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Neighborhood Built Environment and Home Dialysis Utilization: Varying Patterns by Urbanicity-Dependent Patterns and Implications for Policy
Kim, Byoungjun; Li, Yiting; Lee, Myeonggyun; Bae, Sunjae; Blum, Matthew F; Le, Dustin; Coresh, Josef; Charytan, David M; Goldfarb, David S; Segev, Dorry L; Thorpe, Lorna E; Grams, Morgan E; McAdams-DeMarco, Mara A
RATIONALE & OBJECTIVE/OBJECTIVE:Despite national efforts, the uptake of home dialysis (peritoneal dialysis or home hemodialysis) remains low. Characteristics of the built environment may differentially impact home dialysis use. STUDY DESIGN/METHODS:Retrospective cohort study (2010-2019). SETTING & PARTICIPANTS/METHODS:1,103,695 adults (aged≥18 years) initiating dialysis in the US Renal Data System. EXPOSURE/METHODS:We examined 3 built environment domains based on residential ZIP code: (1) medically underserved areas (MUAs), defined as neighborhoods with limited primary care access; (2) distance to the nearest dialysis facility; and (3) distribution of housing characteristics (structure and overcrowding). OUTCOME/RESULTS:Uptake of home dialysis modalities at dialysis initiation. ANALYTICAL APPROACH/METHODS:We quantified associations between built environment characteristics and home dialysis initiation using multilevel logistic regression stratified by urbanicity type (urban, suburban, small-town, and rural). RESULTS:Among adults initiating dialysis, 40.8% lived in MUAs. Across ZIP codes, the mean percentage of overcrowded housing was 4.2% (SD, 4.7%), and the percentage of detached housing was 61.1% (SD, 21.1%); mean distance to the nearest dialysis facility was 5.5km (SD, 9.1km). Living in MUAs was associated with reduced home dialysis use only in urban (OR, 0.94; 95% CI, 0.91-0.96) and suburban (OR, 0.92; 95% CI, 0.89-0.94) areas. Similarly, housing overcrowding was associated with decreased home dialysis use only in urban (OR, 0.88; 95% CI, 0.86-0.89) and suburban (OR, 0.91; 95% CI, 0.90-0.93) areas. Longer distance to a dialysis facility was the most salient neighborhood factor associated with increased home dialysis use in small towns (OR, 1.14; 95% CI, 1.12-1.16) and rural areas (OR, 1.17; 95% CI, 1.15-1.19). LIMITATIONS/CONCLUSIONS:Housing characteristics were measured at the ZIP code level. CONCLUSIONS:Built environment characteristics associated with home dialysis uptake vary by urbanicity. Policies should address built environment barriers that are specific to urbanicity level. For example, increasing the frequency of dialysate delivery schedules could address housing space constraints in urban and suburban areas, and promoting home dialysis might be more effective for patients living far from dialysis centers in small-town and rural areas.
PMID: 40081754
ISSN: 1523-6838
CID: 5852612
Corrigendum to "Effects of dialysate potassium concentration of 3.0 mmol/l with sodium zirconium cyclosilicate on dialysis-free days versus dialysate potassium concentration of 2.0 mmol/l alone on rates of cardiac arrhythmias in hemodialysis patients with hyperkalemia." Kidney International 2025;107:169-179
Charytan, David M; Winkelmayer, Wolfgang C; Granger, Christopher B; Middleton, John P; Herzog, Charles A; Chertow, Glenn M; Eudicone, James M; Whitson, Jeremy D; Tumlin, James A; ,
PMID: 40404254
ISSN: 1523-1755
CID: 5853512
SGLT2 Inhibitors and Risk for Hyperkalemia Among Individuals Receiving RAAS Inhibitors
Wing, Sara; Ray, Joel G; Yau, Kevin; Jeyakumar, Nivethika; Abdullah, Sheikh; Luo, Bin; Cherney, David Z I; Harel, Ziv; Hundemer, Gregory L; Mavrakanas, Thomas A; Molnar, Amber O; Odutayo, Ayodele; Perl, Jeffrey; Young, Ann; Charytan, David; Weir, Matthew; Wald, Ron
IMPORTANCE/UNASSIGNED:Hyperkalemia is a common complication of taking a renin-angiotensin-aldosterone system inhibitor (RAASi). Post hoc analyses of large randomized clinical trials suggested that the addition of sodium-glucose cotransporter 2 inhibitors (SGLT2i) may attenuate this risk. It is unknown if this observation extends to daily clinical practice. OBJECTIVE/UNASSIGNED:To evaluate the association between SGLT2i initiation and hyperkalemia in individuals receiving RAASi with a background of diabetes, heart failure, or chronic kidney disease. DESIGN, SETTING, AND PARTICIPANTS/UNASSIGNED:This population-based retrospective cohort study was conducted in Ontario, Canada, from July 1, 2015, to June 30, 2021. The cohort comprised adults 66 years and older who were prescribed a RAASi and had a history of diabetes or heart failure, an estimated glomerular filtration rate of less than 45 mL/min/1.73 m2, and/or a urine albumin to creatinine ratio of greater than 30 mg/mmol. The data were analyzed between March 28, 2023, and March 22, 2024. EXPOSURE/UNASSIGNED:The study exposure was a new prescription of an SGLT2i compared to noninitiation of an SGLT2i. Inverse probability of treatment weighting by a propensity score for the receipt of SGLT2i was used to achieve balance of baseline covariates in both exposure groups. MAIN OUTCOMES AND MEASURES/UNASSIGNED:The primary study outcome was hyperkalemia, defined as a serum potassium of greater than 5.5 mEq/L or an administrative code for an inpatient or outpatient encounter with hyperkalemia within 1 year of the index date. RESULTS/UNASSIGNED:A total of 20 063 individuals who initiated an SGLT2i (mean [SD] age, 76.9 [6.6] years; 12 020 [59.9%] male) were compared to a pseudopopulation of 19 781 nonusers (mean [SD] age, 76.8 [7.0] years; 11 731 [59.3%] male). In the overall cohort, 95% had diabetes, 17% had heart failure, and 32% had stage 3 to 5 chronic kidney disease. SGLT2i initiation was associated with a lower risk of hyperkalemia (hazard ratio, 0.89 [95% CI, 0.82-0.96]). SGLT2i users had a significantly lower rate of RAASi discontinuation compared to nonusers (36% vs 45%; P < .001). CONCLUSIONS AND RELEVANCE/UNASSIGNED:This cohort study demonstrated that, among individuals with diabetes, heart failure, or chronic kidney disease who were receiving a RAASi, SGLT2i initiation was associated with a lower risk of hyperkalemia and RAASi discontinuation.
PMCID:12038716
PMID: 40293730
ISSN: 2168-6114
CID: 5833152
Cardiovascular, kidney and safety outcomes with canagliflozin in older adults: A combined analysis from the CANVAS Program and CREDENCE trial
Siriwardana, Amanda; Buizen, Luke; Jun, Min; Kotwal, Sradha; Arnott, Clare; Jardine, Meg J; Levin, Adeera; Heerspink, Hiddo J L; Charytan, David M; Pollock, Carol; Perkovic, Vlado; Neuen, Brendon L
AIM/OBJECTIVE:SGLT2 inhibitors may be underused in older adults with type 2 diabetes due to concerns about safety and tolerability. This pooled analysis of the CANVAS Program and CREDENCE trial examined the efficacy and safety of canagliflozin according to age. METHODS:Pooled individual participant data from the CANVAS Program (n = 10 142) and CREDENCE trial (n = 4401) were analysed by baseline age (<65 years, 65 to <75 years, and ≥75 years). A range of adjudicated clinical outcomes were assessed, including major adverse cardiovascular events and CKD progression, as well as safety outcomes. Cox proportional hazards models and Fine and Gray competing risk analysis were used. RESULTS:Among the 14 543 participants, 7927 (54.5%) were <65 years, 5281 (36.3%) were 65 to <75 years and 1335 (9.2%) were ≥75 years. Older participants had higher rates of atherosclerotic cardiovascular disease and heart failure, longer diabetes duration and lower mean eGFR. Reductions in cardiovascular and kidney outcomes with canagliflozin were consistent across age categories (all p trend >0.10), although there was some evidence that effects on cardiovascular death and all-cause death were attenuated with older age (p trend = 0.02 and 0.03, respectively). Although the incidence of adverse events increased with age, effects of canagliflozin on safety outcomes including acute kidney injury, volume depletion, urinary tract infections and hypoglycaemia, were not modified by age (all p trend >0.10). CONCLUSIONS:In patients with varying degrees of kidney function, canagliflozin reduced cardiovascular and kidney outcomes, regardless of age, with no additional safety concerns identified in older patients.
PMID: 39781601
ISSN: 1463-1326
CID: 5805172
A pilot randomized controlled study of integrated kidney palliative care and chronic kidney disease care implemented in a safety-net hospital: Protocol for a pilot study of feasibility of a randomized controlled trial
Scherer, Jennifer S; Wu, Wenbo; Lyu, Chen; Goldfeld, Keith S; Brody, Abraham A; Chodosh, Joshua; Charytan, David
BACKGROUND/UNASSIGNED:Chronic kidney disease (CKD) impacts more than 800 million people. It causes significant suffering and disproportionately impacts marginalized populations in the United States. Kidney palliative care has the potential to alleviate this distress, but has not been tested. This pilot study evaluates the feasibility of a randomized clinical trial (RCT) testing the efficacy of integrated kidney palliative and CKD care in an urban safety-net hospital. METHODS/UNASSIGNED:, and are receiving care at our safety net hospital. Participants will be randomized in permuted blocks of two or four to either the intervention group, who will receive monthly ambulatory care visits for six months with a palliative care provider trained in kidney palliative care, or to usual nephrology care. Primary outcomes are feasibility of recruitment, retention, fidelity to the study visit protocol, and the ability to collect outcome data. These outcomes include symptom burden, quality of life, and engagement in advance care planning. DISCUSSION/UNASSIGNED:This pilot RCT will provide essential data on the feasibility of testing integrated palliative care in CKD care in an underserved setting. These outcomes will inform a larger, fully powered trial that tests the efficacy of our kidney palliative care approach. CLINICAL TRIAL REGISTRATION/UNASSIGNED:NCT04998110.
PMCID:11851192
PMID: 40008278
ISSN: 2451-8654
CID: 5800892
Implementation of Ambulatory Kidney Supportive Care in a Safety Net Hospital
Scherer, Jennifer S; Gore, Radhika J; Georgia, Annette; Cohen, Susan E; Caplin, Nina; Zhadanova, Olga; Chodosh, Joshua; Charytan, David; Brody, Abraham A
CONTEXT/BACKGROUND:Chronic kidney disease (CKD) disproportionately impacts lower socioeconomic groups and is associated with many symptoms and complex decisions. Integration of Kidney Supportive Care (KSC) with CKD care can address these needs. To our knowledge, this approach has not been described in an underserved population. OBJECTIVES/OBJECTIVE:We describe our adaptation of an ambulatory integrated KSC and CKD clinic for implementation in a safety net hospital. We report our utilization metrics; characteristics of the population served; and visit activities. METHODS:We considered modifications from the perspectives of people with CKD, their providers, and the health system. Modifications were informed by meeting notes with key participants (hospital administrators [n = 5], funders [n = 1], and content experts [n = 2]), as well as literature on palliative care program building, safety net hospitals, and KSC. We extracted utilization data for the first 15 months of the clinic's operations, demographics, clinical characteristics, unmet health related social needs, and symptom burden, measured by the Integrated Palliative Outcome Scale-Renal (total Score, and sub-scores of physical, psychological, and practical impact of CKD) from the electronic health record. Results are reported using descriptive statistics. RESULTS:Adaptions were proactive and done by clinical and administrative leaders. Meetings identified challenges of the safety net setting including people presenting with advanced disease and having several social needs. Modifications to our base model were made in staffing, data collection, and work flow. Show rate was approximately 68%, with a majority of people identifying as Black or Hispanic, and uninsured or on Medicaid. Symptom burden was lower than previous reports, driven by a better psychological sub-score. CONCLUSIONS:We describe a feasible ambulatory care model of KSC in a safety net setting that can serve as a framework for the development of other noncancer palliative care ambulatory clinics. Future work will optimize our model.
PMID: 39788301
ISSN: 1873-6513
CID: 5781492
Moderate Kidney Dysfunction Independently Increases Sudden Cardiac Arrest Risk: A Community-Based Study
Truyen, Thien Tan Tri Tai; Uy-Evanado, Audrey; Chugh, Harpriya; Reinier, Kyndaron; Charytan, David M; Salvucci, Angelo; Jui, Jonathan; Chugh, Sumeet S
BACKGROUND/UNASSIGNED:Moderate kidney dysfunction is independently associated with increased cardiovascular mortality. Sudden cardiac arrest (SCA) accounts for at least 25% of chronic kidney disease (CKD) mortality. METHODS/UNASSIGNED:(2021 CKD-EPI formula). A population-based SCA study in Southern California was used for validation. RESULTS/UNASSIGNED:eGFR drop below 90 increased SCA risk (OR: 1.24, 95% CI: 1.18-1.31). Similar findings were observed in the validation cohort (817 SCA and 3,249 controls), where moderate CKD was associated with SCA (OR: 1.51, 95% CI: 1.16-1.97). CONCLUSION/UNASSIGNED:Moderate CKD is associated with an increased risk of SCA in the general population. Further research into the potential integration of moderate renal dysfunction into SCA risk stratification are warranted.
PMCID:11952626
PMID: 40162277
CID: 5818702
Pain Coping Skills Training for Patients Receiving Hemodialysis: The HOPE Consortium Randomized Clinical Trial
Dember, Laura M; Hsu, Jesse Y; Mehrotra, Rajnish; Cavanaugh, Kerri L; Kalim, Sahir; Charytan, David M; Fischer, Michael J; Jhamb, Manisha; Johansen, Kirsten L; Becker, William C; Pellegrino, Bethany; Eneanya, Nwamaka D; Schrauben, Sarah J; Pun, Patrick H; Unruh, Mark L; Morasco, Benjamin J; Mehta, Mansi; Miyawaki, Nobuyuki; Penfield, Jeffrey; Bernardo, Leah; Brintz, Carrie E; Cheatle, Martin D; Doorenbos, Ardith Z; Heapy, Alicia A; Keefe, Francis J; Krebs, Erin E; Kuzla, Natalie; Nigwekar, Sagar U; Schmidt, Rebecca J; Steel, Jennifer L; Wetmore, James B; White, David M; Kimmel, Paul L; Cukor, Daniel
IMPORTANCE/UNASSIGNED:Chronic pain is common among individuals with dialysis-dependent kidney failure. OBJECTIVE/UNASSIGNED:To evaluate the effectiveness of pain coping skills training (PCST), a cognitive behavioral intervention, on pain interference. DESIGN, SETTING, AND PARTICIPANTS/UNASSIGNED:This multicenter randomized clinical trial of PCST vs usual care was conducted across 16 academic centers and 103 outpatient dialysis facilities in the US. Adults undergoing maintenance hemodialysis and experiencing chronic pain were randomly assigned to PCST or usual care in a 1:1 ratio. Participants were followed in the trial for 36 weeks. Enrollment began on January 4, 2021, and follow-up ended on December 21, 2023. INTERVENTIONS/UNASSIGNED:PCST consisting of 12 weekly coach-led sessions via video or telephone conferencing, followed by 12 weeks of daily interactive voice response sessions. Usual care had no trial-driven pain intervention. MAIN OUTCOMES/UNASSIGNED:The primary outcome was pain interference measured with the Brief Pain Inventory (BPI) Interference subscale (score range of 0-10, with higher scores indicating more pain interference). Secondary outcomes included pain intensity, pain catastrophizing, quality of life, depression, and anxiety. RESULTS/UNASSIGNED:A total of 643 participants (mean [SD] age, 60.3 [12.6] years; 288 [44.8%] female) were randomized, with 319 assigned to PCST and 324 assigned to usual care. At week 12 (primary end point), the PCST group had a larger reduction in the BPI Interference score than the usual care group (between-group difference, -0.49; 95% CI, -0.85 to -0.12; P = .009). The effect persisted at week 24 (between-group difference in BPI Interference score, -0.48; 95% CI, -0.86 to -0.11) but was diminished at week 36 (between-group difference in BPI Interference score, -0.34; 95% CI, -0.72 to 0.04). A decrease in BPI Interference score greater than 1 point (minimal clinically important difference) occurred in 143 of 281 participants (50.9%) in the PCST group vs 108 of 295 participants (36.6%) in the usual care group at 12 weeks (odds ratio, 1.79; 95% CI, 1.28-2.49) and 142 of 258 participants (55.0%) in the PCST group vs 113 of 264 participants (42.8%) in the usual care group at 24 weeks (odds ratio, 1.59; 95% CI, 1.13-2.24). Favorable changes with PCST were also apparent for secondary outcomes of pain intensity, quality of life, depression, and anxiety at weeks 12 and/or 24, as well as for pain catastrophizing at weeks 24 and 36. CONCLUSIONS AND RELEVANCE/UNASSIGNED:In this randomized clinical trial of patients undergoing maintenance hemodialysis, PCST had benefits on pain interference and other pain-associated outcomes. While the effect on the overall cohort was of modest magnitude, the intervention resulted in a clinically meaningful improvement in pain interference for a substantial proportion of participants. TRIAL REGISTRATION/UNASSIGNED:ClinicalTrials.gov Identifier: NCT04571619.
PMID: 39786400
ISSN: 2168-6114
CID: 5781482
Effects of dialysate potassium concentration of 3.0 mmol/l with sodium zirconium cyclosilicate on dialysis-free days versus dialysate potassium concentration of 2.0 mmol/l alone on rates of cardiac arrhythmias in hemodialysis patients with hyperkalemia
Charytan, David M; Winkelmayer, Wolfgang C; Granger, Christopher B; Middleton, John P; Herzog, Charles A; Chertow, Glenn M; Eudicone, James M; Whitson, Jeremy D; Tumlin, James A; ,
The optimal approach towards managing serum potassium (sK+) and hemodialysate potassium concentrations is uncertain. To study this, adults receiving hemodialysis for three months or more with hyperkalemia (pre-dialysis sK+ 5.1-6.5 mmol/l) had cardiac monitors implanted and were randomized to either eight weeks of 2.0 mmol/l potassium/1.25 mmol/l calcium dialysate without sodium zirconium cyclosilicate (SZC) (2.0 potassium/noSZC) or 3.0 mmol/l potassium/1.25 mmol/l calcium dialysate combined with SZC (3.0 potassium/SZC) on non-dialysis days to maintain pre-dialysis sK+ 4.0-5.5 mmol/l, followed by treatment crossover for another eight weeks. The primary outcome was the rate of adjudicated atrial fibrillation (AF) episodes of at least 2 minutes duration. Secondary outcomes included clinically significant arrhythmias (bradycardia, ventricular tachycardia, and/or asystole) and the proportion of sK+ measurements within an optimal window of 4.0-5.5 mmol/l. Among 88 participants (mean age: 57.1 years; 51% male; mean pre-dialysis sK+: 5.5 mmol/l) with 25.5 person-years of follow-up, 296 AF episodes were detected in nine patients. The unadjusted AF rate was lower with 3.0 potassium/SZC versus 2.0 potassium/noSZC; 9.7 vs. 13.4/person-year (modeled rate ratio 0.52; 95% confidence interval 0.41-0.65). Clinically significant arrhythmias were reduced with 3.0 potassium/SZC vs. 2.0 potassium/noSZC (6.8 vs. 10.2/person-year modeled rate ratio 0.47; 0.38; 0.58). Fewer sK+ measurements outside the optimal window occurred with 3.0 potassium/SZC (modeled odds ratio: 0.27; 0.12-0.35). Hypokalemia was less frequent (33 vs. 58 patients) with 3.0 potassium/SZC compared with 2.0 potassium/noSZC. Thus, in patients with hyperkalemia on maintenance hemodialysis, a combination of hemodialysate potassium 3.0 mmol/l and SZC on non-hemodialysis days reduced the rates of AF, other clinically significant arrhythmias, and post-dialysis hypokalemia compared with hemodialysate potassium 2.0/noSZC.
PMID: 39490411
ISSN: 1523-1755
CID: 5779522
Gender Differences in Citation Rate: An Analysis of Randomized Controlled Trials in Nephrology High-Impact Journals Over Two Decades
Soomro, Qandeel H; Li, Shuojohn; McCarthy, Angela; Varela, Dalila; Ways, Javaughn; Charytan, Amalya M; Keane, Colin; Ramos, Giana; Nicholson, Joey; Charytan, David M
PMID: 39115814
ISSN: 1555-905x
CID: 5696882