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Silva RM, Leal R, Marques MG, Rodrigues L, Santos L, Romãozinho C, Alves R, Figueiredo A. Factors Influencing Short-Term Patient Survival in Elderly Kidney Transplant Recipients. Transplant Proc 2023; 55:1400-1403. [PMID: 37295992 DOI: 10.1016/j.transproceed.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/26/2023] [Accepted: 05/12/2023] [Indexed: 06/12/2023]
Abstract
BACKGROUND For the average patient with end-stage renal disease, kidney transplantation improves quality of life and prolongs survival compared with patients on the transplant waiting list who remain on dialysis. Patients ≥65 years of age represent an increasing proportion of adults with end-stage renal disease, and kidney transplantation outcomes remain controversial in this population. The aim of this study was to evaluate factors that may increase 1-year mortality after renal transplantation in older recipients. METHODS A retrospective study that included 147 patients (75.5% men) ≥65 years old (mean age 67.5 ± 2 years) who were transplanted between January 2011 and December 2020. The mean follow-up was 52.6 ± 27.2 months. RESULTS Rehospitalization (<1 year) occurred in 39.5% of patients. Infectious complications were present in 18.4% of patients. The overall mortality rate was 23.1%, and 1-year mortality was 6.8%. As 1-year mortality predictors, we found a positive correlation with factors related to kidney transplant, such as cold ischemia time (P = .003), increasing donor age (P = .001); and factors related to the receptor such as pretransplantation dialysis modality as peritoneal dialysis (P = .04), cardiovascular disease (P = .004), delayed graft function (P = .002), early cardiovascular complications after kidney transplant (P < .001), and early rehospitalizations (P < .001). No correlation was found between 1-year mortality and age, sex, race, body mass index, and type of kidney transplant. CONCLUSION A more rigorous pretransplant evaluation, focusing on cardiovascular disease and strict exclusion criteria, is recommended for patients ≥65 years old.
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Affiliation(s)
- Rita M Silva
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal.
| | - Rita Leal
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal; Nephrology University Clinic, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Maria G Marques
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal; Nephrology University Clinic, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Luís Rodrigues
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal; Nephrology University Clinic, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Lídia Santos
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal; Nephrology University Clinic, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Catarina Romãozinho
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal; Nephrology University Clinic, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Rui Alves
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal; Nephrology University Clinic, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
| | - Arnaldo Figueiredo
- Department of Nephrology, Urology, and Kidney Transplantation, Coimbra University Hospital Center, Coimbra, Portugal; Urology University Clinic, Faculty of Medicine, University of Coimbra, Coimbra, Portugal
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Artiles A, Domínguez A, Subiela JD, Boissier R, Campi R, Prudhomme T, Pecoraro A, Breda A, Burgos FJ, Territo A, Hevia V. Kidney Transplant Outcomes in Elderly Population: A Systematic Review and Meta-analysis. EUR UROL SUPPL 2023; 51:13-25. [PMID: 37006961 PMCID: PMC10064232 DOI: 10.1016/j.euros.2023.02.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2023] [Indexed: 04/04/2023] Open
Abstract
Context Owing to population ageing, a growing number of kidney transplants (KTs) in elderly population are being performed. KT is the best treatment for patients with end-stage renal disease (ESRD). However, in older patients, the decision between dialysis and KT can be difficult due to potential inferior outcomes. Few studies have been published addressing this issue, and literature outcomes are controversial. Objective To conduct a systematic review and meta-analysis to appraise the evidence about outcomes of KT in elderly patients (>70 yr). Evidence acquisition A systematic review and meta-analysis (PROSPERO registration: CRD42022337038) was performed. Search was conducted on PubMed and LILACS databases. Comparative and noncomparative studies addressing outcomes (overall survival [OS], graft survival [GS], complications, delayed graft function [DGF], primary nonfunction, graft loss, estimated glomerular filtrate rate, or acute rejection) of KT in people older than 70 yr were included. Evidence synthesis Of the 10 357 yielded articles, 19 met the inclusion criteria (18 observational studies, one prospective multicentre study, and no randomised controlled trials), enrolling a total of 293 501 KT patients. Comparative studies reporting enough quantitative data for target outcomes were combined. There were significant inferior 5-yr OS (relative risk [RR], 1.66; 95% confidence interval [CI], 1.18-2.35) and 5-yr GS in the elderly group (RR, 1.37; 95% CI, 1.14-1.65) to those in the <70-yr group. Short-term GS at 1 and 3 yr was similar between groups, and similar findings occurred with DGF, graft loss, and acute rejection rates. Few data about postoperative complications were reported. Conclusions Elderly recipients have worse OS at all time points and long-term GS compared with younger recipients (<70 yr). Postoperative complications were under-reported and could not be assessed. The DGF, acute rejection, death with functioning graft, and graft loss were not inferior in elderly recipients. Geriatric assessment in this setting might be useful for selecting better elderly candidates for KT. Patient summary Compared with younger population, kidney transplant in elderly patients has inferior patient and graft survival outcomes in the long term.
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Affiliation(s)
- Alberto Artiles
- Urology Department, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Alcalá University, Madrid, Spain
| | - Ana Domínguez
- Urology Department, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Alcalá University, Madrid, Spain
| | - José Daniel Subiela
- Urology Department, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Alcalá University, Madrid, Spain
| | - Romain Boissier
- Aix-Marseille University, Marseille, France
- Department of Urology & Renal Transplantation, La Conception University Hospital, Assistance-Publique, Marseille, France
| | - Riccardo Campi
- Unit of Urological Robotic Surgery and Renal Transplantation, Careggi Hospital, University of Florence, Florence, Italy
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Thommas Prudhomme
- Department of Urology and Kidney Transplantation, Rangueil University Hospital, Toulouse, France
| | - Alessio Pecoraro
- Unit of Urological Robotic Surgery and Renal Transplantation, Careggi Hospital, University of Florence, Florence, Italy
| | - Alberto Breda
- Urology Department, Fundación Puigvert, University Autónoma of Barcelona, Barcelona, Spain
| | - Francisco Javier Burgos
- Urology Department, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Alcalá University, Madrid, Spain
| | - Angelo Territo
- Urology Department, Fundación Puigvert, University Autónoma of Barcelona, Barcelona, Spain
| | - Vital Hevia
- Urology Department, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Alcalá University, Madrid, Spain
- Corresponding author. Urology, Ctra Colmenar km 9,100, Madrid 28034, Spain. Tel. +34 645 946 800; Fax: +34 913 368 760.
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Cossart AR, Cottrell WN, Mcstea M, Isbel NM, Campbell SB, Staatz CE. Immunosuppressant prescribing patterns in elderly kidney transplant recipients using registry data from Australia and New Zealand. JOURNAL OF PHARMACY PRACTICE AND RESEARCH 2022. [DOI: 10.1002/jppr.1788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | - Megan Mcstea
- Centre for Health Services Research University of Queensland Brisbane Australia
| | - Nicole M. Isbel
- Department of Nephrology University of Queensland at the Princess Alexandra Hospital Brisbane Australia
| | - Scott B. Campbell
- Department of Nephrology University of Queensland at the Princess Alexandra Hospital Brisbane Australia
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Doucet BP, Cho Y, Campbell SB, Johnson DW, Hawley CM, Teixeira-Pinto ARM, Isbel NM. Kidney Transplant Outcomes in elderly Recipients: An Australia and New Zealand Dialysis and Transplant (ANZDATA) Registry Study. Transplant Proc 2021; 53:1915-1926. [PMID: 34275599 DOI: 10.1016/j.transproceed.2021.06.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 06/14/2021] [Indexed: 01/17/2023]
Abstract
BACKGROUND There is an increase in elderly patients receiving kidney transplant internationally. This study describes elderly kidney transplant recipient outcomes in Australia and New Zealand. METHODS The study included all adult first kidney transplant recipients in Australia and New Zealand from 2000 to 2015. Survival and graft outcomes were compared between elderly (≥70 years) and younger (18-69 years) recipients using Cox proportional hazards regression. RESULTS Overall, 10651 kidney transplant recipients were included, of which 279 (2.6%) were elderly adults. The proportion of elderly recipients increased from 0.6 to 4.4% from 2000 to 2015. Compared with younger recipients, elderly recipients were more likely to receive kidneys from deceased donors, elderly donors, and expanded criteria donors. Elderly recipients experienced poorer patient survival with 1- and 5-year survival ranging from 96% to 97% and 79% to 81%, respectively, compared with 97% to 99% and 90% 95% in younger recipients, respectively. Elderly recipients experienced comparable rates of delayed graft function and, in living donor kidney recipients, lower rates of acute rejection. CONCLUSIONS Kidney transplantation in the elderly population is increasing. Although elderly recipients had inferior survival and graft outcomes, elderly recipients generally received poorer quality kidneys. The outcomes achieved in this cohort of elderly adults are encouraging, and improving elderly recipient outcomes should be an important focus for research.
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Affiliation(s)
- Brian Percy Doucet
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia; School of Clinical Medicine, The University of Queensland, Brisbane, Queensland, Australia.
| | - Yeoungjee Cho
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia; Translational Research Institute, Brisbane, Queensland, Australia; Australasian Kidney Trials Network, The University of Queensland, Brisbane, Queensland, Australia
| | - Scott Bryan Campbell
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia; Centre for Kidney Disease Research, The University of Queensland, Brisbane, Queensland, Australia
| | - David Wayne Johnson
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia; Translational Research Institute, Brisbane, Queensland, Australia; Centre for Kidney Disease Research, The University of Queensland, Brisbane, Queensland, Australia
| | - Carmel Mary Hawley
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia; Australasian Kidney Trials Network, The University of Queensland, Brisbane, Queensland, Australia; Centre for Kidney Disease Research, The University of Queensland, Brisbane, Queensland, Australia; Australia and New Zealand Dialysis and Transplant Registry, South Australian Health and Medical Research Institute (SAHMRI), Adelaide, South Australia, Australia
| | - Armando Rogerió Martins Teixeira-Pinto
- Centre for Kidney Research, The Children's Hospital at Westmead, Sydney, New South Wales, Australia; School of Public Health, University of Sydney, Sydney, New South Wales, Australia
| | - Nicole Maree Isbel
- Department of Nephrology, Princess Alexandra Hospital, Woolloongabba, Queensland, Australia; Translational Research Institute, Brisbane, Queensland, Australia; Centre for Kidney Disease Research, The University of Queensland, Brisbane, Queensland, Australia
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So S, Au EH, Lim WH, Lee VW, Wong G. Factors Influencing Long-Term Patient and Allograft Outcomes in Elderly Kidney Transplant Recipients. Kidney Int Rep 2020; 6:727-736. [PMID: 33732987 PMCID: PMC7938063 DOI: 10.1016/j.ekir.2020.11.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/19/2020] [Accepted: 11/30/2020] [Indexed: 11/19/2022] Open
Abstract
Introduction Individuals aged ≥65 years are increasingly prevalent on the waitlist for kidney transplantation, yet evidence on recipient and donor factors that define optimal outcomes in elderly patients after kidney transplantation is scarce. Methods We used multivariable Cox regression modeling to determine the factors associated with all-cause death, death with a functioning graft, and overall and death-censored graft survival, using data from the Australia and New Zealand Dialysis and Transplant (ANZDATA) registry. Results A total of 802 kidney transplant recipients aged ≥65 years underwent their first transplantation between June 2006 and December 2016. Median age at transplantation was 68 years (interquartile range = 66−69 years). The 1-year and 5-year overall patient and graft survivals (95% confidence interval [CI]) were 95.1 (93.5−96.7) and 79.0 (75.1−82.9), and 92.9 (91.1−94.7) and 75.4 (71.3−79.5), respectively. Factors associated with higher risks of all-cause death included prevalent coronary artery disease (adjusted hazard ratio [95% confidence interval] = 1.47 [1.03–2.11]), cerebrovascular disease (1.99 [1.26–3.16]), increasing graft ischemic time (1.06 per hour [1.03–1.09]), donor age (1.02 per year [1.01–1.03]), delayed graft function (1.64 [1.13−2.39]), and peritoneal dialysis pretransplantation (1.71 [1.17–2.51]). Conclusion Prevalent vascular disease and peritoneal dialysis as a pretransplantation dialysis modality are risk factors associated with poorer outcomes in transplant recipients aged ≥65 years. Careful selection and evaluation of potential candidates may improve graft and patient outcomes in older patients.
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Affiliation(s)
- Sarah So
- Department of Renal Medicine, Westmead Hospital, Sydney, Australia
- School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
- Correspondence: Sarah So, Department of Renal Medicine, Westmead Hospital, Corner of Darcy and Hawkesbury Roads, Westmead, Sydney 2145, Australia.
| | - Eric H.K. Au
- School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
- Centre for Kidney Research, The Children’s Hospital at Westmead, Sydney, Australia
| | - Wai H. Lim
- Department of Renal Medicine, Sir Charles Gairdner Hospital, Perth, Australia
- Medical School, University of Western Australia, Perth, Australia
| | - Vincent W.S. Lee
- Department of Renal Medicine, Westmead Hospital, Sydney, Australia
- School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
- Centre for Kidney Research, The Children’s Hospital at Westmead, Sydney, Australia
| | - Germaine Wong
- Department of Renal Medicine, Westmead Hospital, Sydney, Australia
- School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
- Centre for Kidney Research, The Children’s Hospital at Westmead, Sydney, Australia
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Renal transplantation in the elderly: Outcomes and recommendations. Transplant Rev (Orlando) 2020; 34:100530. [DOI: 10.1016/j.trre.2020.100530] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/09/2019] [Accepted: 12/18/2019] [Indexed: 12/20/2022]
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DeLeonibus A, Mitro G, Brooks J, Rees M, Ortiz J. Alemtuzumab Induction Is Associated With Equalization of Graft Outcomes Between Elderly and Nonelderly Kidney Transplant Recipients: A Single-Center Report. EXP CLIN TRANSPLANT 2019; 18:284-291. [PMID: 31050614 DOI: 10.6002/ect.2018.0296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES Alemtuzumab (monoclonal anti-CD52 antibody) provides profound lymphocyte depletion and offers numerous advantages as an induction agent. Elderly recipients (> 65 years old) traditionally have inferior posttransplant outcomes versus younger recipients. We investigated short-term and long-term patient and graft survival rates following alemtuzumab induction in elderly recipients. MATERIALS AND METHODS This retrospective analysis, which included 676 renal allograft transplant recipients with alemtuzumab induction, was conducted at the University of Toledo Medical Center between March 2006 and November 2015. We used 2-sided t test, Pearson chi-square test, Fisher exact test, and Cox proportional hazard regressions with 95% confidence interval for analyses. P < .05 was significant. RESULTS Elderly recipients were more likely to receive a kidney from an inferior donor (deceased donor: 82% vs 72.4%; P = .030) and have higher mean kidney donor profile index (46.2 vs 38.4; P = .024) than nonelderly recipients. Elderly recipients were more likely to experience delayed graft function (15.1% vs 8.5%; P = .038). Elderly recipients demonstrated death-censored graft survival (1 year: 95.4% vs 93.1%; 3 years: 88.5% vs 93.3%; 5 years: 83.1% vs 86.4%) and rejection rates (1 year: 19.8% vs 21.2%; 3 years: 22.1% vs 25.3%; 5 years: 23.8% vs 26.9%) similar to nonelderly recipients. Elderly recipients had significantly higher overall mortality rates than recipients under 65 years old (29.8% vs. 13.2%; P = .001). Although 1-year patient survival was similar to younger recipients (94.8% vs 96.3%; P = .431), 3-year (80.0% vs 91.5%; P = .006) and 5-year (72.9% vs 86.2%; P = .19) rates were significantly decreased in elderly recipients. CONCLUSIONS Elderly age is not a predictor of rejection or death-censored graft loss in individuals who receive alemtuzumab induction. Despite elevated overall mortality, elderly recipients induced with alemtuzumab demonstrated rejection, graft, and short-term patient survival rates similar to younger recipients.
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Affiliation(s)
- Anthony DeLeonibus
- From the College of Medicine and Life Sciences, University of Toledo, Toledo, Ohio, USA
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Legeai C, Andrianasolo RM, Moranne O, Snanoudj R, Hourmant M, Bauwens M, Soares J, Jacquelinet C, Couchoud C, Macher MA. Benefits of kidney transplantation for a national cohort of patients aged 70 years and older starting renal replacement therapy. Am J Transplant 2018; 18:2695-2707. [PMID: 30203618 DOI: 10.1111/ajt.15110] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 07/20/2018] [Accepted: 08/08/2018] [Indexed: 02/06/2023]
Abstract
Our objectives were to evaluate kidney transplantation survival benefit in people aged ≥70 who were receiving renal replacement therapy (RRT) and to identify their risk factors for posttransplant mortality. This study included all patients in the national French Renal Epidemiology and Information Network registry who started RRT between 2002 and 2013 at age ≥70. Mortality risk was compared between patients with transplants; on the waiting list; and on dialysis matched for age, gender, comorbidities, and time on dialysis. Of the 41 716 elderly patients starting RRT, 1219 (2.9%) were on the waiting list and 877 (2.1%) underwent transplantation during the follow-up. Until month 3, transplant patients had a risk of death triple that of the wait-listed group. Although the risk was halved at month 9, the perioperative risk was still not offset by month 36. Compared with matched dialysis patients (n = 2183), transplant patients were not at significantly increased perioperative risk and had a lower mortality risk starting at month 3. Risk factors for posttransplant mortality were diabetes, cardiovascular comorbidities, and dialysis duration >2 years. Among older dialysis patients, 20% had neither cardiovascular comorbidity nor diabetes. Systematic early assessment of the eligibility of elderly patients for kidney transplantation is recommended to expand registration to patients with poor survival on dialysis and no cardiovascular comorbidity.
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Affiliation(s)
- Camille Legeai
- Organ and Tissue Procurement and Transplantation Department, Agence de la biomédecine, Saint Denis La Plaine, France
| | - Roland M Andrianasolo
- Organ and Tissue Procurement and Transplantation Department, Agence de la biomédecine, Saint Denis La Plaine, France
| | - Olivier Moranne
- Nephrologie-Dialyses-Apherese Department, Carémeau University Hospital, Nîmes, France.,IURC, EA 2415, LBERC, Montpellier University, Nîmes, France
| | - Renaud Snanoudj
- Nephrology and Transplantation Department, Foch Hospital, Suresnes, France.,Inserm U1018, Team 5, CESP, Versailles Saint-Quentin-en-Yvelines University, Paris Saclay University, Villejuif, France
| | | | | | - Joaquim Soares
- National Federation for Aid to Renal Insufficiency patients, Paris, France
| | | | - Cécile Couchoud
- REIN registry, Agence de la biomédecine, Saint Denis la Plaine, France
| | - Marie-Alice Macher
- Organ and Tissue Procurement and Transplantation Department, Agence de la biomédecine, Saint Denis La Plaine, France
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Single-center analysis of infectious complications in older adults during the first year after kidney transplantation. Eur J Clin Microbiol Infect Dis 2018; 38:141-148. [PMID: 30353487 DOI: 10.1007/s10096-018-3405-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/15/2018] [Indexed: 12/29/2022]
Abstract
Infections are among the top three causes of death of older adults in the first year after kidney transplantation (KT). Our aim was to describe infectious complications among KT recipients aged ≥ 65 during the first 12 months post-transplant. Single-center retrospective cohort study. Ninety-one KTs had been performed in patients ≥ 65 years of age between 2011 and 2015. 92.3% of the patients developed at least one infection. Infectious episodes increased the risk of future infection by 10% (p = 0.0018) with each infection portending a greater risk. At a patient level, viral (71.4%) and bacterial (70.2%) infections predominated. Urinary tract infections were the most frequent complication (30.3%), followed by cytomegalovirus infections (22.7%). Infections were the main reason for readmission. 7.7% of the patients developed rejection; and overall 3.3% lost their graft. Mortality at 1 year was 9.9%. Older KT recipients have a high incidence of infectious complications the first year after KT. Infections were the number one reason for readmission, and an infection episode predicted future infections for the individual patient. Despite these complications, the majority of older KT recipients were alive with a functioning graft at 1 year.
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