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Caldwell JS, Parvathinathan G, Stedman MR, Ahearn P, Tan JC, Cheng XS. Immunologic Benefits of 0-antigen Mismatched Transplants: No Added Boost for Racial and Ethnic Minorities. Transplant Direct 2024; 10:e1653. [PMID: 38881747 PMCID: PMC11177818 DOI: 10.1097/txd.0000000000001653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 03/21/2024] [Indexed: 06/18/2024] Open
Abstract
Background Systemic barriers to posttransplant care, including access to immunosuppressant medications, contribute to higher rates of kidney transplant failure in racial minorities. Matching donor and recipient HLA alleles reduce allorecognition, easing reliance on immunosuppression. We hypothesize that 0-antigen mismatch transplants may provide stronger protection against graft loss in racial minorities. Methods We compared adult, single-organ, deceased-donor kidney transplants in the United States from 2007 to 2016 by degree of HLA mismatch (0- versus ≥1-antigen mismatch). We examined time-to-allograft failure, with death as a competing event, using multivariable Weibull models, stratified by recipient race (White versus non-White), and evaluated the interaction between mismatch and recipient race. We used Kaplan-Meier imputation to account for competing risk of death. Results We analyzed 102 114 transplants (median follow-up, 5.6 y; 16 862 graft losses, 18 994 deaths). Zero-antigen mismatch was associated with improved allograft survival (adjusted subdistribution hazard ratio [sHR] 0.80; 95% confidence interval [CI], 0.75-0.85). When stratified by recipient race, the effect of 0-antigen mismatch was more pronounced in White (unadjusted sHR 0.78; 95% CI, 0.72-0.83) versus non-White recipients (sHR 0.88; 95% CI, 0.79-0.99; interaction P = 0.04). The differential effect was attenuated after adjusting for covariates (sHR 0.78; 95% CI, 0.73-0.84 versus sHR 0.87; 95% CI, 0.77-0.98; interaction P = 0.10). Conclusions Zero-antigen mismatch transplants conferred a 20% risk reduction in allograft loss, which was similar between non-White and White recipients. This may reflect an increased degree of mismatch at other HLA alleles and non-HLA alleles in non-White recipients or because of the extent of systemic barriers to healthcare borne by minority recipients.
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Affiliation(s)
| | | | | | - Patrick Ahearn
- Division of Nephrology, Stanford University, Palo Alto, CA
| | - Jane C. Tan
- Division of Nephrology, Stanford University, Palo Alto, CA
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2
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Lui E, Gill J, Hamid M, Wen C, Singh N, Okoh P, Xu X, Boakye P, James CE, Waterman AD, Edwards B, Mucsi I. Racialized and Immigrant Status and the Pursuit of Living Donor Kidney Transplant - a Canadian Cohort Study. Kidney Int Rep 2024; 9:960-972. [PMID: 38765593 PMCID: PMC11101831 DOI: 10.1016/j.ekir.2024.01.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 01/12/2024] [Accepted: 01/22/2024] [Indexed: 05/22/2024] Open
Abstract
Introduction Both immigrant and racialized status may be associated with the pursuit of living donor kidney transplant (LDKT). Methods This study was a secondary analysis of a convenience cross-sectional sample of patients with kidney failure in Toronto, obtained from our "Comprehensive Psychosocial Research Data System" research database. The exposures included racialized, immigrant, and combined immigrant and racialized status (White nonimmigrant, racialized nonimmigrant, White immigrant and racialized immigrant). Outcomes include the following: (i) having spoken about LDKT with others, (ii) having a potential living donor (LD) identified, (iii) having allowed others to share the need for LDKT, (iv) having directly asked a potential donor to be tested, and (v) accept a hypothetical LDKT offer. We assessed the association between exposure and outcomes using univariable, and multivariable binary or multinominal logistic regression (reference: White or White nonimmigrant participants). Results Of the 498 participants, 281 (56%) were immigrants; 142 (28%) were African, Caribbean, and Black (ACB); 123 (25%) were Asian; and 233 (47%) were White. Compared to White nonimmigrants, racialized immigrants (relative risk ratio [RRR]: 2.98; 95% confidence interval [CI]: 1.76-5.03) and racialized nonimmigrants (RRR: 2.84; 95% CI: 1.22-6.65) were more likely not to have spoken about LDKT with others (vs. having spoken or planning to do so). Both racialized immigrant (odds ratio [OR]: 4.07; 95% CI: 2.50-6.34), racialized nonimmigrants (OR: 2.68; 95% CI: 1.31-5.51) and White immigrants (OR: 2.68; 95% CI: 1.43-5.05) were more likely not to have a potential LD identified. Conclusion Both racialized and immigrant status are associated with less readiness to pursue LDKT. Supporting patients to communicate their need for LDKT may improve equitable access to LDKT.
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Affiliation(s)
- Eric Lui
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Jasleen Gill
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Marzan Hamid
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
- Stanford University School of Medicine, Stanford, California, USA
| | - Cindy Wen
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Navneet Singh
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Princess Okoh
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Xihui Xu
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Priscilla Boakye
- Daphne Cockwell School of Nursing, Toronto Metropolitan University, Toronto, Ontario, Canada
| | - Carl E. James
- Faculty of Education, York University, Toronto, Ontario, Canada
| | - Amy D. Waterman
- Department of Surgery and J.C. Walter Jr. Transplant Center, Houston Methodist Hospital, Houston, Texas, USA
| | - Beth Edwards
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Istvan Mucsi
- Ajmera Transplant Center and Division of Nephrology Department, University Health Network, University of Toronto, Toronto, Ontario, Canada
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Edwards B, Marshall LJ, Ahmadzadeh G, Ahmed R, Angarso L, Balaji S, Okoh P, Rogers E, Neves P, Boakye P, Gill J, James CE, Mucsi I. Exploring barriers to living donor kidney transplant for African, Caribbean and Black communities in the Greater Toronto Area, Ontario: a qualitative study protocol. BMJ Open 2023; 13:e073176. [PMID: 37586868 PMCID: PMC10432620 DOI: 10.1136/bmjopen-2023-073176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 07/27/2023] [Indexed: 08/18/2023] Open
Abstract
INTRODUCTION Living donor (LD) kidney transplant (KT) is the best treatment option for many patients with kidney failure as it improves quality of life and survival compared with dialysis and deceased donor KT. Unfortunately, LDKT is underused, especially among groups marginalised by race and ethnicity. African, Caribbean and Black (ACB) patients are 60%-70% less likely to receive LDKT in Canada compared with white patients. Research from the USA and the UK suggests that mistrust, cultural and generational norms, access, and affordability may contribute to inequities. To date, no Canadian studies have explored the beliefs and behaviours related to LDKT in ACB communities. Research approaches that use a critical, community-based approach can help illuminate broader structural factors that may shape individual beliefs and behaviours. In this qualitative study, we will investigate barriers to accessing LDKT in ACB communities in the Greater Toronto Area, to enhance our understanding of the perspectives and experiences of ACB community members, both with and without lived experience of chronic kidney disease (CKD). METHODS AND ANALYSIS Hospital-based and community-based recruitment strategies will be used to recruit participants for focus groups and individual interviews. Participants will include self-identified ACB individuals with and without experiences of CKD and nephrology professionals. Collaboration with ACB community partners will facilitate a community-based research approach. Data will be analysed using reflexive thematic analysis and critical race theory. Findings will be revised based on feedback from ACB community partners. ETHICS AND DISSEMINATION This study has been approved by the University Health Network Research Ethics Board UHN REB file #15-9775. Study findings will contribute to the codevelopment of culturally safe and responsive educational materials to raise awareness about CKD and its treatments and to improve equitable access to high-quality kidney care, including LDKT, for ACB patients.
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Affiliation(s)
- Beth Edwards
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | | | - Ghazaleh Ahmadzadeh
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Ranie Ahmed
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Lydia Angarso
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Shilpa Balaji
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Princess Okoh
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Emma Rogers
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | - Paula Neves
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
| | | | - Jagbir Gill
- University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Istvan Mucsi
- Ajmera Transplant Centre, University Health Network, Toronto, Ontario, Canada
- Medicine (Nephrology), University of Toronto, Toronto, Ontario, Canada
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Schaapherder AF, Kaisar M, Mumford L, Robb M, Johnson R, de Kok MJ, Bemelman FJ, van de Wetering J, van Zuilen AD, Christiaans MH, Baas MC, Nurmohamed AS, Berger SP, Bastiaannet E, de Vries AP, Sharples E, Ploeg RJ, Lindeman JH. Donor characteristics and their impact on kidney transplantation outcomes: Results from two nationwide instrumental variable analyses based on outcomes of donor kidney pairs accepted for transplantation. EClinicalMedicine 2022; 50:101516. [PMID: 35784435 PMCID: PMC9240982 DOI: 10.1016/j.eclinm.2022.101516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 05/22/2022] [Accepted: 05/27/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Donor-characteristics and donor characteristics-based decision algorithms are being progressively used in the decision process whether or not to accept an available donor kidney graft for transplantation. While this may improve outcomes, the performance characteristics of the algorithms remains moderate. To estimate the impact of donor factors of grafts accepted for transplantation on transplant outcomes, and to test whether implementation of donor-characteristics-based algorithms in clinical decision-making is justified, we applied an instrumental variable analysis to outcomes for kidney donor pairs transplanted in different individuals. METHODS This analysis used (dis)congruent outcomes of kidney donor pairs as an instrument and was based on national transplantation registry data for all donor kidney pairs transplanted in separate individuals in the Netherlands (1990-2018, 2,845 donor pairs), and the United Kingdom (UK, 2000-2018, 11,450 pairs). Incident early graft loss (EGL) was used as the primary discriminatory factor. It was reasoned that a scenario with a dominant impact of donor variables on transplantation outcomes would result in high concordance of EGL in both recipients, whilst dominance of asymmetrical outcomes could indicate a more complex scenario, involving an interaction of donor, procedural and recipient factors. FINDINGS Incidences of congruent EGL (Netherlands: 1·2%, UK: 0·7%) were slightly lower than the arithmetical (stochastic) incidences, suggesting that once a graft has been accepted for transplantation, donor factors minimally contribute to incident EGL. A long-term impact of donor factors was explored by comparing outcomes for functional grafts from donor pairs with asymmetrical vs. symmetrical outcomes. Recipient survival was similar for both groups, but a slightly compromised graft survival was observed for grafts with asymmetrical outcomes in the UK cohort: (10-years Hazard Ratio for graft loss: 1·18 [1·03-1·35] p<0·018); and 5 years eGFR (48·6 [48·3-49·0] vs. 46·0 [44·5-47·6] ml/min in the symmetrical outcome group, p<0·001). INTERPRETATION Our results suggest that donor factors for kidney grafts deemed acceptable for transplantation impact minimally on transplantation outcomes. A strong reliance on donor factors and/or donor-characteristics-based decision algorithms could result in unjustified rejection of grafts. Future efforts to optimize transplant outcomes should focus on a better understanding of the recipient factors underlying transplant outcomes. FUNDING None.
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Affiliation(s)
- Alexander F. Schaapherder
- Department of Surgery and Leiden Transplant Center, Leiden University Medical Center, Leiden, the Netherlands
| | - Maria Kaisar
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
- Research and Development, NHS Blood and Transplant, Bristol & Oxford, United Kingdom
| | - Lisa Mumford
- Statistics and Clinical Studies, NHS Blood and Transplant, Bristol, United Kingdom
| | - Matthew Robb
- Statistics and Clinical Studies, NHS Blood and Transplant, Bristol, United Kingdom
| | - Rachel Johnson
- Statistics and Clinical Studies, NHS Blood and Transplant, Bristol, United Kingdom
| | - Michèle J.C. de Kok
- Department of Surgery and Leiden Transplant Center, Leiden University Medical Center, Leiden, the Netherlands
| | - Frederike J. Bemelman
- Department of Internal Medicine (Nephrology), Amsterdam UMC, Academic Medical Center, Amsterdam, the Netherlands
| | - Jacqueline van de Wetering
- Department of Internal Medicine (Nephrology), Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Arjan D. van Zuilen
- Department of Internal Medicine (Nephrology), University Medical Center Utrecht, Utrecht, the Netherlands
| | - Maarten H.L. Christiaans
- Department of Internal Medicine (Nephrology), Maastricht University Medical Center, Maastricht, the Netherlands
| | - Marije C. Baas
- Department of Internal Medicine (Nephrology), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Azam S. Nurmohamed
- Department of Internal Medicine (Nephrology), Amsterdam UMC, VU Medical Center, Amsterdam, the Netherlands
| | - Stefan P. Berger
- Department of Internal Medicine (Nephrology), University Medical Center Groningen, Groningen, the Netherlands
| | - Esther Bastiaannet
- Department of Surgery, Leiden University Medical Center, Leiden, The Netherlands. Current address: Dept. Epidemiology, UZH, Zurich, Switzerland
| | - Aiko P.J. de Vries
- Division of Nephrology, Department of Internal Medicine and Leiden Transplant Center, Leiden University Medical Center, Leiden, the Netherlands
| | - Edward Sharples
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Rutger J. Ploeg
- Department of Surgery and Leiden Transplant Center, Leiden University Medical Center, Leiden, the Netherlands
- Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom
| | - Jan H.N. Lindeman
- Department of Surgery and Leiden Transplant Center, Leiden University Medical Center, Leiden, the Netherlands
- Corresponding author at: Department of Surgery, Leiden University Medical Center, PObox 9600, 2300 RC Leiden, the Netherlands.
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5
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Helling TS. Addressing Socioeconomic Inequities in Kidney Transplantation for Black Recipients. JAMA Surg 2022; 157:e221295. [PMID: 35507382 DOI: 10.1001/jamasurg.2022.1295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Thomas S Helling
- Department of Surgery, University of Mississippi Medical Center, Jackson
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6
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Evans RD, Lan JH, Kadatz M, Brar S, Chang DT, McMichael L, Gill J, Gill JS. Use and Outcomes of Induction Therapy in Well-Matched Kidney Transplant Recipients. Clin J Am Soc Nephrol 2022; 17:271-279. [PMID: 35131930 PMCID: PMC8823946 DOI: 10.2215/cjn.09170721] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 11/30/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND AND OBJECTIVES The optimal induction treatment in low-immune risk kidney transplant recipients is uncertain. We therefore investigated the use and outcomes of induction immunosuppression in a low-risk cohort of patients who were well matched with their donor at HLA-A, -B, -DR, -DQB1 on the basis of serologic typing. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS Our study was an observational study of first adult kidney-only transplant recipients in the United States recorded by the Organ Procurement and Transplant Network. RESULTS Among 2976 recipients, 57% were treated with T cell-depleting antibodies, 28% were treated with an IL-2 receptor antagonist, and 15% were treated without induction. There was no difference in allograft survival, death-censored graft survival, or death with function between patients treated with an IL-2 receptor antagonist and no induction therapy. In multivariable models, patients treated with T cell-depleting therapy had a similar risk of graft loss from any cause, including death (hazard ratio, 1.19; 95% confidence interval, 0.98 to 1.45), compared with patients treated with an IL-2 receptor antagonist or no induction. The findings were consistent in subgroup analyses of Black recipients, patients grouped by calculated panel reactive antibody, and donor source. The incidence of acute rejection at 1 year was low (≤5%) and did not vary between treatment groups. CONCLUSIONS Use of induction therapy with T cell-depleting therapy or IL-2 receptor antagonists in first kidney transplant recipients who are well matched with their donor at the HLA-A, -B, -DR, -DQB1 gene loci is not associated with improved post-transplant outcomes.
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Affiliation(s)
- Rhys D.R. Evans
- Division of Nephrology, Kidney Transplant Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - James H. Lan
- Division of Nephrology, Kidney Transplant Program, University of British Columbia, Vancouver, British Columbia, Canada,Vancouver Coastal Health Research Institute, Vancouver, British Columbia, Canada,Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Matthew Kadatz
- Division of Nephrology, Kidney Transplant Program, University of British Columbia, Vancouver, British Columbia, Canada,Vancouver Coastal Health Research Institute, Vancouver, British Columbia, Canada
| | - Sandeep Brar
- Division of Nephrology, Kidney Transplant Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Doris T. Chang
- Providence Health Research Institute, Vancouver, British Columbia, Canada
| | - Lachlan McMichael
- Division of Nephrology, Kidney Transplant Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Jagbir Gill
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada,Providence Health Research Institute, Vancouver, British Columbia, Canada,Centre for Health Evaluation and Outcomes Sciences, Vancouver, British Columbia, Canada,University of British Columbia School of Population and Public Health, Vancouver, British Columbia, Canada
| | - John S. Gill
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada,Providence Health Research Institute, Vancouver, British Columbia, Canada,Department of Nephrology, Tufts–New England Medical Center, Boston, Massachusetts
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7
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Significance of Ethnic Factors in Immunosuppressive Therapy Management After Organ Transplantation. Ther Drug Monit 2021; 42:369-380. [PMID: 32091469 DOI: 10.1097/ftd.0000000000000748] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Clinical outcomes after organ transplantation have greatly improved in the past 2 decades with the discovery and development of immunosuppressive drugs such as calcineurin inhibitors, antiproliferative agents, and mammalian target of rapamycin inhibitors. However, individualized dosage regimens have not yet been fully established for these drugs except for therapeutic drug monitoring-based dosage modification because of extensive interindividual variations in immunosuppressive drug pharmacokinetics. The variations in immunosuppressive drug pharmacokinetics are attributed to interindividual variations in the functional activity of cytochrome P450 enzymes, UDP-glucuronosyltransferases, and ATP-binding cassette subfamily B member 1 (known as P-glycoprotein or multidrug resistance 1) in the liver and small intestine. Some genetic variations have been found to be involved to at least some degree in pharmacokinetic variations in post-transplant immunosuppressive therapy. It is well known that the frequencies and effect size of minor alleles vary greatly between different races. Thus, ethnic considerations might provide useful information for optimizing individualized immunosuppressive therapy after organ transplantation. Here, we review ethnic factors affecting the pharmacokinetics of immunosuppressive drugs requiring therapeutic drug monitoring, including tacrolimus, cyclosporine, mycophenolate mofetil, sirolimus, and everolimus.
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8
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El-Dassouki N, Wong D, Toews DM, Gill J, Edwards B, Orchanian-Cheff A, Neves P, Marshall LJ, Mucsi I. Barriers to Accessing Kidney Transplantation Among Populations Marginalized by Race and Ethnicity in Canada: A Scoping Review Part 2-East Asian, South Asian, and African, Caribbean, and Black Canadians. Can J Kidney Health Dis 2021; 8:2054358121996834. [PMID: 33738106 PMCID: PMC7934034 DOI: 10.1177/2054358121996834] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 01/17/2021] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Kidney transplantation (KT), a treatment option for end-stage kidney disease (ESKD), is associated with longer survival and improved quality of life compared with dialysis. Inequities in access to KT, and specifically, living donor kidney transplantation (LDKT), have been documented in Canada, along various demographic dimensions. In this article, we review existing evidence about inequitable access to KT and LDKT for patients from communities marginalized by race and ethnicity in Canada. OBJECTIVE To characterize the currently published data on rates of KT and LDKT among East Asian, South Asian, and African, Caribbean, and Black (ACB) Canadian communities and to answer the research question, "what factors may influence inequitable access to KT among East Asian, South Asian, and ACB Canadian communities?." ELIGIBILITY CRITERIA Databases and gray literature were searched in June and November 2020 for full-text original research articles or gray literature resources addressing KT access or barriers in East Asian, South Asian, and ACB Canadian communities. A total of 25 articles were analyzed thematically. SOURCES OF EVIDENCE Gray literature and CINAHL, OVID Medline, OVID Embase, and Cochrane databases. CHARTING METHODS Literature characteristics were recorded and findings which described rates of and factors that influence access to KT were summarized in a narrative account. Key themes were subsequently identified and synthesized thematically in the review. RESULTS East Asian, South Asian, and ACB communities in Canada face barriers in accessing culturally appropriate medical knowledge and care and experience inequitable access to KT. Potential barriers include gaps in knowledge about ESKD and KT, religious and spiritual concerns, stigma of ESKD and KT, health beliefs, social determinants of health, and experiences of systemic racism in health care. LIMITATIONS This review included literature that used various methodologies and did not assess study quality. Data on ethnicity and race were not reported or defined in a standardized manner. The communities examined in this review are not homogeneous and views on organ donation and KT vary by individual. CONCLUSIONS Our review has identified potential barriers for communities marginalized by race and ethnicity in accessing KT and LDKT. Further research is urgently needed to better understand the barriers and support needs of these communities, and to develop strategies to improve equitable access to LDKT for the growingly diverse population in Canada.
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Affiliation(s)
- Noor El-Dassouki
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Dorothy Wong
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Deanna M. Toews
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Jagbir Gill
- The University of British Columbia, Vancouver, Canada
| | - Beth Edwards
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Ani Orchanian-Cheff
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Paula Neves
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Lydia-Joi Marshall
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | - Istvan Mucsi
- Ajmera Transplant Centre, Toronto General Hospital, University Health Network, Toronto, ON, Canada
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9
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Krishnamoorthy G, Arsene C, Jena N, Mogulla SM, Coakley R, Khine J, Khosrodad N, Klein A, Sule AA. Racial disparities in COVID-19 hospitalizations do not lead to disparities in outcomes. Public Health 2021; 190:93-98. [PMID: 33385640 PMCID: PMC7698674 DOI: 10.1016/j.puhe.2020.11.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/09/2020] [Accepted: 11/22/2020] [Indexed: 02/08/2023]
Abstract
OBJECTIVES The objective of the study is the identification of racial differences in characteristics and comorbidities in patients hospitalized for COVID-19 and the impact on outcomes. STUDY DESIGN The study design is a retrospective observational study. METHODS Data for all patients admitted to seven community hospitals in Michigan, United States, with polymerase chain reaction confirmed diagnosis of COVID-19 from March 10 to April 15, 2020 were analyzed. The primary outcomes of racial disparity in inpatient mortality and intubation were analyzed using descriptive statistics and multivariate regression models. RESULTS The study included 336 Black and 408 White patients. Black patients were younger (62.9 ± 15.0 years vs 71.8 ± 16.4, P < .001), had a higher mean body mass index (32.4 ± 8.6 kg/m2 vs 28.8 ± 7.5, P < .001), had higher prevalence of diabetes (136/336 vs 130/408, P = .02), and presented later (6.6 ± 5.3 days after symptom onset vs. 5.4 ± 5.4, P = .006) compared with White patients. Younger Black patients had a higher prevalence of obesity (age <65 years, 69.9%) than older Black patients (age >65 years, 39.2%) and younger White patients (age < 65, 55.1%). Intubation did not reach statistical significance for racial difference (Black patients 61/335 vs. 54/406, P = .08). Mortality was not higher in Black patients (65/335 vs. 142/406 in White patients, odds ratio 0.61, 95% confidence interval: 0.37 to 0.99, 2-sided P = .05) in multivariate analysis, accounting for other risk factors associated with mortality. CONCLUSIONS Higher prevalence of obesity and diabetes in young Black populations may be the critical factor driving disproportionate COVID-19 hospitalizations in Black populations. Hospitalized Black patients do not have worse outcomes compared with White patients.
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Affiliation(s)
| | - C Arsene
- ProMedica Health System, Toledo, OH, United States
| | - N Jena
- St Joseph Mercy Oakland Hospital, Pontiac, MI, United States
| | - S M Mogulla
- St Joseph Mercy Oakland Hospital, Pontiac, MI, United States
| | - R Coakley
- Ross University School of Medicine, United States
| | - J Khine
- St Joseph Mercy Oakland Hospital, Pontiac, MI, United States
| | - N Khosrodad
- St Joseph Mercy Oakland Hospital, Pontiac, MI, United States
| | - A Klein
- Ross University School of Medicine, United States
| | - A A Sule
- St Joseph Mercy Oakland Hospital, Pontiac, MI, United States.
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10
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Allograft and Patient Outcomes Between Indigenous and Nonindigenous Kidney Transplant Recipients. Transplantation 2020; 104:847-855. [PMID: 32224814 DOI: 10.1097/tp.0000000000002891] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Kidney transplant outcomes of indigenous Australians are poorer compared with nonindigenous Australians, but it is unknown whether the type of acute rejection differs between these patient groups or whether rejection mediates the effect between ethnicity, death-censored graft failure (DCGF), and death with a functioning graft (DWFG). METHODS Biopsy-proven acute rejection (BPAR) rates and types were compared between indigenous and nonindigenous recipients. The associations between ethnicity, BPAR, DCGF, and DWFG were examined using adjusted competing risk analyses, and mediation analysis was conducted to determine whether BPAR mediated the adverse effects between ethnicity and outcomes. RESULTS Fifty-seven (9.3%) of 616 patients who have received kidney-only transplants between 2000 and 2010 in Western Australia were indigenous. Compared with nonindigenous recipients, BPAR rates were higher in indigenous recipients (42 versus 74 episodes/100 recipients, P < 0.01), with an excess of antibody-mediated rejections. During a median follow-up of 8 years, indigenous recipients were more likely to experience BPAR, DCGF, and DWFG compared with nonindigenous recipients, with adjusted subdistribution hazard ratio of 1.94 (1.39-2.70), 1.53 (0.85-2.76; P = 0.159), and 2.14 (1.13-4.06; P = 0.020), respectively. Although 70% of the effect between ethnicity and DCGF was mediated by BPAR, no similar association was found for DWFG. CONCLUSIONS Indigenous recipients experienced poorer allograft and patient outcomes compared with nonindigenous recipients, with BPAR an important determinant for DCGF. Future research identifying other risk factors and mediators associated with patient survival in indigenous recipients should be considered a priority.
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11
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Kim SJ, Gill JS, Knoll G, Campbell P, Cantarovich M, Cole E, Kiberd B. Referral for Kidney Transplantation in Canadian Provinces. J Am Soc Nephrol 2019; 30:1708-1721. [PMID: 31387925 DOI: 10.1681/asn.2019020127] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 05/20/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Patient referral to a transplant facility, a prerequisite for dialysis-treated patients to access kidney transplantation in Canada, is a subjective process that is not recorded in national dialysis or transplant registries. Patients who may benefit from transplant may not be referred. METHODS In this observational study, we prospectively identified referrals for kidney transplant in adult patients between June 2010 and May 2013 in 12 transplant centers, and linked these data to information on incident dialysis patients in a national registry. RESULTS Among 13,184 patients initiating chronic dialysis, the cumulative incidence of referral for transplant was 17.3%, 24.0%, and 26.8% at 1, 2, and 3 years after dialysis initiation, respectively; the rate of transplant referral was 15.8 per 100 patient-years (95% confidence interval, 15.1 to 16.4). Transplant referral varied more than three-fold between provinces, but it was not associated with the rate of deceased organ donation or median waiting time for transplant in individual provinces. In a multivariable model, factors associated with a lower likelihood of referral included older patient age, female sex, diabetes-related ESKD, higher comorbid disease burden, longer durations (>12.0 months) of predialysis care, and receiving dialysis at a location >100 km from a transplant center. Median household income and non-Caucasian race were not associated with a lower likelihood of referral. CONCLUSIONS Referral rates for transplantation varied widely between Canadian provinces but were not lower among patients of non-Caucasian race or with lower socioeconomic status. Standardization of transplantation referral practices and ongoing national reporting of referral may decrease disparities in patient access to kidney transplant.
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Affiliation(s)
- S Joseph Kim
- University Health Network, University of Toronto, Toronto, Canada
| | - John S Gill
- University of British Columbia, Vancouver, Canada; .,Division of Nephrology, Center for Health Evaluation and Outcome Sciences, Vancouver, Canada
| | - Greg Knoll
- University of Ottawa, Ottawa, Canada.,Department of Medicine, Ottawa Hospital Research Institute, Ottawa, Canada
| | | | | | - Edward Cole
- University Health Network, University of Toronto, Toronto, Canada
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12
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Waheed A, Djurdjev O, Dong J, Gill J, Barbour S. Validation of Self-Reported Race in a Canadian Provincial Renal Administrative Database. Can J Kidney Health Dis 2019; 6:2054358119859528. [PMID: 31308951 PMCID: PMC6604118 DOI: 10.1177/2054358119859528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Accepted: 05/20/2019] [Indexed: 11/18/2022] Open
Abstract
Background: Administrative data are commonly used to study clinical outcomes in renal
disease. Race is an important determinant of renal health delivery and
outcomes in Canada but is not validated in most administrative data, and the
correlation with census-based definitions of race is unknown. Objectives: Validation of self-reported race (SRR) in a Canadian provincial renal
administrative database (Patient Records and Outcome Management Information
System [PROMIS]) and comparison with the Canadian census categories of
race. Design: Prospective patient survey study to validate SRR in PROMIS. Setting: British Columbia, Canada. Patients: Adult patients registered in PROMIS. Measurements: Survey SRR was used as gold standard to validate SRR in PROMIS. Self-reported
race in PROMIS was compared with census race categories. Methods: This is a cross-sectional telephone survey of a random sample of all adults
in PROMIS conducted between February 2016 and November 2016. Responders
selected a race category from PROMIS and from the Canadian census.
Sensitivity (Sn) and specificity (Sp) were calculated with 95% confidence
intervals (CIs). Results: A total of 21 039 patients met inclusion criteria, 1677 were selected for the
survey and 637 participated (38% response rate). There were no differences
between the PROMIS, sampled, and responder populations. PROMIS SRR had an
accuracy of 95.3% (95% CI: 94.2%-97.0%) when validated against the survey
SRR with Sn and Sp ≥90% in all race groups except in Aboriginals (Sn 87.5%).
The positive and negative predictive values were ≥95%, except in very low
and high–prevalence groups, respectively. The Canadian census had an
accuracy of 95.7% (95% CI: 94.4%-97.6%) when validated against PROMIS SRR
with Sn and Sp ≥90%. The results did not differ in subgroups based on age,
sex, birth outside Canada, or renal group (glomerulonephritis, chronic
kidney disease, hemodialysis, peritoneal dialysis, transplant recipients, or
live donors). Limitations: Analysis of minority groups and lower prevalence groups is limited by sample
size. Results may not be generalizable to other administrative
databases. Conclusions: We have shown high accuracy of PROMIS SRR that validates its use in the
secondary analysis of administrative data for research. There is high
correlation between PROMIS and census race categories which allows linkage
with other data sources that use census-based definitions of race.
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Affiliation(s)
- Aiza Waheed
- The University of British Columbia, Vancouver, Canada
| | | | | | - Jagbir Gill
- The University of British Columbia, Vancouver, Canada.,BC Provincial Renal Agency, Vancouver, Canada
| | - Sean Barbour
- The University of British Columbia, Vancouver, Canada.,BC Provincial Renal Agency, Vancouver, Canada
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13
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Williams A, Richardson C, McCready J, Anderson B, Khalil K, Tahir S, Nath J, Sharif A. Black Ethnicity is Not a Risk Factor for Mortality or Graft Loss After Kidney Transplant in the United Kingdom. EXP CLIN TRANSPLANT 2018; 16:682-689. [PMID: 30295582 DOI: 10.6002/ect.2018.0241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES There are conflicting reports in the literature regarding outcomes after kidney transplant for patients of black ethnicity. To investigate further, we compared outcomes for black versus white kidney transplant recipients in a single UK transplant center. MATERIALS AND METHODS We analyzed 1066 kidney transplant recipients (80 black patients, 986 white patients) within a single-center cohort (2007-2017) in the United Kingdom, with cumulative 4446 patient-year follow-up. Data were electronically extracted from the Department of Health Informatics database for every study recruit, with manual data linkage to the UK Transplant Registry (for graft survival, delayed graft function, and rejection data) and Office for National Statistics (for mortality data). Primary outcomes of interest were graft/patient survival. RESULTS Black recipients have increased baseline risk profiles with longer wait times, difficulty in matching, worse HLA matching, more socioeconomic deprivation, and lower rates of living kidney donors. Postoperatively, black versus white recipients had increased risk for delayed graft function (34.3% vs 10.2%; P < .001), increased 1-year rejection (16.7% vs 7.3%; P = .012), higher 1-year creatinine levels (166 vs 138 mmol/L; P = .003), and longer posttransplant length of stay (14.5 vs 9.5 days; P = .020). Although black recipients did not have increased risk of death versus white recipients (10.0% vs 11.0%, respectively; P = .486), they did have increased risk for death-censored graft loss (23.8% vs 11.1%; P = .002). However, in an adjusted Cox regression model, black ethnicity was not associated with increased risk for death-censored graft loss (hazard ratio of 1.209, 95% confidence interval, 0.660-2.216; P = .539). CONCLUSIONS Black kidney transplant recipients in the United Kingdom have increased risk of adverse graft-related outcomes due to high-risk baseline variables rather than their black ethnicity per se.
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Affiliation(s)
- Aimee Williams
- From the Department of Nephrology and Transplantation, Queen Elizabeth Hospital, Edgbaston, Birmingham, United Kingdom
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14
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Cole AJ, Johnson RW, Egede LE, Baliga PK, Taber DJ. Improving Medication Safety and Cardiovascular Risk Factor Control to Mitigate Disparities in African-American Kidney Transplant Recipients: Design and Methods. Contemp Clin Trials Commun 2018. [PMID: 29532038 PMCID: PMC5844505 DOI: 10.1016/j.conctc.2017.11.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
There is a lack of data analyzing the influence of cardiovascular disease (CVD) risk factor control on graft survival disparities in African-American kidney transplant recipients. Studies in the general population indicate that CVD risk factor control is poor in African-Americans, leading to higher rates of renal failure and major acute cardiovascular events. However, with the exception of hypertension, there is no data demonstrating similar results within transplant recipients. Recent analyses conducted by our investigator group indicate that CVD risk factors, especially diabetes, are poorly controlled in African-American recipients, which likely impacts graft loss. This study protocol describes a prospective interventional clinical trial with the goal of demonstrating improved medication safety and CVD risk factor control in adult solitary kidney transplant recipients at least one-year post-transplant with a functioning graft. This is a prospective, interventional, 6-month, pharmacist-led and technology enabled study in adult kidney transplant recipients with the goal of improving CVD risk factor outcomes by improving medication safety and patient self-efficacy. This papers describes the issues related to racial disparities in transplant, the details of this intervention and how we expect this intervention to improve CVD risk factor control in kidney transplant recipients, particularly within African-Americans.
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Affiliation(s)
- Andrew J Cole
- College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Reginald W Johnson
- College of Medicine, Medical University of South Carolina, Charleston, SC
| | - Leonard E Egede
- Division of General Internal Medicine, Medical College of Wisconsin, Milwaukee, WI
| | - Prabhakar K Baliga
- Department of Surgery, College of Medicine, Medical University of South Carolina, Charleston, SC
| | - David J Taber
- Division of Transplant Surgery, College of Medicine, Medical University of South Carolina, Charleston, SC.,Department of Pharmacy Services, Ralph H Johnson VAMC, Charleston, SC
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15
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Florman S, Vincenti F, Durrbach A, Abouljoud M, Bresnahan B, Garcia VD, Mulloy L, Rice K, Rostaing L, Zayas C, Calderon K, Meier-Kriesche U, Polinsky M, Yang L, Medina Pestana J, Larsen CP. Outcomes at 7 years post-transplant in black vs nonblack kidney transplant recipients administered belatacept or cyclosporine in BENEFIT and BENEFIT-EXT. Clin Transplant 2018; 32:e13225. [PMID: 29461660 DOI: 10.1111/ctr.13225] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2018] [Indexed: 11/28/2022]
Abstract
Clinical outcomes are generally worse for black vs nonblack renal allograft recipients. In BENEFIT and BENEFIT-EXT, recipients were randomized to belatacept more intense-based, belatacept less intense-based, or cyclosporine-based immunosuppression. At year 7, belatacept was associated with superior graft survival vs cyclosporine in BENEFIT (recipients of living or standard criteria deceased donor kidneys); belatacept was associated with similar graft survival vs cyclosporine in BENEFIT-EXT (recipients of extended criteria donor kidneys). In both studies, renal function was superior for belatacept-treated vs cyclosporine-treated patients. Seven-year outcomes were examined by race post hoc in each study. The effect of race and treatment on time to death or graft loss was compared using Cox regression. The interaction between treatment and race was also considered. Glomerular filtration rate (GFR) was estimated from months 1 to 84 using a repeated-measures model. In total, 8.3% (55/666) and 13.1% (71/543) of patients in BENEFIT and BENEFIT-EXT, respectively, were black. Time to death or graft loss was similar in blacks and nonblacks. For both subgroups, estimated mean GFR increased over 7 years for belatacept, but declined for cyclosporine. Outcomes were similar in belatacept-treated black and nonblack patients. Due to the small number of black patients, these results must be interpreted with caution.
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Affiliation(s)
- Sander Florman
- Recanati/Miller Transplant Institute, Mount Sinai Medical Center, New York, NY, USA
| | - Flavio Vincenti
- Departments of Medicine and Surgery, University of California, San Francisco, CA, USA
| | - Antoine Durrbach
- Department of Nephrology, University Hôpital of Bicêtre, Le Kremlin-Bicêtre, France
| | | | - Barbara Bresnahan
- Department of Nephrology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Valter Duro Garcia
- Renal and Pancreas Transplant Department, Hospital Dom Vicente Scherer, Porto Alegre, Brazil
| | - Laura Mulloy
- Department of Medicine, Georgia Regents University, Augusta, GA, USA
| | - Kim Rice
- Baylor University Medical Center, Dallas, TX, USA
| | - Lionel Rostaing
- Department of Nephrology and Organ Transplantation, University Hospital and INSERM U563, IFR-BMT, Toulouse, France
| | - Carlos Zayas
- Department of Surgery, Piedmont Hospital, Atlanta, GA, USA
| | | | | | | | | | | | - Christian P Larsen
- Department of Surgery, Emory University Transplant Center, Atlanta, GA, USA
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16
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Duff CE, Simmonds MJ. Genetic predictors of long-term graft function in kidney and pancreas transplant patients. Brief Funct Genomics 2017; 16:228-237. [PMID: 28110269 DOI: 10.1093/bfgp/elw039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Kidney and pancreas transplantation have helped transform the lives of people with end-stage renal failure and individuals with type 1 diabetes who have poor glycaemic control/severe secondary complications, respectively. Despite an improvement in immunosuppressive regimes, operative techniques and decreased initial rejection rates, there has been little improvement in long-term graft survival rates over the past decade. Whilst limited progress has been made in establishing clinical markers of graft function, several genetic markers of long-term graft function have been identified. These genetic markers have the potential to (i) assist in selecting marginal donor organs for transplantation, (ii) provide better understanding of the mechanisms behind graft loss enabling identification of new, or repurposing, current treatments to extend graft function and (iii) provide a window of opportunity to identify and treat individuals before graft failure has occurred. This review will discuss the different genetic variants screened for a role in predicting transplant longevity, examine their findings and limitations and introduce where the future of genetic research within the transplantation field lies.
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17
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Taber DJ, Hamedi M, Rodrigue JR, Gebregziabher MG, Srinivas TR, Baliga PK, Egede LE. Quantifying the Race Stratified Impact of Socioeconomics on Graft Outcomes in Kidney Transplant Recipients. Transplantation 2017; 100:1550-7. [PMID: 26425875 DOI: 10.1097/tp.0000000000000931] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Socioeconomic status (SES) is a significant determinant of health outcomes and may be an important component of the causal chain surrounding racial disparities in kidney transplantation. The social adaptability index (SAI) is a validated and quantifiable measure of SES, with a lack of studies analyzing this measure longitudinally or between races. METHODS Longitudinal cohort study in adult kidney transplantation transplanted at a single-center between 2005 and 2012. The SAI score includes 5 domains (employment, education, marital status, substance abuse and income), each with a minimum of 0 and maximum of 3 for an aggregate of 0 to 15 (higher score → better SES). RESULTS One thousand one hundred seventy-one patients were included; 624 (53%) were African American (AA) and 547 were non-AA. African Americans had significantly lower mean baseline SAI scores (AAs 6.5 vs non-AAs 7.8; P < 0.001). Cox regression analysis demonstrated that there was no association between baseline SAI and acute rejection in non-AAs (hazard ratio [HR], 0.92; 95% confidence interval [95% CI], 0.81-1.05), whereas it was a significant predictor of acute rejection in AAs (HR, 0.89; 95% CI, 0.80-0.99). Similarly, a 2-stage approach to joint modelling of time to graft loss and longitudinal SAI did not predict graft loss in non-AAs (HR, 1.01; 95% CI, 0.28-3.62), whereas it was a significant predictor of graft loss in AAs (HR, 0.23; 95% CI, 0.06-0.93). CONCLUSIONS After controlling for confounders, SAI scores were associated with a lower risk of acute rejection and graft loss in AA kidney transplant recipients, whereas neither baseline nor follow-up SAI predicted outcomes in non-AA kidney transplant recipients.
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Affiliation(s)
- David J Taber
- 1 Division of Transplant Surgery, College of Medicine, Medical University of South Carolina, Charleston, SC. 2 Department of Pharmacy, Ralph H Johnson VAMC, Charleston, SC. 3 College of Medicine, Medical University of South Carolina, Charleston, SC. 4 Transplant Institute, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA. 5 Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, SC. 6 Division of Transplant Nephrology, College of Medicine, Medical University of South Carolina, Charleston, SC. 7 Veterans Affairs HSR&D Health Equity and Rural Outreach Innovation Center (HEROIC), Ralph H Johnson VAMC, Charleston, SC
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18
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Overall Graft Loss Versus Death-Censored Graft Loss: Unmasking the Magnitude of Racial Disparities in Outcomes Among US Kidney Transplant Recipients. Transplantation 2017; 101:402-410. [PMID: 26901080 DOI: 10.1097/tp.0000000000001119] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND Black kidney transplant recipients experience disproportionately high rates of graft loss. This disparity has persisted for 40 years, and improvements may be impeded based on the current public reporting of overall graft loss by US regulatory organizations for transplantation. METHODS Longitudinal cohort study of kidney transplant recipients using a data set created by linking Veterans Affairs and US Renal Data System information, including 4918 veterans transplanted between January 2001 and December 2007, with follow-up through December 2010. Multivariable analysis was conducted using 2-stage joint modeling of random and fixed effects of longitudinal data (linear mixed model) with time to event outcomes (Cox regression). RESULTS Three thousand three hundred six non-Hispanic whites (67%) were compared with 1612 non-Hispanic black (33%) recipients with 6.0 ± 2.2 years of follow-up. In the unadjusted analysis, black recipients were significantly more likely to have overall graft loss (hazard ratio [HR], 1.19; 95% confidence interval [95% CI], 1.07-1.33), death-censored graft loss (HR, 1.67; 95% CI, 1.45-1.92), and lower mortality (HR, 0.83; 95% CI, 0.72-0.96). In fully adjusted models, only death-censored graft loss remained significant (HR, 1.38; 95% CI, 1.12-1.71; overall graft loss [HR, 1.08; 95% CI, 0.91-1.28]; mortality [HR, 0.84; 95% CI, 0.67-1.06]). A composite definition of graft loss reduced the magnitude of disparities in blacks by 22%. CONCLUSIONS Non-Hispanic black kidney transplant recipients experience a substantial disparity in graft loss, but not mortality. This study of US data provides evidence to suggest that researchers should focus on using death-censored graft loss as the primary outcome of interest to facilitate a better understanding of racial disparities in kidney transplantation.
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19
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Tahir S, Gillott H, Jackson-Spence F, Nath J, Mytton J, Evison F, Sharif A. Do outcomes after kidney transplantation differ for black patients in England versus New York State? A comparative, population-cohort analysis. BMJ Open 2017; 7:e014069. [PMID: 28487457 PMCID: PMC5623361 DOI: 10.1136/bmjopen-2016-014069] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 02/14/2017] [Accepted: 03/22/2017] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Inferior outcomes for black kidney transplant recipients in the USA may not be generalisable elsewhere. In this population cohort analysis, we compared outcomes for black kidney transplant patients in England versus New York State. DESIGN Retrospective, comparative, population cohort study utilising administrative data registries. SETTINGS AND PARTICIPANTS English data were derived from Hospital Episode Statistics, while New York State data were derived from Statewide Planning and Research Cooperative System. All adults receiving their first kidney-alone allograft between 2003 and 2013 were eligible for inclusion. MEASURES The primary outcome measure was mortality post kidney transplantation (including inhospital death, 30-day mortality and 1-year mortality). Secondary outcome measures included postoperative admission length of stay, risk of rehospitalisation, development of cardiac events, stroke, cancer or fracture and finally transplant rejection/failure. Cox proportional hazards regression was used to investigate relationship between ethnicity, country and outcome. RESULTS Black patients comprised 6.5% of the English cohort (n=1215/18 493) and 23.0% of the New York State cohort (n=2660/11 602). Compared with New York State, black kidney transplant recipients in England were more likely younger, male, living-donor kidney recipients and had dissimilar medical comorbidities. Inpatient mortality was not statistically different, but death within 30 days, 1 year or kidney transplant rejection/failure was lower among black patients in England versus black patients in New York State. In adjusted regression analysis, with black ethnicity the reference group, white patients had reduced risk for 30-day mortality (OR 0.62 (95% CI 0.44 to 0.86)) and 1-year mortality (OR 0.79 (95% CI 0.63 to 0.99)) in New York State but no difference was observed in England. Compared with England, black kidney transplant patients in New York State had increased HR for kidney transplant rejection rejection/failure by median follow-up (HR 2.15, 95% CI 1.91 to 2.43). CONCLUSIONS Outcomes after kidney transplantation for black patients may not be translatable between countries.
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Affiliation(s)
- Sanna Tahir
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Holly Gillott
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | | | - Jay Nath
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Jemma Mytton
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Felicity Evison
- Department of Informatics, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Adnan Sharif
- College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
- Department of Nephrology and Transplantation, Queen Elizabeth Hospital, Birmingham, UK
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20
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Taber DJ, Gebregziabher M, Hunt KJ, Srinivas T, Chavin KD, Baliga PK, Egede LE. Twenty years of evolving trends in racial disparities for adult kidney transplant recipients. Kidney Int 2016; 90:878-87. [PMID: 27555121 PMCID: PMC5026578 DOI: 10.1016/j.kint.2016.06.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 06/01/2016] [Accepted: 06/02/2016] [Indexed: 02/04/2023]
Abstract
Disparities in outcomes for African American (AA) kidney transplant recipients have persisted for 40 years without a comprehensive analysis of evolving trends in the risks associated with this disparity. Here we analyzed U.S. transplant registry data, which included adult Caucasian or AA solitary kidney recipients undergoing transplantation between 1990 and 2009 comprising 202,085 transplantations. During this 20-year period, the estimated rate of 5-year graft loss decreased from 27.6% to 12.8%. Notable trends in baseline characteristics that significantly differed by race over time included the following: increased prevalence of diabetes from 2001 to 2009 in AAs (5-year slope difference: 3.4%), longer time on the waiting list (76.5 more days per 5 years in AAs), fewer living donors in AAs from 2003 to 2009 (5-year slope difference: -3.36%), more circulatory death donors in AAs from 2000-09 (5-year slope difference: 1.78%), and a slower decline in delayed graft function in AAs (5-year slope difference: 0.85%). The absolute risk difference between AAs and Caucasians for 5-year graft loss significantly declined over time (-0.92% decrease per 5 years), whereas the relative risk difference actually significantly increased (3.4% increase per 5 years). These results provide a mixed picture of both promising and concerning trends in disparities for AA kidney transplant recipients. Thus, although the disparity for graft loss has significantly improved, equity is still far off, and other disparities, including living donation rates and delayed graft function rates, have widened during this time.
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Affiliation(s)
- David J Taber
- Division of Transplant Surgery, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA; Department of Pharmacy Services, Ralph H. Johnson VAMC, Charleston, South Carolina, USA.
| | - Mulugeta Gebregziabher
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Kelly J Hunt
- Department of Public Health Sciences, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Titte Srinivas
- Division of Transplant Nephrology, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Kenneth D Chavin
- Division of Transplant Surgery, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Prabhakar K Baliga
- Division of Transplant Surgery, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Leonard E Egede
- Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (HEROIC), Ralph H. Johnson VAMC, Charleston, South Carolina, USA
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21
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Taber DJ, Hunt KJ, Fominaya CE, Payne EH, Gebregziabher M, Srinivas TR, Baliga PK, Egede LE. Impact of Cardiovascular Risk Factors on Graft Outcome Disparities in Black Kidney Transplant Recipients. Hypertension 2016; 68:715-25. [PMID: 27402921 DOI: 10.1161/hypertensionaha.116.07775] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 06/05/2016] [Indexed: 12/25/2022]
Abstract
Although outcome inequalities for non-Hispanic black (NHB) kidney transplant recipients are well documented, there is paucity in data assessing the impact of cardiovascular disease (CVD) risk factors on this disparity in kidney transplantation. This was a longitudinal study of a national cohort of veteran kidney recipients transplanted between January 2001 and December 2007. Data included baseline characteristics acquired through the United States Renal Data System linked to detailed clinical follow-up information acquired through the Veterans Affairs electronic health records. Analyses were conducted using sequential multivariable modeling (Cox regression), incorporating blocks of variables into iterative nested models; 3139 patients were included (2095 non-Hispanic whites [66.7%] and 1044 NHBs [33.3%]). NHBs had a higher prevalence of hypertension (100% versus 99%; P<0.01) and post-transplant diabetes mellitus (59% versus 53%; P<0.01) with reduced control of hypertension (blood pressure <140/90 60% versus 69%; P<0.01), diabetes mellitus (A1c <7%, 35% versus 47%; P<0.01), and low-density lipoprotein (<100 mg/dL, 55% versus 61%; P<0.01). Adherence to medications used to manage CVD risk was significantly lower in NHBs. In the fully adjusted models, the independent risk of graft loss in NHBs was substantially reduced (unadjusted hazard ratio, 2.00 versus adjusted hazard ratio, 1.49). CVD risk factors and control reduced the influence of NHB race by 9% to 18%. Similar trends were noted for mortality, and estimates were robust across in sensitivity analyses. These results demonstrate that NHB kidney transplant recipients have significantly higher rates of CVD risk factors and reduced CVD risk control. These issues are likely partly related to medication nonadherence and meaningfully contribute to racial disparities for graft outcomes.
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Affiliation(s)
- David J Taber
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC.
| | - Kelly J Hunt
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC
| | - Cory E Fominaya
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC
| | - Elizabeth H Payne
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC
| | - Mulugeta Gebregziabher
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC
| | - Titte R Srinivas
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC
| | - Prabhakar K Baliga
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC
| | - Leonard E Egede
- From the Division of Transplant Surgery (D.J.T., P.K.B.), Department of Public Health Sciences (K.J.H., E.H.P., M.G.), and Division of Transplant Nephrology (T.R.S.), College of Medicine, Medical University of South Carolina, Charleston, SC; and Department of Pharmacy Services (D.J.T., C.E.F.) and Veteran Affairs HSR&D Health Equity and Rural Outreach Innovation Center (L.E.E.), Ralph H Johnson VAMC, Charleston, SC
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Tjaden LA, Noordzij M, van Stralen KJ, Kuehni CE, Raes A, Cornelissen EA, O’Brien C, Papachristou F, Schaefer F, Groothoff JW, Jager KJ. Racial Disparities in Access to and Outcomes of Kidney Transplantation in Children, Adolescents, and Young Adults: Results From the ESPN/ERA-EDTA (European Society of Pediatric Nephrology/European Renal Association−European Dialysis and Transplant Association) Registry. Am J Kidney Dis 2016; 67:293-301. [DOI: 10.1053/j.ajkd.2015.09.023] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 09/19/2015] [Indexed: 11/11/2022]
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Ward FL, O'Kelly P, Donohue F, ÓhAiseadha C, Haase T, Pratschke J, deFreitas DG, Johnson H, Conlon PJ, O'Seaghdha CM. Influence of socioeconomic status on allograft and patient survival following kidney transplantation. Nephrology (Carlton) 2015; 20:426-33. [DOI: 10.1111/nep.12410] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Frank L Ward
- Department of Transplantation and Renal Medicine; Beaumont Hospital; Dublin Ireland
| | - Patrick O'Kelly
- Department of Transplantation and Renal Medicine; Beaumont Hospital; Dublin Ireland
| | - Fionnuala Donohue
- Health Intelligence Unit; Health & Wellbeing Directorate; Health Service Executive; Dublin Ireland
| | - Coilin ÓhAiseadha
- Health Intelligence Unit; Health & Wellbeing Directorate; Health Service Executive; Dublin Ireland
| | - Trutz Haase
- Social and Economic Consultant; Health Service Executive; Dublin Ireland
| | - Jonathan Pratschke
- Social and Economic Consultant; Health Service Executive; Dublin Ireland
| | - Declan G deFreitas
- Department of Transplantation and Renal Medicine; Beaumont Hospital; Dublin Ireland
| | - Howard Johnson
- Health Intelligence Unit; Health & Wellbeing Directorate; Health Service Executive; Dublin Ireland
| | - Peter J Conlon
- Department of Transplantation and Renal Medicine; Beaumont Hospital; Dublin Ireland
| | - Conall M O'Seaghdha
- Department of Transplantation and Renal Medicine; Beaumont Hospital; Dublin Ireland
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Lee SL, Hashimoto H, Kohro T, Horiguchi H, Koide D, Komuro I, Fushimi K, Yamazaki T, Yasunaga H. Influence of municipality-level mean income on access to aortic valve surgery: a cross-sectional observational study under Japan's universal health-care coverage. PLoS One 2014; 9:e111071. [PMID: 25360759 PMCID: PMC4215927 DOI: 10.1371/journal.pone.0111071] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 09/18/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Universal health-care coverage has attracted the interest of policy makers as a way of achieving health equity. However, previous reports have shown that despite universal coverage, socioeconomic disparity persists in access to high-tech invasive care, such as cardiac treatment. In this study, we aimed to investigate the association between socioeconomic status and care of aortic stenosis in the context of Japan's health-care system, which is mainly publicly funded. METHODS We chose aortic stenosis in older people as a target because such patients are likely to be affected by socioeconomic disparity. Using a large Japanese claim-based inpatient database, we identified 12,893 isolated aortic stenosis patients aged over 65 years who were hospitalized between July 2010 and March 2012. Municipality socioeconomic status was represented by the mean household income of the patients' residential municipality, categorized into quartiles. The likelihood of undergoing aortic valve surgery and in-hospital mortality was regressed against socioeconomic status level with adjustments for hospital volume, regional number of cardiac surgeons per 1 million population, and patients' clinical status. RESULTS We found no significant differences between the highest and lowest quartile groups in surgical indication (odds ratio, 0.84; 95% confidence interval, 0.69-1.03) or in-hospital mortality (1.00; 0.68-1.48). Hospital volume was significantly associated with lower postoperative mortality (odds ratio of the highest volume tertile to the lowest, 0.49; 0.34-0.71). CONCLUSIONS Under Japan's current universal health-care coverage, municipality socioeconomic status did not appear to have a systematic relationship with either treatment decision for surgical intervention or postoperative survival following aortic valve surgery among older patients. Our results imply that universal health-care coverage with high publicly funded coverage offers equal access to high-tech cardiovascular care.
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Affiliation(s)
- Seitetsu L. Lee
- Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
| | - Hideki Hashimoto
- Department of Health and Social Behavior, The University of Tokyo, Tokyo, Japan
| | - Takahide Kohro
- Department of Clinical Informatics, Jichi Medical University, Tochigi, Japan
| | - Hiromasa Horiguchi
- Department of Clinical Data Management and Research, Clinical Research Center, National Hospital Organization Headquarters, Tokyo, Japan
| | - Daisuke Koide
- Department of Clinical Epidemiology and Systems, The University of Tokyo, Tokyo, Japan
| | - Issei Komuro
- Department of Cardiovascular Medicine, The University of Tokyo, Tokyo, Japan
| | - Kiyohide Fushimi
- Department of Health Policy and Informatics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tsutomu Yamazaki
- Clinical Research Support Center, The University of Tokyo, Tokyo, Japan
| | - Hideo Yasunaga
- Department of Clinical Epidemiology and Health Economics, The University of Tokyo, Tokyo, Japan
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Reames BN, Birkmeyer NJO, Dimick JB, Ghaferi AA. Socioeconomic disparities in mortality after cancer surgery: failure to rescue. JAMA Surg 2014; 149:475-81. [PMID: 24623106 DOI: 10.1001/jamasurg.2013.5076] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Disparities in operative mortality due to socioeconomic status (SES) have been consistently demonstrated, but the mechanisms underlying this disparity are not well understood. OBJECTIVE To determine whether variations in failure to rescue (FTR) contribute to socioeconomic disparities in mortality after major cancer surgery. DESIGN, SETTING, AND PARTICIPANTS We performed a retrospective cohort study using the Medicare Provider Analysis and Review File and the Medicare Denominator File. A summary measure of SES was created for each zip code using 2000 US Census data linked to residence. Multivariable logistic regression was used to examine the influence of SES on rates of FTR, and fixed-effects hierarchical regression was used to evaluate the extent to which disparities could be attributed to differences among hospitals. A total of 596,222 patients undergoing esophagectomy, pancreatectomy, partial or total gastrectomy, colectomy, lung resection, and cystectomy for cancer from 2003 through 2007 were studied. MAIN OUTCOMES AND MEASURES Operative mortality, postoperative complications, and FTR (case fatality after ≥1 major complication). RESULTS Patients in the lowest quintile of SES had mildly increased rates of complications (25.6% in the lowest quintile vs 23.8% in the highest quintile, P = .003), a larger increase in mortality (10.2% vs 7.7%, P = .0009), and the greatest increase in rates of FTR (26.7% vs 23.2%, P = .007). Analysis of hospitals revealed a higher FTR rate for all patients (regardless of SES) at centers treating the largest proportion of patients with low SES. The adjusted odds ratios (95% CIs) of FTR according to SES ranged from 1.04 (0.95-1.14) for gastrectomy to 1.45 (1.21-1.73) for pancreatectomy. Additional adjustment for hospital effect nearly eliminated the disparity observed in FTR across levels of SES. CONCLUSIONS AND RELEVANCE Patients in the lowest quintile of SES have significantly increased rates of FTR. This finding appears to be in part a function of the hospital where patients with low SES are treated. Future efforts to improve socioeconomic disparities should concentrate on hospital processes and characteristics that contribute to successful rescue.
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Affiliation(s)
- Bradley N Reames
- Center for Healthcare Outcomes & Policy, University of Michigan, Ann Arbor
| | | | - Justin B Dimick
- Center for Healthcare Outcomes & Policy, University of Michigan, Ann Arbor
| | - Amir A Ghaferi
- Center for Healthcare Outcomes & Policy, University of Michigan, Ann Arbor
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Tennankore KK, Kim SJ, Baer HJ, Chan CT. Survival and hospitalization for intensive home hemodialysis compared with kidney transplantation. J Am Soc Nephrol 2014; 25:2113-20. [PMID: 24854268 PMCID: PMC4147990 DOI: 10.1681/asn.2013111180] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 01/10/2014] [Indexed: 12/25/2022] Open
Abstract
Canadian patients receiving intensive home hemodialysis (IHHD; ≥16 hours per week) have survival comparable to that of deceased donor kidney transplant recipients in the United States, but a comparison with Canadian kidney transplant recipients has not been conducted. We conducted a retrospective cohort study of consecutive, adult IHHD patients and kidney transplant recipients between 2000 and 2011 at a large Canadian tertiary care center. The primary outcome was time-to-treatment failure or death for IHHD patients compared with expanded criteria, standard criteria, and living donor recipients, and secondary outcomes included hospitalization rate. Treatment failure was defined as a permanent switch to an alternative dialysis modality for IHHD patients, and graft failure for transplant recipients. The cohort comprised 173 IHHD patients and 202 expanded criteria, 642 standard criteria, and 673 living donor recipients. There were 285 events in the primary analysis. Transplant recipients had a reduced risk of treatment failure/death compared with IHHD patients, with relative hazards of 0.45 (95% confidence interval [95% CI], 0.31 to 0.67) for living donor recipients, 0.39 (95% CI, 0.26 to 0.59) for standard criteria donor recipients, and 0.42 (95% CI, 0.26 to 0.67) for expanded criteria donor recipients. IHHD patients had a lower hospitalization rate in the first year of treatment compared with standard criteria donor recipients and in the first 3 months of treatment compared with living donor and expanded criteria donor recipients. In this cohort, kidney transplantation was associated with superior treatment and patient survival, but higher early rates of hospitalization, compared with IHHD.
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Affiliation(s)
| | - S Joseph Kim
- Division of Nephrology, University Health Network, University of Toronto, Toronto, Ontario, Canada; Division of Nephrology, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Heather J Baer
- Division of General Medicine and Primary Care, Brigham and Women's Hospital, Boston, Massachusetts; Harvard Medical School, Boston, Massachusetts; and Department of Epidemiology, Harvard School of Public Health, Boston Massachusetts
| | - Christopher T Chan
- Division of Nephrology, University Health Network, University of Toronto, Toronto, Ontario, Canada
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Taber DJ, Douglass K, Srinivas T, McGillicuddy JW, Bratton CF, Chavin KD, Baliga PK, Egede LE. Significant racial differences in the key factors associated with early graft loss in kidney transplant recipients. Am J Nephrol 2014; 40:19-28. [PMID: 24969370 DOI: 10.1159/000363393] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 05/02/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND There is continued and significant debate regarding the salient etiologies associated with graft loss and racial disparities in kidney transplant recipients. METHODS This was a longitudinal cohort study of all adult kidney transplant recipients, comparing patients with early graft loss (<5 years) to those with graft longevity (surviving graft with at least 5 years of follow-up) across racial cohorts [African-American (AA) and non-AA] to discern risk factors. RESULTS 524 patients were included, 55% AA, 151 with early graft loss (29%) and 373 with graft longevity (71%). Consistent within both races, early graft loss was significantly associated with disability income [adjusted odds ratio (AOR) 2.2, 95% CI 1.1-4.5], Kidney Donor Risk Index (AOR 3.2, 1.4-7.5), rehospitalization (AOR 2.1, 1.0-4.4) and acute rejection (AOR 4.4, 1.7-11.6). Unique risk factors in AAs included Medicare-only insurance (AOR 8.0, 2.3-28) and BK infection (AOR 5.6, 1.3-25). Unique protective factors in AAs included cardiovascular risk factor control: AAs with a mean systolic blood pressure <150 mm Hg had 80% lower risk of early graft loss (AOR 0.2, 0.1-0.7), while low-density lipoprotein <100 mg/dl (AOR 0.4, 0.2-0.8), triglycerides <150 mg/dl (AOR 0.4, 0.2-1.0) and hemoglobin A1C <7% (AOR 0.2, 0.1-0.6) were also protective against early graft loss in AA, but not in non-AA recipients. CONCLUSIONS AA recipients have a number of unique risk factors for early graft loss, suggesting that controlling cardiovascular comorbidities may be an important mechanism to reduce racial disparities in kidney transplantation.
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Affiliation(s)
- David J Taber
- Division of Transplant Surgery, Medical University of South Carolina, Charleston, S.C., USA
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Outcomes in ethnic minority renal transplant recipients receiving everolimus versus mycophenolate: comparative risk assessment results from a pooled analysis. Transplantation 2014; 96:1073-81. [PMID: 24345868 PMCID: PMC3888463 DOI: 10.1097/tp.0b013e3182a486f5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Background Everolimus (EVR) has demonstrated good efficacy after renal transplantation. Racial disparities in clinical outcomes after de novo renal transplantation are well documented; whether the efficacy of EVR varies based on recipient ethnicity is unknown. We conducted a comparative risk assessment of EVR by ethnicity. Methods Data on 2004 renal transplant recipients from three EVR studies were pooled to identify the impact of ethnicity on efficacy outcomes across EVR dosing groups and control groups. Ethnic groups compared were African Americans, non-U.S. blacks, Asians, Hispanics, and Caucasians. EVR groups received either 1.5 or 3 mg per day, with either standard-dose cyclosporine or reduced-dose cyclosporine. Control groups received mycophenolic acid (MPA) with standard-dose cyclosporine. Composite efficacy failure endpoint was graft loss, death, biopsy-proven acute rejection, or lost to follow-up. Adjusted odds ratios were calculated using a logistic regression model. Results The proportion of renal transplant recipients who met the composite endpoint was African Americans (46%), non-U.S. black (35%), Caucasian (31%), Hispanic (28%), and Asian (25%). The odds of meeting the composite endpoint were significantly (P=0.0001) greater for African Americans versus Caucasians but did not differ among the other ethnic groups (ethnic groups were only compared with Caucasians). EVR and MPA were associated with similar efficacy among each of the ethnic groups. Conclusion In this pooled data analysis in more than 2000 renal transplant recipients, EVR versus MPA resulted in similar composite endpoint incidence events across ethnicities. Consistent with previously published data, African Americans had poorer clinical outcomes. EVR is efficacious regardless of ethnicity.
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Kidney graft survival in Europe and the United States: strikingly different long-term outcomes. Transplantation 2013; 95:267-74. [PMID: 23060279 DOI: 10.1097/tp.0b013e3182708ea8] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND Kidney graft survival has never been systematically compared between Europe and the United States. METHODS Applying period analysis to first deceased-donor (DD) and living-donor kidney grafts from the United Network for Organ Sharing/Organ Procurement and Transplantation Network for the United States and the Collaborative Transplant Study for Europe, we compared overall and age-specific 1-, 5-, and 10-year graft survival for Europeans and white, African, and Hispanic Americans for the 2005 to 2008 period. A Cox regression model was used to adjust for differences in patient characteristics. RESULTS For the 2005 to 2008 period, 1-year survival for DD grafts was equal (91%) between Europeans and white and Hispanic Americans, whereas it was slightly lower for African Americans (89%). In contrast, overall 5- and 10-year graft survival rates were considerably higher for Europe (77 and 56%, respectively) than for any of the three U.S. populations (whites, 71 and 46%, Hispanic, 73 and 48%, and African American, 62 and 34%). Differences were largest for recipient ages 0 to 17 and 18 to 29 and generally increased beyond 3 to 4 years after transplantation. Survival patterns for living-donor grafts were similar as those seen for DD grafts. Adjusted hazard ratios for graft failure in United Network for Organ Sharing white Americans ranged between 1.5 and 2.3 (all P<0.001) for 2 to 5 years after transplantation, indicating that lower graft survival is not explained by differences in baseline patient characteristics. CONCLUSIONS Long-term kidney graft survival rates are markedly lower in the United States compared with Europe. Identifying actionable factors explaining long-term graft survival differences between Europe and the United States is a high priority for improving long-term graft survival.
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Gillespie A, Hammer H, Lee J, Nnewihe C, Gordon J, Silva P. Lack of listing status awareness: results of a single-center survey of hemodialysis patients. Am J Transplant 2011; 11:1522-6. [PMID: 21486390 DOI: 10.1111/j.1600-6143.2011.03524.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
This study surveyed hemodialysis patients in an urban transplant center serving a predominantly African American population to identify existing and potential barriers to transplantation. The survey used the Dialysis Patient Transplant Questionnaire (DPTQ) to collect self-reported data including interest in a deceased donor kidney transplant and self-reported listing status. We compared patients' survey data to their UNOS listing and computerized medical record at time of interview. Among the 116 patients surveyed, 83 (71.6%) reported interest in a deceased donor kidney transplant. Eighteen (52.9%) of the 34 patients undergoing pretransplantation workup were unaware of their true listing status, and 88.9% of these patients mistakenly believed they were wait listed. All of the patients who mistakenly thought they were listed were undergoing workup. Finding that a significant number of hemodialysis patients who want a deceased donor kidney transplant mistakenly think they are listed when they are not is a documentable deficiency in communication and a potential barrier to transplantation. The finding highlights a correctable problem in communication and work flow that could help to improve transplant center effectiveness. It also reveals that self-reported waiting list status significantly overestimated true waiting list status for our patients at time of interview.
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Affiliation(s)
- A Gillespie
- Department of Medicine, Section of Nephrology and Kidney Transplantation, Temple University School of Medicine, Philadelphia, PA, USA.
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Malek SK, Keys BJ, Kumar S, Milford E, Tullius SG. Racial and ethnic disparities in kidney transplantation. Transpl Int 2010; 24:419-24. [PMID: 21166727 DOI: 10.1111/j.1432-2277.2010.01205.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Success of renal transplantation, as a viable alternative to dialysis, has been tempered by long-standing racial disparities. Ethnic minorities have less access to transplantation, are less likely to be listed for transplantation, and experience a higher rate of graft failure. Reasons for the existing racial disparities at various stages of the transplantation process are complex and multi-factorial. They include a combination of behavioral, social, environmental, and occupational factors, as well as potential intended or unintended discrimination within the healthcare system. Immunologic factors such as human leukocyte antigen matching, composition of the organ donor pool, and patient immune response, all of which affect post-transplantation graft rejection rates and patient survival, also contribute to health disparities between ethnic groups.
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Affiliation(s)
- Sayeed K Malek
- Division of Transplant Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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Patient Socioeconomic Status Is an Independent Predictor of Operative Mortality. Ann Surg 2010; 252:552-7; discussion 557-8. [DOI: 10.1097/sla.0b013e3181f2ac64] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Samuel SM, Tonelli MA, Foster BJ, Nettel-Aguirre A, Na Y, Williams R, Soo A, Hemmelgarn BR. Overview of the Canadian pediatric end-stage renal disease database. BMC Nephrol 2010; 11:21. [PMID: 20796306 PMCID: PMC2940877 DOI: 10.1186/1471-2369-11-21] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Accepted: 08/26/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Performing clinical research among pediatric end-stage renal disease patients is challenging. Barriers to successful initiation and completion of clinical research projects include small sample sizes and resultant limited statistical power and lack of longitudinal follow-up for hard clinical end-points in most single center studies. DESCRIPTION Existing longitudinal organ failure disease registry and administrative health datasets available within a universal access health care system can be used to study outcomes of end-stage renal disease among pediatric patients in Canada. To construct the Canadian Pediatric End-Stage Renal Disease database, registry data were linked to administrative health data through deterministic linkage techniques creating a research database which consists of socio-demographic variables, clinical variables, all-cause hospitalizations, and relevant outcomes (death and renal allograft loss) for this patient population. The research database also allows study of major cardiovascular events using previously validated administrative data definitions. CONCLUSION Organ failure registry linked to health administrative data can be a powerful tool to perform longitudinal studies in pediatric end-stage renal disease patients. The rich clinical and demographic information found in this database will facilitate study of important medical and non-medical risk factors for death, graft loss and cardiovascular disease among pediatric end-stage renal disease patients.
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Affiliation(s)
- Susan M Samuel
- Division of Pediatric Nephrology, Department of Pediatrics, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary T3B 6A8, Canada.
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Gordon EJ, Ladner DP, Caicedo JC, Franklin J. Disparities in kidney transplant outcomes: a review. Semin Nephrol 2010; 30:81-9. [PMID: 20116652 DOI: 10.1016/j.semnephrol.2009.10.009] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Sociocultural and socioeconomic disparities in graft survival, graft function, and patient survival in adult kidney transplant recipients are reviewed. Studies consistently document worse outcomes for black patients, patients with low income, and patients with less education, whereas better outcomes are reported in Hispanic and Asian kidney transplant recipients. However, the distinct roles of racial/ethnic versus socioeconomic factors remain unclear. Attention to potential pathways contributing to disparities has been limited to immunologic and nonimmunologic factors, for which the mechanisms have yet to be fully illuminated. Interventions to reduce disparities have focused on modifying immunosuppressant regimens. Modifying access to care and health care funding policies for immunosuppressive medication coverage also are discussed. The implementation of culturally sensitive approaches to the care of transplant candidates and recipients is promising. Future research is needed to examine the mechanisms contributing to disparities in graft survival and ultimately to intervene effectively.
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Affiliation(s)
- Elisa J Gordon
- Department of Surgery, Division of Organ Transplantation, Institute for Healthcare Studies, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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Current world literature. Curr Opin Pediatr 2010; 22:246-55. [PMID: 20299870 DOI: 10.1097/mop.0b013e32833846de] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ng FL, Holt DW, Chang RWS, Macphee IAM. Black renal transplant recipients have poorer long-term graft survival than CYP3A5 expressers from other ethnic groups. Nephrol Dial Transplant 2010; 25:628-34. [PMID: 19825838 DOI: 10.1093/ndt/gfp530] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024] Open
Abstract
BACKGROUND African American transplant recipients have poorer long-term outcomes than Caucasian Americans. This difference was not found in French patients, suggesting socialized medicine overcame this disparity. It has also been hypothesized that the difference relates to the higher prevalence of Black individuals who express the metabolic enzyme cytochrome P4503A5 (CYP3A5), with consequent altered handling of immunosuppressive drugs. METHODS Records of 555 (50 Black; 505 non-Black) sequential renal transplant recipients from a single UK centre were analysed. RESULTS Outcomes were significantly worse for Black patients: death-censored graft survival (5-year 66% versus 87%, P = 0.001); halving of year one estimated glomerular filtration rate (mean 8.8 versus 10.8 years, P = 0.008); first-year graft loss (12% versus 3.8%, P = 0.02); and death-censored graft survival in patients surviving the first year with functioning grafts (5-year 77% versus 94%, P = 0.02). Death-censored 5-year graft survival was poorer in Black CYP3A5 expressers than in non-Black CYP3A5 expressers (62% versus 93%, P = 0.002). Following multivariate analysis, the Black group demonstrated poorer graft survival as compared to the non-Black group (hazard ratio 0.46, 95% CI 0.25-0.85, P = 0.002). In a subgroup of genotyped transplant recipients, ethnicity (hazard ratio 0.31, 95% CI 0.15-0.64, P = 0.002), and not CYP3A5 expresser status, persists as an independent risk factor for graft survival following multivariate analysis. CONCLUSION In this cohort of patients with socialized medicine, Black recipients had poorer long-term outcomes than individuals from other ethnic groups. This was independent of CYP3A5 expresser status.
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Affiliation(s)
- Fu Liang Ng
- Cellular and Molecular Medicine, Renal Medicine, St. George's, University of London, Cranmer Terrace, SW17 0RE, UK
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