Navdeep Tangri

University of Manitoba | UMN · Department of Internal Medicine

Purpose of review Kidney disease is present in almost half of Canadian patients with type 2 diabetes (T2D), and it is also the most common first cardiorenal manifestation of T2D. Despite clear guidelines for testing, opportunities are being missed to identify kidney diseases, and many Canadians are therefore not receiving the best available treatme...

Introduction The percentage of patients initiating dialysis at an estimated glomerular filtration rate (eGFR) ≤9 mL/min/1.73 m2 decreased between 2000 and 2018 in the United States. Clinical practice guidelines recommend basing the decision to initiate dialysis primarily on uremic signs and symptoms, rather than on a particular level of kidney func...

Background: Frailty is common in patients with chronic kidney disease (CKD), as is its physical component, phenotypic frailty, and each contributes to CKD-related disability and are associated with increased mortality. Chronic kidney disease has been described as a model of premature aging and its phenotypic frailty shares features with that which...

Hyperkalemia (serum potassium [K+] ≥5.1) is life-threatening in patients diagnosed with end stage kidney disease (ESKD). Patiromer is approved for the treatment of hyperkalemia, although its role in hyperkalemic patients with ESKD is not well understood. This study describes real-world patiromer utilization in an ESKD population and its correspondi...

Chronic kidney disease (CKD) is a major public health issue, with the global prevalence currently estimated to range between 8.7% and 18.4%. This chapter reviews conventional biomarkers, novel biomarkers, and recently validated risk scores for predicting CKD progression and outcomes. For patients with CKD, biomarkers may reflect changes in renal fu...

Purpose of review The Kidney Research Scientist Core Education and National Training (KRESCENT) is a national Canadian training program for kidney scientists, funded by the Kidney Foundation of Canada (KFOC), the Canadian Institutes of Health Research (CIHR), and the Canadian Society of Nephrology (CSN). We describe our first year of incorporating...

Background: Volume overload is a common complication encountered in hospitalized patients, and the mainstay of therapy is diuresis. Unfortunately, the diuretic response in some individuals is inadequate despite a typical dose of loop diuretics, a phenomenon called diuretic resistance. An accurate prediction model that predicts diuretic resistance...

Introduction: Metabolic acidosis is associated with chronic kidney disease (CKD) progression and mortality, but the association of race/ethnicity with incident metabolic acidosis and/or its adverse outcomes in patients with CKD is unknown. Methods: We used deidentified medical records data (2007-2019) to generate a cohort of 136,067 patients wit...

Background: Guidelines recommend treatment of metabolic acidosis (MA) in patients with chronic kidney disease (CKD), but diagnosis and treatment rates in real-world settings are unknown. We investigated the frequency of MA treatment and diagnosis in patients with CKD. Methods: In this retrospective cohort study, we examined administrative health...

Rationale & Objective Identification of treatable risk factors for kidney allograft failure is necessary to improve graft longevity. Metabolic acidosis with either low serum bicarbonate or normal serum bicarbonate (eubicarbonatemic metabolic acidosis) is implicated in native kidney disease progression but its effects in kidney transplant recipients...

Aims: The aim of this study was to determine the comparative effectiveness and safety of direct oral anticoagulants (DOACs) and warfarin in adults with atrial fibrillation (AF) by level of kidney function. Methods and results: We pooled findings from 5 retrospective cohorts (2011-2018) across Australia and Canada of adults with; a new dispensati...

Introduction: Chronic kidney disease (CKD) is a serious condition associated with significant morbidity and healthcare costs. Despite this, early-stage CKD is often undiagnosed, and globally there is substantial variation in the effectiveness of screening and subsequent management. Microsimulations can estimate future epidemiological costs, provid...

Chronic kidney disease (CKD) is a progressive condition that can lead to kidney failure and the requirement for renal dialysis or transplantation. Early-stage CKD is often missed because the disorder is initially asymptomatic; hence, many patients with CKD already have symptomatic advanced disease (Stages G4–G5) at the time of diagnosis. This is an...

Rationale & Objective The National Kidney Foundation (NKF) launched the first national U.S. kidney disease patient registry, the NKF Patient Network, opened to patients throughout the continuum of chronic kidney disease (CKD). The Network provides individualized education, and will facilitate patient-centered research, clinical care, and health pol...

Background and objectives Gender-affirming hormone therapy modifies body composition and lean muscle mass in transgender persons. We sought to characterize the change in serum creatinine, other kidney function biomarkers, and GFR in transgender persons initiating masculinizing and feminizing gender-affirming hormone therapy. Design, setting, parti...

In the past decade, advances in the validation of surrogate end points for chronic kidney disease (CKD) progression have heightened interest in evaluating therapies in early CKD. In December 2020, the National Kidney Foundation sponsored a scientific workshop in collaboration with the US Food and Drug Administration (FDA) to explore patient, provid...

Rationale & Objective To what degree and how patient navigators improve clinical outcomes for patients with chronic kidney disease (CKD) and kidney failure is uncertain. We performed a systematic review to summarize patient navigator program design, evidence, and implementation in kidney disease. Study Design A search strategy was developed for ra...

Background Cannabis is frequently used recreationally and medicinally including for symptom management in patients with kidney disease. Methods We elicited the views of Canadian adults with kidney disease regarding their cannabis use. Participants were asked whether they would try cannabis for anxiety, depression, restless legs, itchiness, fatigue...

OBJECTIVE To predict adverse kidney outcomes for use in optimizing medical management and clinical trial design. RESEARCH DESIGN AND METHODS In this meta-analysis of individual participant data, 43 cohorts (N = 1,621,817) from research studies, electronic medical records, and clinical trials with global representation were separated into developme...

Background Resistant starches (RSs) are not digested by human digestive enzymes and pass through the upper digestive tract to become substrates for colonic bacteria. Resistant starch supplementation has shown promising results in altering the microbiota of animal models of chronic kidney disease (CKD). Resistant starch consumption may influence the...

Introduction Metabolic acidosis in patients with chronic kidney disease (CKD) results from a loss of kidney function. It has been associated with CKD progression, all-cause mortality, and other adverse outcomes. We aimed to determine whether metabolic acidosis is associated with a higher risk of acute kidney injury (AKI). Methods This was a retros...

Background Digital healthcare systems data could provide insights into the global prevalence of chronic kidney disease (CKD). We designed the CaReMe CKD study to estimate the prevalence, key clinical adverse outcomes and costs of CKD across 11 countries. Methods Individual-level data of a cohort of 2·4 million contemporaneous CKD patients was obta...

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BACKGROUND AND AIMS Chronic kidney disease (CKD) is a serious progressive disease with a substantial impact on global health that affects ∼10% of the world's population. However, CKD remains largely under-recognized. Effective actions to slow disease progression and improve outcomes depend on timely detection and diagnosis before a further decline...

BACKGROUND AND AIMS Nephrologists follow patients with chronic kidney disease (CKD) stage G3 and G4 as a homogeneous group with the assumption that everyone had similar rates of progression with scheduled visits and lab investigations based on the stage of the disease. We now recognize that not all patients progress at similar rates to kidney failu...

Rationale & Objective Race-free eGFR equations incorporating creatinine with and without cystatin C were recently developed and recommended for routine use. However, the performance of these equations among kidney transplant recipients remains unknown. Study Design Cross-sectional study to validate the new race-free CKD-EPI equations (2021 CKD-EPI...

Albumin-to-creatinine ratio (ACR), the preferred method to quantify proteinuria, can be calculated from urine dipstick protein or protein-to-creatinine ratio (PCR). The performance of calculated vs. measured ACR in predicting kidney failure and death without kidney failure in people with chronic kidney disease (CKD) is unknown. Here, we used popula...

Background and objectives: Home dialysis therapies (peritoneal and home hemodialysis) are less expensive and provide similar outcomes to in-center hemodialysis, but they are underutilized in most health systems. Given this, we designed a multifaceted intervention to increase the use of home dialysis. In this study, our objective was to evaluate th...

Background Sodium and calcium polystyrene sulfonate (SPS/CPS) cation-exchange resins have had long-standing clinical use for hyperkalemia in patients with chronic kidney disease (CKD). However, uncertainty exists regarding the real-world usage of SPS/CPS for acute and chronic management of hyperkalemia. We evaluated the prescription patterns of SPS...

Background The risk of adverse geriatric outcomes such as falls and fractures is high among patients with chronic kidney disease (CKD). Metabolic acidosis is associated with protein catabolism and bone loss in experimental animal and human studies. We sought to quantify the independent association of metabolic acidosis with adverse muscle, bone, an...

Although Chronic Kidney Disease is common, only a relatively small proportion of individuals will reach kidney failure requiring dialysis or transplantation. Validated risk equations using routine laboratory tests have been developed that can easily be used at the bedside to help clinicians accurately predict the risk of kidney failure in their pat...

Background Globally, the prevalence of chronic kidney disease (CKD) is higher in women than in men; however, women have been historically under-represented in nephrology clinical trials. Metabolic acidosis increases risk of progressive loss of kidney function, causes bone demineralization and muscle protein catabolism, and may be more consequential...

Purpose of review: Chronic kidney disease (CKD) and acute kidney injury (AKI) are global public health problems associated with a significant burden of morbidity, healthcare resource use, and all-cause mortality. This review explores recently published studies that take a machine learning approach to the diagnosis, management, and prognostication...

Rationale & Objective Renin-Angiotensin-Aldosterone system inhibitors (RAASi) are evidence-based therapies that slow the progression of Chronic Kidney Disease (CKD) but can cause hyperkalemia. We aimed to evaluate the association of discontinuing RAASi’s after an episode of hyperkalemia and clinical outcomes in patients with CKD. Study Design Retr...

Background Chronic kidney disease (CKD) is associated with a reduced quality of life and an increased risk of kidney failure, cardiovascular events, and all-cause mortality. Accumulation of nitrogen-based uremic toxins leads to worsening of symptoms in individuals with CKD. Many uremic toxins, such as indoxyl and p-cresol sulphate, are produced exc...

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Background and objectives Patients with CKD exhibit heterogeneity in their rates of progression to kidney failure. The kidney failure risk equation (KFRE) has been shown to accurately estimate progression to kidney failure in adults with CKD. Our objective was to determine health care utilization patterns of patients on the basis of their risk of p...

Purpose of review: The objective of this review is to discuss if chronic kidney disease (CKD) leads to chronic heart failure (CHF), and does worsening CHF lead to CKD progression and how a new medication class can modify the risk of both outcomes. Recent findings: Sodium-glucose cotransporter 2 (SGLT2) inhibitors are similarly effective on cardi...

Background: Opioid analgesics are among the most commonly prescribed medications, but questions remain regarding their impact on the day-to-day functioning of patients including driving. We set out to perform a systematic review on the risk of motor vehicle collision (MVC) associated with prescription opioid exposure. Method: We searched Medline, P...

Background Timely diagnosis and treatment of stage 3 chronic kidney disease (CKD) can prevent further loss of kidney function and progression to kidney failure. However, contemporary data on the global prevalence of undiagnosed stage 3 CKD are scarce. REVEAL-CKD is a multinational, multifocal observational study aiming to provide insights into undi...

Introduction Metformin is the initial oral antihyperglycemic agent (OHA) of choice for most patients with type 2 diabetes (T2D). However, more than one agent is often required for optimal glucose control. As the choice of preferred second OHAs is less well defined, we sought to compare the real-world safety of sulfonylureas to other OHAs as add-on...

Introduction Interventions that increase physical activity behavior can reduce morbidity and prolong life, but long-term effects in large populations are unproven. This study investigates the association of medical fitness facility membership and frequency of attendance with all-cause mortality and rate of hospitalization. Methods A propensity wei...

Background Home-based peritoneal dialysis (PD) is an alternative to facility-based hemodialysis and has lower costs and greater freedom for patients with kidney failure. For a patient to undergo PD, a safe and reliable method of accessing the peritoneum is needed. However, different catheter insertion techniques may affect patient health outcomes....

Background and objectives Although progressive decline in physical activity and function are common in individuals with worsening CKD, little is known about the effect of dialysis initiation on physical activity. We assessed for any association of progression to dialysis in people with advanced CKD with temporal rates of change in physical activity...

Introduction The Kidney Failure Risk Equation (KFRE) is a clinical tool widely used to predict progression from chronic kidney disease (CKD) to kidney failure. This study aimed to examine the effect of age on KFRE performance in advanced CKD. Methods We conducted a retrospective cohort study among 1,701 consecutive patients referred to an advanced...

Rationale & Objective The four-variable kidney failure risk equation (KFRE) allows for chronic kidney disease (CKD) progression prediction, using age, sex, estimated glomerular filtration rate (eGFR), and urine albumin/creatinine ratio (UACR). Electronic health records (EHRs) enable KFRE auto-calculation and registries allow population-level applic...

Background: Chronic kidney disease (CKD) is associated with a reduced quality of life and an increased risk of kidney failure, cardiovascular events, and all-cause mortality. Accumulation of nitrogen-based uremic toxins leads to worsening of symptoms in individuals with CKD. Many uremic toxins, such as indoxyl and p-cresol sulphate, are produced ex...

Background: Randomized, controlled cardiovascular outcome trials may not be fully representative of the management of patients with type 2 diabetes across different geographic regions. We conducted analyses of data from the multinational CVD-REAL consortium to determine the association between initiation of sodium-glucose cotransporter-2 inhibitor...

Background: In 2013-2015, we conducted point-of-care screening for hypertension, diabetes and chronic kidney disease in rural and remote Indigenous communities in Manitoba, Canada. In this study, we aimed to determine whether optimal follow-up care was provided, defined as proportion of individuals with appropriate kidney disease laboratory testin...

Background Polypharmacy, often defined as the concomitant use of ≥ 5 medications, has been identified as a significant global public health threat. Aging and multimorbidity are key drivers of polypharmacy and have been linked to a broad range of adverse health outcomes and mortality. Patients with chronic kidney disease (CKD) are particularly at hi...

Rationale and Objective The prevalence of kidney failure is increasing globally. Most of these patients will require life-sustaining dialysis at a substantial cost to the health care system. Assisted peritoneal dialysis (PD) and assisted home hemodialysis (HD) are potential alternatives to in-center HD and have demonstrated equivalent outcomes with...

Purpose: Treatment selection for localized prostate cancer is guided by risk stratification and patient preferences. While socioeconomic status (SES) disparities exist for access to care, less is known on the effect of SES on treatment decision making. We sought to evaluate whether income status was associated with the treatment selected (radical...

Importance The burden of chronic kidney disease (CKD) is expected to increase worldwide as the global population ages, potentially increasing the demand for nephrology services. Understanding whether CKD inevitably progresses or may regress can inform clinical decision-making and health policy. Objective To study CKD progression and regression by...

Rationale & Objective: Metabolic acidosis related to chronic kidney disease (CKD) is associated with an accelerated decline in glomerular filtration rate (GFR) and the development of end-stage kidney disease. Whether metabolic acidosis is associated with cardiovascular (CV) events in patients with CKD is unclear. Study Design: Retrospective cohort...

Background and Aims Elevated albuminuria in patients with chronic kidney disease (CKD) is associated with increased risks of CKD progression, cardiovascular events and all-cause death. In the DAPA-CKD study, dapagliflozin significantly reduced the risk of all-cause death in patients with elevated albuminuria compared with placebo (hazard ratio: 0.6...

Background and Aims Anaemia is a common complication in patients with chronic kidney disease (CKD) and is associated with increased mortality, cardiovascular complications, reduced quality of life and increased use of healthcare resources. Mathematical modelling based on robust epidemiological and clinical data is a useful approach for predicting t...

Background and Aims Anaemia is a common complication in patients with chronic kidney disease (CKD). Prevalence of anaemia increases with CKD severity and ranges from 17% in patients with stage 3 disease to over 50% in patients with stage 5 CKD who are not on dialysis. Anaemia of CKD is associated with increased mortality, cardiovascular complicatio...

Background and Aims With an estimated global prevalence of 10%, chronic kidney disease (CKD) and its associated complications place a substantial strain on healthcare systems worldwide, which is compounded by the burden of undiagnosed CKD. Early CKD diagnosis followed by guideline-recommended interventions can improve patient outcomes and reduce as...

Background and Aims Anaemia is common in patients with chronic kidney disease (CKD) and is associated with increased mortality, cardiovascular complications, reduced quality of life and increased use of healthcare resources. Based on robust epidemiological and clinical data, mathematical modelling is a useful approach for predicting the future burd...

Background and Aims Chronic kidney disease (CKD) is a debilitating and costly condition, with an estimated global prevalence of approximately 10%. Progression of CKD is associated with end-stage renal disease, cardiovascular events and premature mortality, as well as increased requirement for renal replacement therapies (RRTs), which are associated...

Background Comparisons between frailty assessment tools for waitlist candidates are a recognized priority area for kidney transplantation. We compared the prevalence of frailty using three established tools in a cohort of waitlist candidates. Methods Waitlist candidates were prospectively enrolled from 2016 to 2020 across five centers. Frailty was...

Background The risk of hyperkalemia is elevated in chronic kidney disease (CKD); however, the initial and recurrent risk among older individuals is less clear. Objectives We set out to examine the initial and 1-year recurrent risk of hyperkalemia by level of kidney function (estimated glomerular filtration rate, eGFR) in older adults (≥66 years ol...

Background: Management of chronic kidney disease (CKD) requires the management of risk factors, such as hypertension and albuminuria, that affect CKD progression. Identification of additional modifiable risk factors is necessary to develop new treatment strategies for CKD. We sought to quantify the association of metabolic acidosis with CKD progre...

Importance Kidney failure risk prediction has implications for disease management, including advance care planning in adults with severe (ie, estimated glomerular filtration rate [eGFR] category 4, [G4]) chronic kidney disease (G4-CKD). Existing prediction tools do not account for the competing risk of death. Objective To compare predictions of ki...

Rationale & Objective Digital health system tools to support chronic kidney disease (CKD) patients’ shared decision-making and preparation for kidney replacement treatments are needed. Study Design Descriptive study of the implementation of digital infrastructure to support a patient centered health system intervention. Setting & Participants Fou...