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Gupta A, Grasing MJ, Young KJ, Montgomery RN, Murillo DJ, Cibrik DM. Pretransplant Cognitive Function and Kidney Transplant Outcomes: A Prospective Cohort Study. Kidney Med 2024; 6:100872. [PMID: 39206246 PMCID: PMC11350261 DOI: 10.1016/j.xkme.2024.100872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024] Open
Abstract
Background & Hypothesis Cognitive impairment is common in patients being evaluated for a kidney transplant (KT). The association between pretransplant cognitive function and posttransplant outcomes is unclear. Study Design We performed a prospective cohort study to assess the association between pretransplant cognitive function and clinically relevant posttransplant outcomes. Setting and Population In this single center study, participants from the transplant clinic were evaluated during their pretransplant clinic visits and followed prospectively. Outcomes Our primary outcome measure was allograft function. Secondary outcomes were length of hospitalization for KT, hospital readmission within 30 and 90 days, graft loss, graft rejection within 90 days and 1 year, and mortality. Analytic Approach We measured cognitive function with the Montreal Cognitive Assessment (MoCA) test. We assessed the association of pretransplant MoCA score with posttransplant outcomes; we used linear mixed effects models to assess the association with the change in estimated glomerular filtration rate, Poisson regression for length of hospitalization, Cox proportional hazard model for graft loss and mortality, and a logistic regression model for readmission and rejection. Results We followed 501 participants for 2.7 ± 1.5 years. The mean age of the patients was 53 ± 14 years and the mean pretransplant MoCA score was 25 ± 3. Lower pretransplant MoCA scores did not adversely affect the primary outcome of allograft function or the secondary outcomes. Although higher MoCA scores predicted a higher decline in graft function (β = -0.28, 95% CI: -0.55 to -0.01, P = 0.04), the effect was small and not clinically significant. Older age was associated with longer hospitalization, lower likelihood of rejection, and higher mortality. Deceased donor KT (vs living donor KT) was associated with longer hospitalization but better graft function. Longer time receiving dialysis before KT was associated with longer hospitalization. A history of diabetes mellitus was associated with higher mortality. Limitations Single center study limiting generalizability. Conclusions Pretransplant MoCA scores were not associated with the primary outcome of allograft function or the secondary outcomes.
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Affiliation(s)
- Aditi Gupta
- Division of Nephrology and Hypertension, Department of Internal Medicine and Neurology, University of Kansas Medical Center, Kansas City, KS
| | - Michael J. Grasing
- Division of Nephrology and Hypertension, Department of Internal Medicine and Neurology, University of Kansas Medical Center, Kansas City, KS
| | - Kate J. Young
- Department of Biostatistics and Data Science, University of Kansas Medical Center, Kansas City, KS
| | - Robert N. Montgomery
- Department of Biostatistics and Data Science, University of Kansas Medical Center, Kansas City, KS
| | - Daniel J. Murillo
- Department of Surgery, University of Kansas Medical Center, Kansas City, KS
| | - Diane M. Cibrik
- Division of Nephrology and Hypertension, Department of Internal Medicine and Neurology, University of Kansas Medical Center, Kansas City, KS
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Quint EE, Pol RA, Segev DL, McAdams-DeMarco MA. Age Is Just a Number for Older Kidney Transplant Patients. Transplantation 2024:00007890-990000000-00760. [PMID: 38771060 DOI: 10.1097/tp.0000000000005073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The rise in the mean age of the global population has led to an increase in older kidney transplant (KT) patients. This demographic shift, coupled with the ongoing organ shortage, requires a nuanced understanding of which older adults are most suitable for KT. Recognizing the increased heterogeneity among older adults and the limitations of solely relying on chronological age, there is a need to explore alternative aging metrics beyond chronological age. In this review, we discuss the impact of older age on access to KT and postoperative outcomes. Emphasizing the need for a comprehensive evaluation that extends beyond chronological age, we explore alternative aging metrics such as frailty, sarcopenia, and cognitive function, underscoring their potential role in enhancing the KT evaluation process. Most importantly, we aim to contribute to the ongoing discourse, fostering an optimized approach to KT for the rapidly growing population of older adults.
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Affiliation(s)
- Evelien E Quint
- Division of Transplant Surgery, Department of Surgery, University Medical Center Groningen, Groningen, the Netherlands
| | - Robert A Pol
- Division of Transplant Surgery, Department of Surgery, University Medical Center Groningen, Groningen, the Netherlands
| | - Dorry L Segev
- Department of Surgery, NYU Grossman School of Medicine and NYU Langone Health, New York, NY
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Mara A McAdams-DeMarco
- Department of Surgery, NYU Grossman School of Medicine and NYU Langone Health, New York, NY
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
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3
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Teles MS, Ruck JM, Jefferis A, Helmy S, Oh ES, Murriel EC, Lai JC, King EA. A pragmatic tool to screen for pre-transplant cognitive impairment among potential candidates for liver transplant. Clin Transplant 2024; 38:e15232. [PMID: 38289890 DOI: 10.1111/ctr.15232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 12/01/2023] [Accepted: 12/10/2023] [Indexed: 02/01/2024]
Abstract
INTRODUCTION Cognitive impairment (CI) among liver transplant (LT) candidates is associated with increased risk of waitlist mortality and inferior outcomes. While formal neurocognitive evaluation is the gold standard for CI diagnosis, the Montreal Cognitive Assessment (MoCA) is often used for first-line cognitive screening. However, MoCA requires specialized training and may be too lengthy for a busy evaluation appointment. An alternate approach may be the Quick Dementia Rating System (QDRS), which is patient- and informant-based and can be administered quickly. We compared potential LT candidates identified by MoCA and QDRS as potentially benefiting from further formal cognitive evaluation. METHODS We identified 46 potential LT candidates enrolled at a single center of a prospective, observational cohort study who were administered MoCA and QDRS during transplant evaluation (12/2021-12/2022). Scores were dichotomized as (1) normal versus abnormal and (2) normal/mild impairment versus more-than-mild impairment. We calculated sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of QDRS compared to MoCA. RESULTS By MoCA, this population had a prevalence of 48% normal cognition, 48% mild, 4% moderate, and 0% severe impairment. This was categorized as 96% normal/mild and 4% more-than-mild impairment. When comparing to MoCA cognitive screening, QDRS had a sensitivity of 61%, specificity of 56%, NPV of 56%, and PPV of 61%. When identifying more-than-mild impairment, QDRS had a sensitivity of 100%, specificity of 73%, NPV of 100%, and PPV of 10%. CONCLUSION The high sensitivity and NPV of QDRS in identifying more-than-mild impairment suggests it could identify potential LT candidates who would benefit from further formal cognitive evaluation. The ability to administer QDRS quickly and remotely makes it a pragmatic option for pre-transplant screening.
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Affiliation(s)
- Mayan S Teles
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jessica M Ruck
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Alexa Jefferis
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Sherif Helmy
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Esther S Oh
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Emily C Murriel
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Jennifer C Lai
- Department of Medicine, University of California San Francisco Medical Center, San Francisco, California, USA
| | - Elizabeth A King
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Schietzel S, Kressig RW, Huynh-Do U. Screening of cognitive performance in kidney transplant recipients: a mini review. FRONTIERS IN NEPHROLOGY 2023; 3:1238501. [PMID: 37780580 PMCID: PMC10539592 DOI: 10.3389/fneph.2023.1238501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 08/21/2023] [Indexed: 10/03/2023]
Abstract
Why should we screen? The prevalence of cognitive impairment in kidney transplant recipients (KTRs) is up to 58%. The 10-year graft loss and mortality rates are above 30% and 50%, respectively, and executive malfunctioning increases disadvantageous outcomes. What causes cognitive impairment in KTRs? Strong risk factors are older age and chronic kidney disease. However, causes are multifactorial and include cardiovascular, cerebrovascular, neurodegenerative, inflammatory, uremic, psychiatric, and lifestyle-related susceptibilities. How should we screen? KTR-specific validated instruments or strategies do not exist. The central element should be a multidomain cognitive screening test that is sensitive to mild cognitive impairment, corrects for age and education, and includes executive functions testing. Cognitive trajectories, effects on everyday life and psychiatric comorbidities should be assessed by integrating the perspectives of both patients and knowledgeable informants. When should we screen? Screening should not be postponed if there is suspicion of impaired cognition. Different time points after transplantation tend to have their own characteristics. Who should conduct the screening? Screening should not be limited to specialists. It can be carried out by any healthcare professional who has received a limited amount of training. What are the benefits of screening? Screening does not provide a diagnosis. However, suggestive results change care in multiple ways. Goals are: Initiation of professional dementia work-up, securing of adherence, anticipation of potential complications (delirium, falls, frailty, functional impairment, malnutrition, etc.), mitigation of behavioral disorders, adjustment of diagnostic and therapeutic "load", reduction of caregiver burden and meeting of changing needs. We summarize data on the prevalence, risk factors and sequelae of cognitive impairment in KTRs. We also discuss the requirements for appropriate screening strategies and provide guiding principles regarding appropriate and safe care.
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Affiliation(s)
- Simeon Schietzel
- Division of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Reto W. Kressig
- University Department of Geriatric Medicine FELIX PLATTER, and University of Basel, Basel, Switzerland
| | - Uyen Huynh-Do
- Division of Nephrology and Hypertension, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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Gupta A. Cognitive Function and Kidney Transplantation: Putting Current Data into Clinical Perspective. Kidney Med 2022; 4:100566. [PMID: 36438024 PMCID: PMC9681637 DOI: 10.1016/j.xkme.2022.100566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Aditi Gupta
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Kanas Medical Center, Kansas City, Kansas
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Tariq H, Ramakrishnan M, Gupta A. Insights into Cognitive Brain Health in Chronic Kidney Disease. GERONTOLOGY & GERIATRICS : RESEARCH 2022; 8:1074. [PMID: 37671071 PMCID: PMC10478617 DOI: 10.26420/gerontolgeriatrres.2022.1074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Cognitive impairment and Chronic Kidney Disease (CKD) are common in older adults. With advances in medicine, the average lifespan is expected to increase, further increasing the prevalence of both conditions. The mechanisms underlying cognitive impairment in CKD are unclear. While mild-moderately low estimated glomerular filtration rate (eGFR) may not be associated with cognitive impairment, severely decreased eGFR and albuminuria do. Patients on dialysis have a high prevalence of cognitive impairment. Cognitive function improves after kidney transplantation. However, some residual cognitive deficits persist after transplantation, indicating that restoring the kidney function alone may not be enough to restore cognitive function, and other etiological factors may play a role. Albuminuria, another marker of CKD is also associated with cognitive impairment. However, albuminuria is often undiagnosed. Improving early identification and management of patients with albuminuria may be a good population-based dementia prevention strategy. Other factors associated with cognitive impairment in CKD include anemia and other metabolic derangements commonly observed in CKD. In this article, we reviewed the prevalence of cognitive impairment in CKD, the potential mechanisms underlying cognitive impairment in CKD, andthecurrent evidence on the association between cognitive impairment and eGFR and albuminuria.
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Affiliation(s)
- H Tariq
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Kansas Medical Center, USA
| | - M Ramakrishnan
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Kansas Medical Center, USA
| | - A Gupta
- Division of Nephrology and Hypertension, Department of Internal Medicine, University of Kansas Medical Center, USA
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Pépin M, Ferreira AC, Arici M, Bachman M, Barbieri M, Bumblyte IA, Carriazo S, Delgado P, Garneata L, Giannakou K, Godefroy O, Grodzicki T, Klimkowicz-Mrowiec A, Kurganaite J, Liabeuf S, Mocanu CA, Paolisso G, Spasovski G, Vazelov ES, Viggiano D, Zoccali C, Massy ZA, Więcek A. Cognitive disorders in patients with chronic kidney disease: specificities of clinical assessment. Nephrol Dial Transplant 2021; 37:ii23-ii32. [PMID: 34718757 PMCID: PMC8713156 DOI: 10.1093/ndt/gfab262] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Indexed: 12/20/2022] Open
Abstract
Neurocognitive disorders are frequent among chronic kidney disease (CKD) patients. Identifying and characterizing cognitive impairment (CI) can help to assess the ability of adherence to CKD risk reduction strategy, identify potentially reversible causes of cognitive decline, modify pharmacotherapy, educate the patient and caregiver and provide appropriate patient and caregiver support. Numerous factors are associated with the development and progression of CI in CKD patients and various conditions can influence the results of cognitive assessment in these patients. Here we review clinical warning signs that should lead to cognitive screening; conditions frequent in CKD at risk to interfere with cognitive testing or performance, including specificities of cognitive assessment in dialysis patients or after kidney transplantation; and available tests for screening and observed cognitive patterns in CKD patients.
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Affiliation(s)
| | - Ana Carina Ferreira
- Department of Nephrology, Centro Hospitalar e Universitário de Lisboa Central–Hospital Curry Cabral, Lisbon, Portugal
- Department of Nephology, Universidade Nova de Lisboa–Faculdade de Ciências Médicas, Lisbon, Portugal
| | - Mustafa Arici
- Department of Internal Medicine, Division of Nephrology, Faculty of Medicine, Hacetepe University, Ankara, Turkey
| | - Maie Bachman
- Department of Health Technologies, School of Information Technologies, Tallinn University of Technology, Tallinn, Estonia
| | - Michelangela Barbieri
- Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Inga Arune Bumblyte
- Department of Nephrology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Sol Carriazo
- Department of Nephrology and Hypertension, IIS-Fundacion Jimenez Diaz UAM, Madrid, Spain
| | - Pilar Delgado
- Department of Neurology, Vall d’Hebron Hospital, Universitat Autonoma de Barcelona, Barcelona, Spain
| | - Liliana Garneata
- Department of Internal Medicine and Nephrology, “Carol Davila” University of Medicine and Pharmacy, “Dr Carol Davila” Teaching Hospital of Nephrology, Bucharest, Romania
| | - Konstantinos Giannakou
- Department of Health Sciences, School of Sciences, European University Cyprus, Nicosia, Cyprus
| | - Olivier Godefroy
- Department of Neurology, Amiens University Hospital, and Laboratory of Functional Neurosciences (UR UPJV 4559), Jules Verne University of Picardie, Amiens, France
| | - Tomasz Grodzicki
- Department of Internal Medicine and Gerontology, Jagiellonian University Medical College, Cracow, Poland
| | | | - Justina Kurganaite
- Department of Nephrology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Sophie Liabeuf
- Department of Pharmacology, Amiens University Medical Center, Amiens, France
- MP3CV Laboratory, EA7517, University of Picardie Jules Verne, Amiens, France
| | - Carmen Antonia Mocanu
- Department of Internal Medicine and Nephrology, “Carol Davila” University of Medicine and Pharmacy, “Dr Carol Davila” Teaching Hospital of Nephrology, Bucharest, Romania
| | - Giuseppe Paolisso
- Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, Naples, Italy
- Mediterranea Cardiocentro, Naples, Italy
| | - Goce Spasovski
- Department of Nephrology, Clinical Centre “Mother Theresa”, Saints Cyril and Methodius University, Skopje, North Macedonia
| | | | - Davide Viggiano
- Department of Nephrology, University of Campania “Luigi Vanvitelli”, Naples; BIOGEM, Ariano Irpino, Italy
| | - Carmine Zoccali
- Renal Research Institute, New York, NY, USA
- Associazione Ipertensione Nefrologia Trapianto Renale, Reggio Calabria, Italy
| | - Ziad A Massy
- Paris-Saclay University, UVSQ, Inserm, Clinical Epidemiology Team, Centre de Recherche en Epidémiologie et Santé des Populations (CESP), Villejuif, France
- Department of Nephrology, Ambroise Paré University Medical Center, APHP, Paris, France
| | - Andrzej Więcek
- Department of Nephrology, Transplantation and Internal Medicine, Medical University of Silesia, Katowice, Poland
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Chu NM, Segev D, McAdams-DeMarco MA. Interventions to Preserve Cognitive Functioning Among Older Kidney Transplant Recipients. CURRENT TRANSPLANTATION REPORTS 2020; 7:346-354. [PMID: 33777649 PMCID: PMC7992368 DOI: 10.1007/s40472-020-00296-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/07/2020] [Indexed: 12/30/2022]
Abstract
PURPOSE OF REVIEW To summarize the research on effective interventions for preserving cognitive function and prevent cognitive decline in patients with end-stage kidney disease (ESKD) who are undergoing dialysis and/or kidney transplantation (KT). RECENT FINDINGS Among ESKD patients undergoing hemodialysis, exercise training has been administered through home-based and intradialytic interventions. Additionally, one pilot study identified intradialytic cognitive training, electronic brain games, as an intervention to preserve cognitive function among patients undergoing hemodialysis. Fewer studies have investigated interventions to preserver cognitive function among KT recipients. To date, the only randomized controlled trial in this population identified B-vitamin supplements as an intervention to preserve cognitive function. The evidence from these trials support a short-term benefit of cognitive and exercise training as well as B-vitamin supplementation among patients with ESKD. Future studies should: 1) replicate these findings, 2) identify interventions specific to KT candidates, and 3) investigate the synergistic impact of both cognitive and exercise training. SUMMARY Cognitive prehabilitation, with cognitive and/or exercise training, may be novel interventions for KT candidates that not only reduces delirium risk and long-term post-KT cognitive decline but also prevents dementia.
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Affiliation(s)
- Nadia M. Chu
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Dorry Segev
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Mara A. McAdams-DeMarco
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
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Abstract
Purpose of the review Cognitive impairment is common in kidney transplant recipients and affects quality of life, graft survival, morbidity, and mortality. In this review article we discuss the epidemiology, diagnosis, pathophysiology and future directions for cognitive impairment in kidney transplantation. We describe the potential role of pre-transplant cognition, immunosuppression and peri-transplant factors in post -transplant cognitive impairment. Recent Findings A majority of patients with kidney transplant have cognitive impairment. Cognitive impairment affects both pre-transplant evaluation and post-transplant outcomes. Failure to identify patients with cognitive impairment can withhold appropriate care and timely intervention. Summary Cognitive impairment is common in kidney transplant and affects outcomes. Studies addressing modifiable risk factors and possible interventions to slow cognitive decline in patients with kidney disease are needed.
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Chu NM, McAdams-DeMarco MA. Exercise and cognitive function in patients with end-stage kidney disease. Semin Dial 2019; 32:283-290. [PMID: 30903625 PMCID: PMC6606387 DOI: 10.1111/sdi.12804] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
In this review we summarize the research pertaining to the role of exercise in preventing cognitive decline in patients with end-stage kidney disease (ESKD). Impairment in cognitive function, especially in executive function, is common in patients with ESKD, and may worsen with maintenance dialysis as a result of retention of uremic toxins, recurrent cerebral ischemia, and high burden of inactivity. Cognitive impairment may lead to long-term adverse consequences, including dementia and death. Home-based and intradialytic exercise training (ET) are among the nonpharmacologic interventions identified to preserve cognitive function in ESKD. Additionally, cognitive training (CT) is an effective approach recently identified in this population. While short-term benefits of ET and CT on cognitive function were consistently observed in patients undergoing dialysis, more studies are needed to replicate these findings in diverse populations including kidney transplant recipients with long-term follow-up to better understand the health and quality of life consequences of these promising interventions. ET as well as CT are feasible interventions that may preserve or even improve cognitive function for patients with ESKD. Whether these interventions translate to improvements in quality of life and long-term health outcomes, including dementia prevention and better survival, are yet to be determined.
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Affiliation(s)
- Nadia M. Chu
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
| | - Mara A. McAdams-DeMarco
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD
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Amatneeks TM, Hamdan AC. Montreal Cognitive Assessment for cognitive assessment in chronic kidney disease: a systematic review. J Bras Nefrol 2019; 41:112-123. [PMID: 31063176 PMCID: PMC6534019 DOI: 10.1590/2175-8239-jbn-2018-0086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 10/30/2018] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION There is evidence in the literature that cognitive impairment is more prevalent in individuals with chronic kidney disease (CKD) than in the general population. The Montreal Cognitive Assessment (MoCA) is an instrument with a good application profile for cognitive evaluation of patients with CKD-like impairments. The objective of this study is to perform a systematic review of MoCA use in the context of CKD. METHOD The keywords "Montreal Cognitive Assessment", "Kidney Disease" and "Chronic Kidney Disease" were used to search the databases. The inclusion criteria were: a) empirical articles; b) approach to cognitive impairment in CKD; c) papers in Portuguese and English. RESULTS The studies were mostly cross-sectional, published in medical journals, with research carried out mostly in Europe. About 45% of the studies had samples of less than 150 participants and variations in the prevalence of cognitive impairment were found ranging from 28.9% to 74.6%. The cutoff point for the identification of the impairment presented variation between the studies. DISCUSSION The results' analysis demonstrates the need for more complete studies on MoCA scoring and adaptation in its different versions. We recommend to the health professionals who will use the results in the clinical setting that the interpretation of the results be made in the light of studies more related to the context lived by the patients. CONCLUSIONS The instrument is efficient to be used in several stages and treatment modalities of the disease. We point to the need to adapt a cut-off point for the instrument in the different translations of the instrument.
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Affiliation(s)
- Thaís Malucelli Amatneeks
- Fundação Pró-Renal, Setor de Psicologia, Curitiba, PR, Brasil
- Universidade Federal do Paraná, Departamento de Psicologia,
Curitiba, PR, Brasil
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12
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Nöhre M, Bauer-Hohmann M, Klewitz F, Kyaw Tha Tun EM, Tegtbur U, Pape L, Schiffer L, de Zwaan M, Schiffer M. Prevalence and Correlates of Cognitive Impairment in Kidney Transplant Patients Using the DemTect-Results of a KTx360 Substudy. Front Psychiatry 2019; 10:791. [PMID: 31736808 PMCID: PMC6837156 DOI: 10.3389/fpsyt.2019.00791] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/04/2019] [Indexed: 12/14/2022] Open
Abstract
Cognitive impairment in kidney transplantation (KTx) patients is associated with allograft survival and mortality. However, the prevalence of cognitive impairment after KTx is still understudied. Thus, we aimed to assess the prevalence of cognitive impairment in KTx patients and to identify sociodemographic, medical, donation-specific, and psychological variables associated with cognitive impairment. In this cross-sectional two-center study, 583 KTx patients participated in a structured post-transplant care program. The DemTect was used to assess cognition, and cognitive impairment was defined as a score of < 13. Mean age was 52.11 years, 59% were male, 27.4% had ≥12 years of school attendance, and 85.9% had hypertension. The prevalence of cognitive impairment was 15.6%. Cognitive impairment was significantly associated with higher age, male sex, lower educational level, subjective perception of cognitive decline, higher rates of hypertension, lower kidney functioning, and obesity (BMI > 30 kg/m2). Using logistic regression analysis, all variables except age remained significant. Our results suggest that cognitive impairment affects a significant number of patients after KTx. Transplant centers may consider screening for cognitive impairment using objective tests, especially in patients with a high-risk profile. Furthermore, studies with longitudinal designs are required in order to assess moderators and mediators for cognitive trajectories.
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Affiliation(s)
- Mariel Nöhre
- Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany.,Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany
| | - Maximilian Bauer-Hohmann
- Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany.,Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany
| | - Felix Klewitz
- Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany.,Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany
| | - Eva-Marie Kyaw Tha Tun
- Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany.,Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany.,Department of Psychosomatic Medicine and Psychotherapy, University of Göttingen Medical Centre, Göttingen, Germany
| | - Uwe Tegtbur
- Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany.,Department of Sports Medicine, Hannover Medical School, Hannover, Germany
| | - Lars Pape
- Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany.,Department of Pediatric Kidney, Liver, and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - Lena Schiffer
- Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany.,Department of Pediatric Kidney, Liver, and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - Martina de Zwaan
- Department of Psychosomatic Medicine and Psychotherapy, Hannover Medical School, Hannover, Germany.,Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany
| | - Mario Schiffer
- Project Kidney Transplantation 360° (NTX360°), Hannover Medical School, Hannover, Germany.,Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany.,Department of Nephrology and Hypertension, University Hospital Erlangen, Erlangen, Germany
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Shi Y, Liu Z, Shen Y, Zhu H. A Novel Perspective Linkage Between Kidney Function and Alzheimer's Disease. Front Cell Neurosci 2018; 12:384. [PMID: 30429775 PMCID: PMC6220726 DOI: 10.3389/fncel.2018.00384] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 10/08/2018] [Indexed: 02/03/2023] Open
Abstract
It has long been believed that kidney function is linked to brain activity. Clinical studies demonstrate that patients with chronic kidney disease (CKD) are more prone to cognitive impairment and Alzheimer's disease (AD), and the degree of cognitive impairment is closely related to CKD progression and renal failure. Moreover, the fact that cognitive function in CKD patients is significantly improved after successful kidney transplantation reveals a linkage between CKD and AD. However, the mechanisms behind this linkage are unclear. The physiological function of the kidney is to maintain the stability of the internal environment, including the cerebrovascular circulation, whereas abnormal kidney function often leads to ischemia and hypoxia. Many CKD patients experience chronic hypoxia, and many urinary toxins accumulate after renal function is impaired. In this mini review, we will propose a novel perspective on the association between AD and CKD and the connection between the kidney and brain.
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Affiliation(s)
- Yan Shi
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing, China
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Research Institute of Nephrology, Zhengzhou University, Zhengzhou, China
| | - Zhangsuo Liu
- Department of Nephrology, The First Affiliated Hospital of Zhengzhou University, Research Institute of Nephrology, Zhengzhou University, Zhengzhou, China
| | - Yong Shen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing, China
- Center for Advanced Therapeutic Strategies for Brain Disorders, The Roskamp Institute, Sarasota, FL, United States
| | - Hanyu Zhu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing, China
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