina/farmacología , Antagonistas de Receptores de Angiotensina/uso terapéutico , Antagonistas de Receptores de Angiotensina/farmacología , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Creatinina , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/tratamiento farmacológico , Insuficiencia Renal Crónica/inducido químicamente , Método Doble Ciego , Albúminas/farmacología , Ensayos Clínicos Controlados Aleatorios como AsuntoRESUMEN
BACKGROUND: Hyperkalemia increases risk of cardiac arrhythmias and death and limits the use of renin-angiotensin-aldosterone system inhibitors and mineralocorticoid receptor antagonists, which improve clinical outcomes in people with chronic kidney disease or systolic heart failure. Sodium-glucose cotransporter 2 (SGLT2) inhibitors reduce the risk of cardiorenal events in people with type 2 diabetes at high cardiovascular risk or with chronic kidney disease. However, their effect on hyperkalemia has not been systematically evaluated. METHODS: A meta-analysis was conducted using individual participant data from randomized, double-blind, placebo-controlled clinical outcome trials with SGLT2 inhibitors in people with type 2 diabetes at high cardiovascular risk or with chronic kidney disease in whom serum potassium levels were routinely measured. The primary outcome was time to serious hyperkalemia, defined as central laboratory-determined serum potassium ≥6.0 mmol/L, with other outcomes including investigator-reported hyperkalemia events and hypokalemia (serum potassium ≤3.5 mmol/L). Cox regression analyses were performed to estimate treatment effects from each trial with hazards ratios and corresponding 95% CIs pooled with random-effects models to obtain summary treatment effects, overall and across key subgroups. RESULTS: Results from 6 trials were included comprising 49 875 participants assessing 4 SGLT2 inhibitors. Of these, 1754 participants developed serious hyperkalemia, and an additional 1119 investigator-reported hyperkalemia events were recorded. SGLT2 inhibitors reduced the risk of serious hyperkalemia (hazard ratio, 0.84 [95% CI, 0.76-0.93]), an effect consistent across studies (Pheterogeneity=0.71). The incidence of investigator-reported hyperkalemia was also lower with SGLT2 inhibitors (hazard ratio, 0.80 [95% CI, 0.68-0.93]; Pheterogeneity=0.21). Reductions in serious hyperkalemia were observed across a range of subgroups, including baseline kidney function, history of heart failure, and use of renin-angiotensin-aldosterone system inhibitor, diuretic, and mineralocorticoid receptor antagonist. SGLT2 inhibitors did not increase the risk of hypokalemia (hazard ratio, 1.04 [95% CI, 0.94-1.15]; Pheterogeneity=0.42). CONCLUSIONS: SGLT2 inhibitors reduce the risk of serious hyperkalemia in people with type 2 diabetes at high cardiovascular risk or with chronic kidney disease without increasing the risk of hypokalemia.
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Diabetes Mellitus Tipo 2 , Hiperpotasemia , Hipopotasemia , Insuficiencia Renal Crónica , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Antihipertensivos/uso terapéutico , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Femenino , Glucosa , Humanos , Hiperpotasemia/inducido químicamente , Hiperpotasemia/epidemiología , Hipopotasemia/inducido químicamente , Hipopotasemia/epidemiología , Masculino , Antagonistas de Receptores de Mineralocorticoides/efectos adversos , Potasio , Ensayos Clínicos Controlados Aleatorios como Asunto , Insuficiencia Renal Crónica/tratamiento farmacológico , Insuficiencia Renal Crónica/epidemiología , Sodio , Inhibidores del Cotransportador de Sodio-Glucosa 2/efectos adversosRESUMEN
Doubling of serum creatinine (equivalent to a 57% decline in the estimated glomerular filtration rate (eGFR)) is an accepted component of a composite kidney endpoint in clinical trials. Smaller declines in eGFR (40%, 50%) have been applied in several recently conducted clinical trials. Here, we assessed the effects of newer kidney protective agents on endpoints including smaller proportional declines in eGFR to compare relative event rates and the magnitude of observed treatment effects. We performed a post hoc analysis of 4401 patients in the CREDENCE, 4304 in the DAPA-CKD, 5734 in the FIDELIO-DKD, and 3668 in the SONAR trials, which assessed the effects of canagliflozin, dapagliflozin, finerenone and atrasentan in patients with chronic kidney disease. Effects of active therapies versus placebo on alternative composite kidney endpoints incorporating different eGFR decline thresholds (40%, 50%, or 57% eGFR reductions from baseline) with kidney failure or death due to kidney failure were compared. Cox-proportional hazards regression models were used to assess and compare treatment effects. During follow-up, event rates were higher for endpoints incorporating smaller versus larger eGFR decline thresholds. Compared to the treatment effects on kidney failure or death due to kidney failure, the magnitude of relative treatment effects was generally similar when considering composite endpoints incorporating smaller declines in eGFR. Hazard ratios for the four interventions ranged from 0.63 to 0.82 for the endpoint incorporating 40% eGFR decline and 0.59 to 0.76 for the endpoint incorporating 57% eGFR decline. Clinical trials incorporating a 40% eGFR decline in a composite endpoint would require approximately half the number of participants compared to a 57% eGFR decline with equivalent statistical power. Thus, in populations at high risk of CKD progression, the relative effects of newer kidney protective therapies appear generally similar across endpoints based on varying eGFR decline thresholds.
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Diabetes Mellitus Tipo 2 , Insuficiencia Renal Crónica , Humanos , Insuficiencia Renal Crónica/tratamiento farmacológico , Canagliflozina/uso terapéutico , Tasa de Filtración Glomerular , Riñón , Diabetes Mellitus Tipo 2/tratamiento farmacológicoRESUMEN
BACKGROUND: This post-hoc analysis of the DELIGHT trial assessed effects of the SGLT2 inhibitor dapagliflozin on iron metabolism and markers of inflammation. METHODS: Patients with type 2 diabetes and albuminuria were randomized to dapagliflozin, dapagliflozin and saxagliptin, or placebo. We measured hemoglobin, iron markers (serum iron, transferrin saturation, and ferritin), plasma erythropoietin, and inflammatory markers (urinary MCP-1 and urinary/serum IL-6) at baseline and week 24. RESULTS: 360/461 (78.1%) participants had available biosamples. Dapagliflozin and dapagliflozin-saxagliptin, compared to placebo, increased hemoglobin by 5.7 g/L (95%CI 4.0, 7.3; p < 0.001) and 4.4 g/L (2.7, 6.0; p < 0.001) and reduced ferritin by 18.6% (8.7, 27.5; p < 0.001) and 18.4% (8.7, 27.1; p < 0.001), respectively. Dapagliflozin reduced urinary MCP-1/Cr by 29.0% (14.6, 41.0; p < 0.001) and urinary IL-6/Cr by 26.6% (9.1, 40.7; p = 0.005) with no changes in other markers. CONCLUSIONS: Dapagliflozin increased hemoglobin and reduced ferritin and urinary markers of inflammation, suggesting potentially important effects on iron metabolism and inflammation. TRIAL REGISTRATION: ClinicalTrials.gov NCT02547935.
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Diabetes Mellitus Tipo 2 , Insuficiencia Renal Crónica , Humanos , Diabetes Mellitus Tipo 2/diagnóstico , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Hierro/metabolismo , Hierro/uso terapéutico , Eritropoyesis , Interleucina-6/metabolismo , Hipoglucemiantes/uso terapéutico , Compuestos de Bencidrilo/efectos adversos , Hemoglobinas/metabolismo , Hemoglobinas/uso terapéutico , Insuficiencia Renal Crónica/diagnóstico , Insuficiencia Renal Crónica/tratamiento farmacológico , Inflamación/diagnóstico , Inflamación/tratamiento farmacológico , Ferritinas , Método Doble CiegoRESUMEN
AIMS: To investigate the extent to which improvements in multiple cardiovascular risk markers are associated with a lower risk of cardiovascular and kidney outcomes in patients with type 2 diabetes and high cardiovascular risk participating in the CANVAS programme. MATERIALS AND METHODS: Clinically relevant improvements in cardiovascular risk factors were defined as a reduction in glycated haemoglobin ≥1.0%, systolic blood pressure ≥10 mmHg, body weight ≥3 kg, urinary-albumin-creatinine ratio ≥30%, uric acid ≥0.5 mg/dl, and an increase in haemoglobin of ≥1.0 g/dl from baseline to week 26. Participants were categorized according to the number of improvements in cardiovascular risk markers: zero, one, two, three, or four or more risk marker improvements. The Cox proportional hazard regression adjusted for treatment assignment, demographic variables and laboratory measurements was performed to determine the association between the number of risk marker improvements and risk of a composite cardiovascular, heart failure or kidney outcomes. RESULTS: We included 9487 (93.5%) participants with available data at baseline and week 26. After week 26, 566 composite cardiovascular, 370 heart failure/cardiovascular death and 153 composite kidney outcomes occurred. The multivariable adjusted hazard ratios associated with four or more improvements in risk markers versus no risk marker improvement were 0.67 (95% CI 0.48, 0.92), 0.58 (95% CI 0.39, 0.87) and 0.49 (95% CI 0.25, 0.96) for the three outcomes respectively. We observed a trend of decreased hazard ratios across subgroups of increasing number of risk marker improvements (p for trend = .008, .02 and .047, respectively). CONCLUSIONS: In patients with type 2 diabetes, improvements in multiple risk markers were associated with a reduced risk of cardiovascular and kidney outcomes as compared with no risk marker improvement.
Asunto(s)
Enfermedades Cardiovasculares , Sistema Cardiovascular , Diabetes Mellitus Tipo 2 , Insuficiencia Cardíaca , Humanos , Canagliflozina/efectos adversos , Insuficiencia Cardíaca/complicaciones , Riñón , Enfermedades Cardiovasculares/epidemiología , Enfermedades Cardiovasculares/etiología , Enfermedades Cardiovasculares/prevención & controlRESUMEN
AIM: To assess the effects of canagliflozin on clinical outcomes and intermediate markers across population-specific body mass index (BMI) categories in the CANVAS Program and CREDENCE trial. METHODS: Individual participant data were pooled and analysed in subgroups according to population-specific BMI. The main outcomes of interest were: major adverse cardiovascular events (MACE, a composite of nonfatal myocardial infarction, nonfatal stroke or cardiovascular death); composite renal outcome; and changes in systolic blood pressure (SBP), body weight, albuminuria and estimated glomerular filtration rate (eGFR) slope. Cox proportional hazards models and mixed-effect models were used. RESULTS: A total of 14 520 participants were included, of whom 9378 (65%) had obesity. Overall, canagliflozin reduced the risk of MACE (hazard ratio [HR] 0.83, 95% confidence interval [CI] 0.75 to 0.93) with no heterogeneity of treatment effect across BMI subgroups (Pheterogeneity = 0.76). Similarly, canagliflozin reduced composite renal outcomes (HR 0.75, 95% CI 0.66 to 0.84) with no heterogeneity across subgroups observed (Pheterogeneity = 0.72). The effects of canagliflozin on body weight and SBP differed across BMI subgroups (Pheterogeneity <0.01 and 0.04, respectively) but were consistent for albuminuria (Pheterogeneity = 0.60). Chronic eGFR slope with canagliflozin treatment was consistent across subgroups (Pheterogeneity >0.95). CONCLUSIONS: The cardiovascular and renal benefits of canagliflozin and its safety profile were consistent across population-specific BMI subgroups for adults in the CANVAS Program and CREDENCE trial.
Asunto(s)
Enfermedades Cardiovasculares , Diabetes Mellitus Tipo 2 , Infarto del Miocardio , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Adulto , Humanos , Canagliflozina/efectos adversos , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/inducido químicamente , Índice de Masa Corporal , Inhibidores del Cotransportador de Sodio-Glucosa 2/uso terapéutico , Albuminuria/tratamiento farmacológico , Enfermedades Cardiovasculares/epidemiología , Enfermedades Cardiovasculares/prevención & control , Enfermedades Cardiovasculares/inducido químicamente , Peso Corporal , Infarto del Miocardio/tratamiento farmacológicoRESUMEN
AIM: To estimate the lifetime benefit of a combination treatment of sodium-glucose co-transporter 2 (SGLT2) inhibitors and mineralocorticoid-receptor antagonists (MRA) in patients with type 2 diabetes and chronic kidney disease (CKD). MATERIALS AND METHODS: The cumulative effect of combination treatment was derived from trial-level estimates of the effect of an SGLT2 inhibitor (canagliflozin) and MRA (finerenone) from the CREDENCE (N = 4401) and FIDELIO (N = 5734) trials, respectively. The cumulative effect was applied to the control group of patients with type 2 diabetes in the DAPA-CKD trial (N = 1451) to estimate long-term gains in event-free and overall survival. The analysis was repeated in an observational study. The primary outcome was a composite endpoint of doubling of serum creatinine, end-stage kidney disease or death because of kidney failure. RESULTS: The hazard ratio of combination treatment for the primary outcome was 0.50 [95% confidence interval (CI): 0.44, 0.57]. At age 50 years, the estimated event-free survival from the primary outcome was 16.7 years (95% CI: 18.1, 21.0) with combination treatment versus 10.0 years (95% CI: 6.8, 12.3) with angiotensin-converting enzyme inhibitors/angiotensin receptor blockers resulting in an incremental gain of 6.7 years (95% CI: 5.5, 7.9). In an observational study, the estimated gain in event-free survival regarding primary outcome was 6.3 years (95% CI: 5.2, 7.3). In a conservative scenario, assuming low adherence (70% of the observed adherence) and less pronounced efficacy (70% of the observed efficacy with 2% yearly decline) of combination therapy, gain in event-free survival regarding primary outcome was 2.5 years (95% CI: 2.0, 2.9). CONCLUSIONS: Combined disease-modifying treatment with an SGLT2 inhibitor and MRA in patients with type 2 diabetes and CKD may substantially increase the number of years free from kidney failure and mortality.
Asunto(s)
Diabetes Mellitus Tipo 2 , Fallo Renal Crónico , Insuficiencia Renal Crónica , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Humanos , Persona de Mediana Edad , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/inducido químicamente , Inhibidores del Cotransportador de Sodio-Glucosa 2/uso terapéutico , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/tratamiento farmacológico , Insuficiencia Renal Crónica/epidemiología , Fallo Renal Crónico/complicaciones , Fallo Renal Crónico/epidemiología , Fallo Renal Crónico/prevención & control , Canagliflozina/uso terapéutico , Antagonistas de Receptores de Mineralocorticoides/uso terapéuticoRESUMEN
AIM: In the CANVAS Program and CREDENCE trials, the sodium glucose co-transporter 2 inhibitor canagliflozin reduced the risk of cardiovascular and kidney events in patients with type 2 diabetes. The current study analysed a pooled population to ascertain the kidney protection provided by canagliflozin across the full spectrum of kidney parameters. METHODS: This post-hoc pooled analysis of the CANVAS Program (N = 10 142) and CREDENCE trial (N = 4401), assessed the risk of the primary kidney composite (doubling of serum creatinine, end-stage kidney disease, renal death), in all patients and subgroups defined by baseline estimated glomerular filtration rate (<30, 30 to <45, 45 to <60 and ≥60 ml/min/1.73 m2 ), albuminuria [<30, 30-300, >300 mg/g (<3.39, 3.39-33.9, >33.9 mg/mmol)] and 2012 Kidney Disease: Improving Global Outcomes (KDIGO) classification of chronic kidney disease (low/moderate, high and very high risk). RESULTS: In the overall population, the risk for the primary kidney composite outcome was 37% lower in the canagliflozin group versus placebo (HR: 0.63; 95% CI: 0.53, 0.77; p < .001). There was no evidence of heterogeneity in the kidney protective effects of canagliflozin across a range of kidney risks when stratified by baseline estimated glomerular filtration rate, albuminuria or KDIGO risk category (all pinteraction > .05). A statistically significant risk reduction of the primary kidney composite outcome was sustained by approximately 18 months after randomization. CONCLUSIONS: These results emphasize a critical role of canagliflozin in kidney protection across a broad spectrum of participants with type 2 diabetes with varying levels of kidney function.
Asunto(s)
Enfermedades Cardiovasculares , Diabetes Mellitus Tipo 2 , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Humanos , Canagliflozina/uso terapéutico , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/inducido químicamente , Albuminuria/prevención & control , Albuminuria/tratamiento farmacológico , Enfermedades Cardiovasculares/epidemiología , Riñón , Inhibidores del Cotransportador de Sodio-Glucosa 2/efectos adversosRESUMEN
AIMS: To assess whether the sodium-glucose cotransporter-2 (SGLT2) inhibitor canagliflozin affects risk of non-genital skin and soft tissue infections (SSTIs). MATERIALS AND METHODS: We performed a post hoc pooled individual participant analysis of the CANVAS Program and CREDENCE trials that randomized people with type 2 diabetes at high cardiovascular risk and/or with chronic kidney disease to either canagliflozin or placebo. Investigator-reported adverse events were assessed by two blinded authors following predetermined criteria for non-genital SSTIs. Risks of non-genital SSTIs, overall and within prespecified subgroups, and risk of non-genital fungal SSTIs, were analysed using Cox regression models. Factors associated with non-genital SSTIs were assessed using multivariable Cox regression models. RESULTS: Overall, 903 of 14 531 participants (6%) experienced non-genital SSTIs over a median follow-up of 26 months. No difference was observed in non-genital SSTI rates between canagliflozin and placebo (24.0 events/1000 person-years vs. 23.9 events/1000 person-years, respectively; hazard ratio [HR] 0.97, 95% confidence interval [CI] 0.85-1.11; P = 0.70), with consistent results across subgroups (all P interaction > 0.05). The risk of recurrent events and non-genital fungal infection also did not differ significantly between canagliflozin and placebo (HR 1.06, 95% CI 0.94-1.19 [P = 0.32] and HR 1.18, 95% CI 0.88-1.60 [P = 0.27], respectively). Baseline factors independently associated with non-genital SSTIs were younger age, male sex, higher body mass index, higher glycated haemoglobin, lower estimated glomerular filtration rate (eGFR), established peripheral vascular disease, and history of neuropathy. CONCLUSIONS: Canagliflozin did not affect risk of non-genital SSTIs or non-genital fungal SSTIs compared with placebo. These findings suggest that any SGLT2 inhibitor-mediated change in skin microenvironment is unlikely to have meaningful clinical consequences.
Asunto(s)
Enfermedades Cardiovasculares , Diabetes Mellitus Tipo 2 , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Infecciones de los Tejidos Blandos , Humanos , Masculino , Canagliflozina/efectos adversos , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/inducido químicamente , Inhibidores del Cotransportador de Sodio-Glucosa 2/efectos adversos , Infecciones de los Tejidos Blandos/inducido químicamente , Glucosa/uso terapéutico , Sodio , Enfermedades Cardiovasculares/complicacionesRESUMEN
PURPOSE OF REVIEW: Sodium glucose transporter 2 inhibitors (SGLT2 inhibitors) are increasingly prescribed due to their considerable benefits on clinical outcomes in people with diabetes, heart failure, and chronic kidney disease (CKD). Hypertension is a common comorbidity in each of these disease states, increasing risk of cardiovascular morbidity and mortality. We herein review the effects of SGLT2 inhibitors on blood pressure in different populations, proposed mechanisms of action, and the contribution of blood pressure lowering to end-organ protection. RECENT FINDINGS: A recognised effect of SGLT2 inhibitors in recent clinical trials is blood pressure lowering, with multiple postulated mechanisms. This advantageous effect was first identified in populations with type 2 diabetes mellitus, prior to expansion of these trials to broader cohorts. On our review, we identified that the blood pressure lowering effect of SGLT2 inhibitors appears to be a dose-independent class-effect, with a magnitude of effect comparable to that seen with a low dose hydrochlorothiazide. There is considerable evidence demonstrating that this effect is observed across populations including those with type 2 diabetes mellitus, chronic kidney disease, and resistant hypertension.
Asunto(s)
Diabetes Mellitus Tipo 2 , Hipertensión , Insuficiencia Renal Crónica , Inhibidores del Cotransportador de Sodio-Glucosa 2 , Humanos , Inhibidores del Cotransportador de Sodio-Glucosa 2/farmacología , Inhibidores del Cotransportador de Sodio-Glucosa 2/uso terapéutico , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Hipoglucemiantes , Presión Sanguínea/fisiología , Hipertensión/tratamiento farmacológico , Insuficiencia Renal Crónica/complicaciones , Insuficiencia Renal Crónica/tratamiento farmacológicoRESUMEN
BACKGROUND: Acute changes in GFR can occur after initiation of interventions targeting progression of CKD. These acute changes complicate the interpretation of long-term treatment effects. METHODS: To assess the magnitude and consistency of acute effects in randomized clinical trials and explore factors that might affect them, we performed a meta-analysis of 53 randomized clinical trials for CKD progression, enrolling 56,413 participants with at least one estimated GFR measurement by 6 months after randomization. We defined acute treatment effects as the mean difference in GFR slope from baseline to 3 months between randomized groups. We performed univariable and multivariable metaregression to assess the effect of intervention type, disease state, baseline GFR, and albuminuria on the magnitude of acute effects. RESULTS: The mean acute effect across all studies was -0.21 ml/min per 1.73 m2 (95% confidence interval, -0.63 to 0.22) over 3 months, with substantial heterogeneity across interventions (95% coverage interval across studies, -2.50 to +2.08 ml/min per 1.73 m2). We observed negative average acute effects in renin angiotensin system blockade, BP lowering, and sodium-glucose cotransporter 2 inhibitor trials, and positive acute effects in trials of immunosuppressive agents. Larger negative acute effects were observed in trials with a higher mean baseline GFR. CONCLUSION: The magnitude and consistency of acute GFR effects vary across different interventions, and are larger at higher baseline GFR. Understanding the nature and magnitude of acute effects can help inform the optimal design of randomized clinical trials evaluating disease progression in CKD.
Asunto(s)
Tasa de Filtración Glomerular/efectos de los fármacos , Insuficiencia Renal Crónica/tratamiento farmacológico , Insuficiencia Renal Crónica/fisiopatología , Albuminuria/tratamiento farmacológico , Albuminuria/orina , Antihipertensivos/uso terapéutico , Creatinina/orina , Progresión de la Enfermedad , Femenino , Humanos , Inmunosupresores/uso terapéutico , Masculino , Ensayos Clínicos Controlados Aleatorios como Asunto , Sistema Renina-Angiotensina/efectos de los fármacos , Inhibidores del Cotransportador de Sodio-Glucosa 2/uso terapéuticoRESUMEN
BACKGROUND: People with type 2 diabetes and chronic kidney disease experience a high burden of hypertension, but the magnitude and consistency of blood pressure (BP) lowering with canagliflozin in this population are uncertain. Whether the effects of canagliflozin on kidney and cardiovascular outcomes vary by baseline BP or BP-lowering therapy is also unknown. METHODS: The CREDENCE trial (Canagliflozin and Renal Events in Diabetes with Established Nephropathy Clinical Evaluation) randomized people with type 2 diabetes and chronic kidney disease to canagliflozin or placebo. In a post hoc analysis, we investigated the effect of canagliflozin on systolic BP across subgroups defined by baseline systolic BP, number of BP-lowering drug classes, and history of apparent treatment-resistant hypertension (BP ≥130/80 mm Hg while receiving ≥3 classes of BP-lowering drugs, including a diuretic). We also assessed whether effects on clinical outcomes differed across these subgroups. RESULTS: The trial included 4401 participants, of whom 3361 (76.4%) had baseline systolic BP ≥130 mm Hg, and 1371 (31.2%) had resistant hypertension. By week 3, canagliflozin reduced systolic BP by 3.50 mm Hg (95% CI, -4.27 to -2.72), an effect maintained over the duration of the trial, with similar reductions across BP and BP-lowering therapy subgroups (all P interaction ≥0.05). Canagliflozin also reduced the need for initiation of additional BP-lowering agents during the trial (hazard ratio, 0.68 [95% CI, 0.61-0.75]). The effect of canagliflozin on kidney failure, doubling of serum creatinine, or death caused by kidney or cardiovascular disease (hazard ratio, 0.70 [95% CI, 0.59-0.82]) was consistent across BP and BP-lowering therapy subgroups (all P interaction ≥0.35), as were effects on other key kidney, cardiovascular, and safety outcomes. CONCLUSIONS: In people with type 2 diabetes and chronic kidney disease, canagliflozin lowers systolic BP across all BP-defined subgroups and reduces the need for additional BP-lowering agents. These findings support use of canagliflozin for end-organ protection and as an adjunct BP-lowering therapy in people with chronic kidney disease. Registration: URL: https://www.clinicaltrials.gov; Unique identifier: NCT02065791.