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Campbell DJ, Coller JM, Gong FF, McGrady M, Boffa U, Shiel L, Liew D, Stewart S, Owen AJ, Krum H, Reid CM, Prior DL. Kidney age - chronological age difference (KCD) score provides an age-adapted measure of kidney function. BMC Nephrol 2021; 22:152. [PMID: 33902478 PMCID: PMC8077774 DOI: 10.1186/s12882-021-02324-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/23/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Given the age-related decline in glomerular filtration rate (GFR) in healthy individuals, we examined the association of all-cause death or cardiovascular event with the Kidney age - Chronological age Difference (KCD) score, whereby an individual's kidney age is estimated from their estimated GFR (eGFR) and the age-dependent eGFR decline reported for healthy living potential kidney donors. METHODS We examined the association between death or cardiovascular event and KCD score, age-dependent stepped eGFR criteria (eGFRstep), and eGFR < 60 ml/min/1.73 m2 (eGFR60) in a community-based high cardiovascular risk cohort of 3837 individuals aged ≥60 (median 70, interquartile range 65, 75) years, followed for a median of 5.6 years. RESULTS In proportional hazards analysis, KCD score ≥ 20 years (KCD20) was associated with increased risk of death or cardiovascular event in unadjusted analysis and after adjustment for age, sex and cardiovascular risk factors. Addition of KCD20, eGFRstep or eGFR60 to a cardiovascular risk factor model did not improve area under the curve for identification of individuals who experienced death or cardiovascular event in receiver operating characteristic curve analysis. However, addition of KCD20 or eGFR60, but not eGFRstep, to a cardiovascular risk factor model improved net reclassification and integrated discrimination. KCD20 identified individuals who experienced death or cardiovascular event with greater sensitivity than eGFRstep for all participants, and with greater sensitivity than eGFR60 for participants aged 60-69 years, with similar sensitivities for men and women. CONCLUSIONS In this high cardiovascular risk cohort aged ≥60 years, the KCD score provided an age-adapted measure of kidney function that may assist patient education, and KCD20 provided an age-adapted criterion of eGFR-related increased risk of death or cardiovascular event. Further studies that include the full age spectrum are required to examine the optimal KCD score cut point that identifies increased risk of death or cardiovascular event, and kidney events, associated with impaired kidney function, and whether the optimal KCD score cut point is similar for men and women. TRIAL REGISTRATION ClinicalTrials.gov NCT00400257 , NCT00604006 , and NCT01581827 .
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Affiliation(s)
- Duncan J Campbell
- St. Vincent's Institute of Medical Research, 41 Victoria Parade, Fitzroy, Victoria, 3065, Australia.
- University of Melbourne, Parkville, Victoria, Australia.
- St. Vincent's Hospital, Melbourne, Victoria, Australia.
| | | | - Fei Fei Gong
- St. Vincent's Institute of Medical Research, 41 Victoria Parade, Fitzroy, Victoria, 3065, Australia
- University of Melbourne, Parkville, Victoria, Australia
- St. Vincent's Hospital, Melbourne, Victoria, Australia
| | - Michele McGrady
- Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Umberto Boffa
- School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - Louise Shiel
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Danny Liew
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Simon Stewart
- Torrens University Australia, Adelaide, South Australia, Australia
| | - Alice J Owen
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Henry Krum
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
| | - Christopher M Reid
- Public Health and Preventive Medicine, Monash University, Prahran, Victoria, Australia
- School of Public Health, Curtin University, Bentley, Western Australia, Australia
| | - David L Prior
- University of Melbourne, Parkville, Victoria, Australia
- St. Vincent's Hospital, Melbourne, Victoria, Australia
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152
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Huart J, Bouquegneau A, Lutteri L, Erpicum P, Grosch S, Résimont G, Wiesen P, Bovy C, Krzesinski JM, Thys M, Lambermont B, Misset B, Pottel H, Mariat C, Cavalier E, Burtey S, Jouret F, Delanaye P. Proteinuria in COVID-19: prevalence, characterization and prognostic role. J Nephrol 2021; 34:355-364. [PMID: 33484426 PMCID: PMC7823174 DOI: 10.1007/s40620-020-00931-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 11/18/2020] [Indexed: 12/30/2022]
Abstract
BACKGROUND Proteinuria has been commonly reported in patients with COVID-19. However, only dipstick tests have been frequently used thus far. Here, the quantification and characterization of proteinuria were investigated and their association with mortality was assessed. METHODS This retrospective, observational, single center study included 153 patients, hospitalized with COVID-19 between March 28th and April 30th, 2020, in whom total proteinuria and urinary α1-microglobulin (a marker of tubular injury) were measured. Association with mortality was evaluated, with a follow-up until May 7th, 2020. RESULTS According to the Kidney Disease Improving Global Outcomes staging, 14% (n = 21) of the patients had category 1 proteinuria (< 150 mg/g of urine creatinine), 42% (n = 64) had category 2 (between 150 and 500 mg/g) and 44% (n = 68) had category 3 proteinuria (over 500 mg/g). Urine α1-microglobulin concentration was higher than 15 mg/g in 89% of patients. After a median follow-up of 27 [14;30] days, the mortality rate reached 18%. Total proteinuria and urinary α1-microglobulin were associated with mortality in unadjusted and adjusted models. This association was stronger in subgroups of patients with normal renal function and without a urinary catheter. CONCLUSIONS Proteinuria is frequent in patients with COVID-19. Its characterization suggests a tubular origin, with increased urinary α1-microglobulin. Tubular proteinuria was associated with mortality in COVID-19 in our restropective, observational study.
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Affiliation(s)
- Justine Huart
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
- Groupe Interdisciplinaire de Géno-protéomique Appliquée, Cardiovascular Sciences, University of Liège, Liège, Belgium
| | - Antoine Bouquegneau
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
| | - Laurence Lutteri
- Department of Clinical Chemistry, CHU Sart Tilman, University of Liège (CHU ULiege), Liège, Belgium
| | - Pauline Erpicum
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
- Groupe Interdisciplinaire de Géno-protéomique Appliquée, Cardiovascular Sciences, University of Liège, Liège, Belgium
| | - Stéphanie Grosch
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
| | - Guillaume Résimont
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
| | - Patricia Wiesen
- Department of Intensive Care, CHU Sart Tilman, University of Liège (CHU ULiege), Liège, Belgium
| | - Christophe Bovy
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
| | - Jean-Marie Krzesinski
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
- Groupe Interdisciplinaire de Géno-protéomique Appliquée, Cardiovascular Sciences, University of Liège, Liège, Belgium
| | - Marie Thys
- Department of Medico-Economic Information, CHU Sart Tilman, University of Liège (CHU ULiege), Liège, Belgium
| | - Bernard Lambermont
- Department of Intensive Care, CHU Sart Tilman, University of Liège (CHU ULiege), Liège, Belgium
| | - Benoît Misset
- Department of Intensive Care, CHU Sart Tilman, University of Liège (CHU ULiege), Liège, Belgium
| | - Hans Pottel
- Department of Public Health and Primary Care, KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium
| | - Christophe Mariat
- Nephrology, Dialysis and Renal Transplantation Department, Hôpital Nord, CHU de Saint-Etienne, Jean Monnet University, COMUE Université de Lyon, Lyon, France
| | - Etienne Cavalier
- Department of Clinical Chemistry, CHU Sart Tilman, University of Liège (CHU ULiege), Liège, Belgium
| | - Stéphane Burtey
- Center of Nephrology and Renal Transplantation, Public Assistance of the Hospitals of Marseille, Marseille, France
- Aix-Marseille University, INSERM, INRA, C2VN, Marseille, France
| | - François Jouret
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium
- Groupe Interdisciplinaire de Géno-protéomique Appliquée, Cardiovascular Sciences, University of Liège, Liège, Belgium
| | - Pierre Delanaye
- Department of Nephrology-Dialysis-Transplantation, Service de Dialyse, CHU Sart Tilman, University of Liège (CHU ULiege), 4000, Liège, Belgium.
- Department of Nephrology-Dialysis-Apheresis, Hopital Universitaire Caremeau, Nimes, France.
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153
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Chou YH, Chen YM. Aging and Renal Disease: Old Questions for New Challenges. Aging Dis 2021; 12:515-528. [PMID: 33815880 PMCID: PMC7990354 DOI: 10.14336/ad.2020.0703] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 07/03/2020] [Indexed: 12/15/2022] Open
Abstract
Chronic kidney disease (CKD) is a growing problem among aging population, and the number of individuals at risk of end stage renal disease is rising. Part of the reason lies in incomplete understanding of the pathways underlying renal aging and kidney disease, as well as insufficient delivery of evidence-based treatment to elderly patients with CKD. This review aims to address these unsolved issues by delineating updated mechanisms of renal senescence and summarizing recent findings on key clinical aspects of CKD in the elderly. Challenges and obstacles in caring for older people with CKD are discussed, with an emphasis on modification of risk factors, prevention of acute kidney injury, stabilization of progression and decision on dialysis initiation.
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Affiliation(s)
- Yu-Hsiang Chou
- 1Department of Internal Medicine, National Taiwan University Hospital Jin-Shan Branch, New Taipei City 20844, Taiwan.,2Renal Division, Department of Internal Medicine, and
| | - Yung-Ming Chen
- 2Renal Division, Department of Internal Medicine, and.,3Department of Geriatrics and Gerontology, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taiwan
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154
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Björk J, Nyman U, Larsson A, Delanaye P, Pottel H. Estimation of the glomerular filtration rate in children and young adults by means of the CKD-EPI equation with age-adjusted creatinine values. Kidney Int 2021; 99:940-947. [DOI: 10.1016/j.kint.2020.10.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/24/2020] [Accepted: 10/11/2020] [Indexed: 10/23/2022]
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155
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Elderly Patients in a Large Nephrology Unit: Who Are Our Old, Old-Old and Oldest-Old Patients? J Clin Med 2021; 10:jcm10061168. [PMID: 33799519 PMCID: PMC8000250 DOI: 10.3390/jcm10061168] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/04/2021] [Accepted: 03/07/2021] [Indexed: 12/14/2022] Open
Abstract
The world population is aging, and the prevalence of chronic kidney disease (CKD) is increasing. Whether this increase is also due to the methods currently being used to assess kidney function in the elderly is still a matter of discussion. We aimed to describe the actual referral pattern of CKD patients in a large nephrology unit and test whether the use of different formulae to estimate kidney function could affect the staging and the need for specialist care in the older subset of our population. In 2019, 1992 patients were referred to our center. Almost 28% of the patients were aged ≥80 and about 6% were ≥90 years old. Among the causes of kidney disease, glomerulonephritis displayed a higher prevalence in younger patients whereas hypertensive or diabetic kidney disease were more prevalent in older patients. The prevalence of referred patients in advanced CKD stages increased with age; estimated glomerular filtration rate (eGFR) decreased with age regardless of which equation was used (chronic kidney disease epidemiology collaboration (CKD-EPI), Lund–Malmö Revised (LMR), modification of diet in renal disease (MDRD), Full Age Spectrum (FAS), or Berlin Initiative Study 1 (BIS)). With CKD-EPI as a reference, MDRD and FAS underestimated the CKD stage while LMR overestimated it. The BIS showed the highest heterogeneity. Considering an eGFR threshold limit of 45 mL/min for defining “significant” CKD in patients over 65 years of age, the variability in CKD staging was 10% no matter which equation was used. Our study quantified the weight of “old” and “old-old” patients on follow-up in a large nephrology outpatient unit and suggested that with the current referral pattern, the type of formula used does not affect the need for CKD care within the context of a relatively late referral, particularly in elderly patients.
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156
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Yue L, Fan L, Du X. Age- and Sex-Specific Reference Values of Estimated Glomerular Filtration Rate in Chinese Population. Gerontology 2021; 67:397-402. [PMID: 33601388 DOI: 10.1159/000513451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 11/28/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Due to an aging population, prevalence and mortality of CKD continue to increase. Current CKD definition has been challenged recently. Age- and sex-specific reference values of estimated glomerular filtration rate (eGFR) in China are still lacking. METHODS Age- and sex-stratified, randomly selected inhabitants received a health examination and an inquest into medical history. The GFR was estimated using CKD-EPI equation. We calculated means with ±1.96 times of standard deviation and 2.5th, 97.5th percentiles of eGFR per 5-year age-group. Some of their GFRs were measured by the Gates method (99mTc-DTPA renal scintigraphy) and estimated by cystatin C-based equation. RESULTS The cohort study included 17,037 male and 9,304 female Chinese persons aged 18-99 years. A reference population of apparently healthy subjects was selected by excluding persons with known hypertension, diabetes, cardiovascular, or renal diseases. This healthy cohort study included 12,231 male subjects and 6,463 female subjects. The mean eGFR was higher in the female than that in the male who were younger than 40-year (122 mL/min/1.73 m2 vs. 111 mL/min/1.73 m2). In these apparently healthy persons, GFR declined approximately 0.8 mL/min/year. The lower limit of eGFR (2.5th percentile or mean minus 1.96 times of standard deviation) was <60 or 45 mL/min/1.73 m2 at the age of ≥40 or 65 years old, respectively. CONCLUSION The mean eGFR was higher in young females. GFR declined approximately 0.8 mL/min/year. The lower bound of eGFR was <60 mL/min/1.73 m2 or 45 mL/min/1.73 m2 at the age of ≥40 or ≥65 years, respectively. Our study provides age- and sex-specific reference values of GFR in a Chinese population.
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Affiliation(s)
- Lili Yue
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Li Fan
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China
| | - Xin Du
- Department of Nephrology, Nanjing First Hospital, Nanjing Medical University, Nanjing, China,
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157
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Pottel H, Björk J, Courbebaisse M, Couzi L, Ebert N, Eriksen BO, Dalton RN, Dubourg L, Gaillard F, Garrouste C, Grubb A, Jacquemont L, Hansson M, Kamar N, Lamb EJ, Legendre C, Littmann K, Mariat C, Melsom T, Rostaing L, Rule AD, Schaeffner E, Sundin PO, Turner S, Bökenkamp A, Berg U, Åsling-Monemi K, Selistre L, Åkesson A, Larsson A, Nyman U, Delanaye P. Development and Validation of a Modified Full Age Spectrum Creatinine-Based Equation to Estimate Glomerular Filtration Rate : A Cross-sectional Analysis of Pooled Data. Ann Intern Med 2021; 174:183-191. [PMID: 33166224 DOI: 10.7326/m20-4366] [Citation(s) in RCA: 160] [Impact Index Per Article: 53.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND The Chronic Kidney Disease in Children Study (CKiD) equation for children and the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation for adults are recommended serum creatinine (SCr)-based calculations for estimating glomerular filtration rate (GFR). However, these equations, as well as their combination, have limitations, notably the problem of implausible changes in GFR during the transition from adolescence to adulthood and overestimation of GFR in young adults. The full age spectrum (FAS) equation addresses these issues but overestimates GFR when SCr levels are low. OBJECTIVE To develop and validate a modified FAS SCr-based equation combining design features of the FAS and CKD-EPI equations. DESIGN Cross-sectional analysis with separate pooled data sets for development and validation. SETTING Research and clinical studies (n = 13) with measured GFR available. PATIENTS 11 251 participants in 7 studies (development and internal validation data sets) and 8378 participants in 6 studies (external validation data set). MEASUREMENTS Clearance of an exogenous marker (reference method), SCr level, age, sex, and height were used to develop a new equation to estimate GFR. RESULTS The new European Kidney Function Consortium (EKFC) equation is a FAS equation with low bias (-1.2 mL/min/1.73 m2 [95% CI, -2.7 to 0.0 mL/min/1.73 m2] in children and -0.9 mL/min/1.73 m2 [CI, -1.2 to -0.5 mL/min/1.73 m2] in adults) across the FAS (2 to 90 years) and SCr range (40 to 490 µmol/L [0.45 to 5.54 mg/dL]) and with fewer estimation errors exceeding 30% (6.5% [CI, 3.8% to 9.1%] in children and 3.1% [CI, 2.5% to 3.6%] in adults) compared with the CKiD and CKD-EPI equations. LIMITATION No Black patients were included. CONCLUSION The new EKFC equation shows improved accuracy and precision compared with commonly used equations for estimating GFR from SCr levels. PRIMARY FUNDING SOURCE Swedish Research Council (Vetenskapsrådet).
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Affiliation(s)
- Hans Pottel
- KU Leuven Campus Kulak Kortrijk, Kortrijk, Belgium (H.P.)
| | - Jonas Björk
- Lund University and Skåne University Hospital, Lund, Sweden (J.B., A.Å.)
| | - Marie Courbebaisse
- Georges Pompidou European Hospital, Assistance Publique Hôpitaux de Paris (AP-HP), Paris Descartes University, INSERM U1151-CNRS UMR8253, Paris, France (M.C.)
| | - Lionel Couzi
- CHU de Bordeaux, Université de Bordeaux, CNRS-UMR 5164 Immuno ConcEpT, Bordeaux, France (L.C.)
| | - Natalie Ebert
- Charité Universitätsmedizin Berlin, Institute of Public Health, Berlin, Germany (N.E., E.S.)
| | - Björn O Eriksen
- UiT The Arctic University of Norway, Tromsö, Norway (B.O.E., T.M.)
| | - R Neil Dalton
- Evelina London Children's Hospital, London, United Kingdom (R.N.D.)
| | - Laurence Dubourg
- Hôpital Edouard Herriot, Hospices Civils de Lyon, Lyon, France (L.D.)
| | | | - Cyril Garrouste
- Clermont-Ferrand University Hospital, Clermont-Ferrand, France (C.G.)
| | - Anders Grubb
- Skåne University Hospital and Lund University, Lund, Sweden (A.G.)
| | | | - Magnus Hansson
- Karolinska University Hospital Huddinge and Karolinska Institute, Stockholm, Sweden (M.H.)
| | - Nassim Kamar
- CHU Rangueil, INSERM U1043, IFR-BMT, University Paul Sabatier, Toulouse, France (N.K.)
| | - Edmund J Lamb
- East Kent Hospitals University NHS Foundation Trust, Canterbury, United Kingdom (E.J.L.)
| | - Christophe Legendre
- Hôpital Necker, Assistance Publique Hôpitaux de Paris (AP-HP)and Université Paris Descartes, Paris, France (C.L.)
| | | | | | - Toralf Melsom
- UiT The Arctic University of Norway, Tromsö, Norway (B.O.E., T.M.)
| | - Lionel Rostaing
- Hôpital Michallon, CHU Grenoble-Alpes, La Tronche, France (L.R.)
| | | | - Elke Schaeffner
- Charité Universitätsmedizin Berlin, Institute of Public Health, Berlin, Germany (N.E., E.S.)
| | | | | | - Arend Bökenkamp
- Emma Children's Hospital, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands (A.B.)
| | - Ulla Berg
- Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden (U.B., K.Å.)
| | - Kajsa Åsling-Monemi
- Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden (U.B., K.Å.)
| | - Luciano Selistre
- Mestrado em Ciências da Saúde-Universidade Caxias do Sul Foundation CAPES, Caxias do Sul, Brazil (L.S.)
| | - Anna Åkesson
- Lund University and Skåne University Hospital, Lund, Sweden (J.B., A.Å.)
| | - Anders Larsson
- Skåne University Hospital, Lund, Sweden; Uppsala University, Uppsala, Sweden (A.L.)
| | - Ulf Nyman
- Lund University, Malmö, Sweden (U.N.)
| | - Pierre Delanaye
- University of Liège (ULg CHU), CHU Sart Tilman, Liège, Belgium, and Hôpital Universitaire Carémeau, Nîmes, France (P.D.)
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158
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Desbiens LC, Goupil R, Madore F, Mac-Way F. Incidence of fractures in middle-aged individuals with early chronic kidney disease: a population-based analysis of CARTaGENE. Nephrol Dial Transplant 2021; 35:1712-1721. [PMID: 31951261 DOI: 10.1093/ndt/gfz259] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 11/06/2019] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Previous studies evaluating fractures in chronic kidney disease (CKD) have mostly focused on hip or major fractures in aged populations with moderate to advanced CKD. We aimed at evaluating the association between early CKD and fracture incidence at all sites across age and sex in middle-aged individuals. METHODS We analyzed CARTaGENE, a prospective population-based survey of 40- to 69-year-old individuals from Quebec (Canada). Estimated glomerular filtration rate (eGFR) at baseline was evaluated categorically or continuously using restricted cubic splines. Fractures at any site (except toes, hand and craniofacial) for up to 7 years of follow-up were identified through administrative databases using a validated algorithm. Adjusted Cox models were used to evaluate the association of CKD with fracture. Interaction terms for age and sex were also added. RESULTS A total of 19 391 individuals (756 CKD Stage 3; 9114 Stage 2; 9521 non-CKD) were included and 829 fractures occurred during a median follow-up of 70 months. Compared with the median eGFR of 90 mL/min/1.73 m2, eGFRs of ≤60 mL/min/1.73 m2 were associated with increased fracture incidence in unadjusted and adjusted models [adjusted hazard ratio (HR) = 1.25 (95% confidence interval 1.05-1.49) for 60 mL/min/1.73 m2; 1.65 (1.14-2.37) for 45 mL/min/1.73 m2]. The eGFR was linearly associated with fracture incidence <75 mL/min/1.73 m2 [HR = 1.18 (1.04-1.34) per 10 mL/min/1.73 m2 decrease] but not above [HR = 0.98 (0.91-1.06) per 10 mL/min/1.73 m2 decrease). The effect of decreased eGFR on fracture incidence was more pronounced in younger individuals [HR = 2.45 (1.28-4.67) at 45 years; 1.11 (0.73-1.67) at 65 years] and in men. CONCLUSIONS Even early CKD increases fracture incidence, especially in younger individuals and in men.
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Affiliation(s)
- Louis-Charles Desbiens
- Faculty and Department of Medicine, Endocrinology and Nephrology Axis, CHU de Québec-Université Laval, Quebec City, QC, Canada
| | - Rémi Goupil
- Hôpital du Sacré-Coeur de Montréal, Faculty and Department of Medicine, Université de Montréal, Montreal, QC, Canada
| | - François Madore
- Hôpital du Sacré-Coeur de Montréal, Faculty and Department of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Fabrice Mac-Way
- Faculty and Department of Medicine, Endocrinology and Nephrology Axis, CHU de Québec-Université Laval, Quebec City, QC, Canada
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159
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Buchkremer F, Segerer S. Estimating glomerular filtration rate: a systematic comparison of the new European Kidney Function Consortium equation with the Chronic Kidney Disease Epidemiology Collaboration equation. Clin Kidney J 2021; 14:448-450. [PMID: 33564455 PMCID: PMC7857821 DOI: 10.1093/ckj/sfaa264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 11/20/2020] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Stephan Segerer
- Division of Nephrology, Kantonsspital Aarau, Aarau, Switzerland
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160
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Lin TY, Hung SC, Yeh CT, Lin CY, Peng CH, Wang YC. Aging is associated with slower renal progression in patients with chronic kidney disease. Tzu Chi Med J 2021; 34:214-218. [PMID: 35465289 PMCID: PMC9020239 DOI: 10.4103/tcmj.tcmj_102_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 06/07/2021] [Accepted: 06/22/2021] [Indexed: 11/08/2022] Open
Abstract
Objectives: Chronic kidney disease (CKD) is prevalent among the elderly. However, little is known about how the clinical course of CKD vary with age. The purpose of this study was to examine the impact of aging on the risk of end-stage kidney disease (ESKD) in patients with moderate to advanced CKD. Materials and Methods: A total of 454 patients with stages 3–5 CKD were prospectively followed for a median of 5.1 years. The primary outcome was ESKD needing chronic dialysis therapy or preemptive kidney transplantation. The secondary outcome was a composite of ESKD or all-cause mortality. Results: The mean age of the patients was 65 ± 13 years. 65.4% were men, 44.9% had diabetes mellitus, and 22.7% had cardiovascular disease. Overall, 142 participants progressed to ESKD and 63 participants died. Compared with young patients (age <65 years, n = 205), elderly patients (age ≥65 years, n = 249) were associated with a significantly decreased risk of ESKD in Cox proportional hazards models adjusted for sex, smoking history, diabetes mellitus, cardiovascular disease, systolic blood pressure, estimated glomerular filtration rate, urine protein: Creatinine ratio, use of renin-angiotensin-aldosterone blocker, hemoglobin, phosphate, interleukin-6, body mass index, and N-terminal pro-brain natriuretic peptide (hazard ratio [HR]: 0.66; 95% confidence interval [CI]: 0.45, 0.96; P = 0.028). The results remained statistically significant when death as a competing risk was taken into account (subdistribution HR: 0.65; 95% CI: 0.45, 0.95, P = 0.026). Notably, elderly did not predict a higher risk for the composite outcome (HR: 0.94; 95% CI: 0.67, 1.32; P = 0.723). Conclusion: Elderly confers a decreased risk of ESKD in Taiwanese patients with moderate to advanced CKD. Our findings suggest that age is an important effect modifier for CKD progression.
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161
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Shlipak MG, Tummalapalli SL, Boulware LE, Grams ME, Ix JH, Jha V, Kengne AP, Madero M, Mihaylova B, Tangri N, Cheung M, Jadoul M, Winkelmayer WC, Zoungas S. The case for early identification and intervention of chronic kidney disease: conclusions from a Kidney Disease: Improving Global Outcomes (KDIGO) Controversies Conference. Kidney Int 2021; 99:34-47. [PMID: 33127436 DOI: 10.1016/j.kint.2020.10.012] [Citation(s) in RCA: 212] [Impact Index Per Article: 70.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 10/05/2020] [Accepted: 10/13/2020] [Indexed: 02/06/2023]
Abstract
Chronic kidney disease (CKD) causes substantial global morbidity and increases cardiovascular and all-cause mortality. Unlike other chronic diseases with established strategies for screening, there has been no consensus on whether health systems and governments should prioritize early identification and intervention for CKD. Guidelines on evaluating and managing early CKD are available but have not been universally adopted in the absence of incentives or quality measures for prioritizing CKD care. The burden of CKD falls disproportionately upon persons with lower socioeconomic status, who have a higher prevalence of CKD, limited access to treatment, and poorer outcomes. Therefore, identifying and treating CKD at the earliest stages is an equity imperative. In 2019, Kidney Disease: Improving Global Outcomes (KDIGO) held a controversies conference entitled "Early Identification and Intervention in CKD." Participants identified strategies for screening, risk stratification, and treatment for early CKD and the key health system and economic factors for implementing these processes. A consensus emerged that CKD screening coupled with risk stratification and treatment should be implemented immediately for high-risk persons and that this should ideally occur in primary or community care settings with tailoring to the local context.
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Affiliation(s)
- Michael G Shlipak
- Kidney Health Research Collaborative, Department of Medicine, University of California San Francisco, San Francisco, California, USA; General Internal Medicine Division, Medical Service, San Francisco Veterans Affairs Health Care System, San Francisco, California, USA.
| | - Sri Lekha Tummalapalli
- Kidney Health Research Collaborative, Department of Medicine, University of California San Francisco, San Francisco, California, USA; General Internal Medicine Division, Medical Service, San Francisco Veterans Affairs Health Care System, San Francisco, California, USA
| | - L Ebony Boulware
- Department of General Internal Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Morgan E Grams
- Division of Nephrology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | - Joachim H Ix
- Division of Nephrology-Hypertension, Department of Medicine, University of California San Diego, San Diego, California, USA; Nephrology Section, Veterans Affairs San Diego Healthcare System, La Jolla, California, USA; Division of Preventive Medicine, Department of Family Medicine and Public Health, University of California San Diego, San Diego, California, USA
| | - Vivekanand Jha
- George Institute for Global Health, University of New South Wales, New Delhi, India; University of Oxford, Oxford, UK; Department of Nephrology, Manipal Academy of Higher Education, Manipal, India
| | - Andre-Pascal Kengne
- Non-Communicable Diseases Research Unit, South African Medical Research Council, Cape Town, South Africa; Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Magdalena Madero
- Department of Medicine, Division of Nephrology, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Borislava Mihaylova
- Health Economics Research Centre, Nuffield Department of Population Health, University of Oxford, Oxford, UK; Institute of Population Health Sciences, Blizard Institute, Queen Mary University of London, London, UK
| | - Navdeep Tangri
- Department of Community Health Services, Max Rady College of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Michael Cheung
- Kidney Disease: Improving Global Outcomes, Brussels, Belgium
| | - Michel Jadoul
- Cliniques Universitaires Saint Luc, Université Catholique de Louvain, Brussels, Belgium
| | - Wolfgang C Winkelmayer
- Selzman Institute for Kidney Health, Section of Nephrology, Department of Medicine, Baylor College of Medicine, Houston, Texas, USA
| | - Sophia Zoungas
- Diabetes and Vascular Medicine Unit, Monash Health, Clayton, Victoria, Australia; School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.
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162
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Zhang J, Thio CHL, Gansevoort RT, Snieder H. Familial Aggregation of CKD and Heritability of Kidney Biomarkers in the General Population: The Lifelines Cohort Study. Am J Kidney Dis 2020; 77:869-878. [PMID: 33359149 DOI: 10.1053/j.ajkd.2020.11.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 11/06/2020] [Indexed: 01/08/2023]
Abstract
RATIONALE & OBJECTIVE Chronic kidney disease (CKD) has a heritable component. We aimed to quantify familial aggregation of CKD in the general population and assess the extent to which kidney traits could be explained by genetic and environmental factors. STUDY DESIGN Cross-sectional 3-generation family study. SETTING & PARTICIPANTS Data were collected at entry into the Lifelines Cohort Study from a sample of the general population of the northern Netherlands, composed predominantly of individuals of European ancestry. EXPOSURE Family history of CKD. OUTCOMES The primary outcome was CKD, defined as estimated glomerular filtration rate (eGFR)<60mL/min/1.73m2, where GFR was estimated using the CKD Epidemiology Collaboration creatinine equation. Among a subsample for which urinary albumin concentration was available (n=59,943), urinary albumin excretion was expressed as the rate of urinary albumin excretion (UAE) per 24 hours or urinary albumin-creatinine ratio (UACR). ANALYTICAL APPROACH Familial aggregation of CKD was assessed by calculating the recurrence risk ratio (RRR), using adapted Cox proportional hazards models. Heritability of continuous kidney-related traits was estimated using linear mixed models and defined as the ratio of the additive genetic variance to total phenotypic variance. All models were adjusted for age, sex, and known risk factors for kidney disease. RESULTS Among 155,911 participants with available eGFR data, the prevalence of CKD was 1.19% (1,862 cases per 155,911). The risk of CKD in those with an affected first-degree relative was 3 timeshigher than the risk in the total sample (RRR, 3.04 [95% CI, 2.26-4.09). In those with an affected spouse, risk of CKD was also higher (RRR, 1.56 [95% CI, 1.20-1.96]), indicative of shared environmental factors and/or assortative mating. Heritability estimates of eGFR, UAE, and UACR were 44%, 20%, and 18%, respectively. For serum urea, creatinine, and uric acid, estimates were 31%, 37%, and 48%, respectively, whereas estimates for serum electrolytes ranged from 22% to 28%. LIMITATIONS Use of estimated rather than measured GFR. UAE data only available in a subsample. CONCLUSIONS In this large population-based family study, a positive family history was strongly associated with increased risk of CKD. We observed moderate to high heritability of kidney traits and related biomarkers. These results indicate an important role of genetic factors in CKD risk.
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Affiliation(s)
- Jia Zhang
- Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands; Shenzhen Center for Chronic Disease Control, Shenzhen, Guangdong, China; Department of Epidemiology and Statistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, and School of Basic Medicine, Peking Union, Medical College, Beijing, China
| | - Chris H L Thio
- Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Ron T Gansevoort
- Division of Nephrology, Department of Internal Medicine, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Harold Snieder
- Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
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163
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Anders HJ, Peired AJ, Romagnani P. SGLT2 inhibition requires reconsideration of fundamental paradigms in chronic kidney disease, 'diabetic nephropathy', IgA nephropathy and podocytopathies with FSGS lesions. Nephrol Dial Transplant 2020; 37:1609-1615. [PMID: 33313878 DOI: 10.1093/ndt/gfaa329] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Indexed: 12/11/2022] Open
Abstract
In 2020, the Dapagliflozin and Prevention of Adverse Outcomes in Chronic Kidney Disease (DAPA-CKD) trial first demonstrated that inhibition of the sodium-glucose transporter-2 (SGLT2) with dapagliflozin attenuates the progression of chronic kidney disease (CKD) with proteinuria in patients with or without diabetes at an unprecedented effect size. These results have far-reaching implications for a series of traditional concepts in Nephrology. It now became obvious that CKD with and without diabetes involves a predominant SGLT2-driven pathophysiology compared with the other pathogenic pathways currently under consideration. As SGLT2 inhibition is similarly efficacious in diabetic and non-diabetic CKD with proteinuria, treating CKD rather than 'diabetic nephropathy' becomes the central paradigm. Indeed, in older adults with type 2 diabetes, CKD is rather of multifactorial origin. As the DAPA-CKD trial included more patients with immunoglobulin A nephropathy (IgAN) than any of the previous IgAN trials, dual renin-angiotensin/SGLT2 inhibition may become the new standard. The same applies for patients with podocytopathy-related focal segmental glomerulosclerosis lesions. From now on, IgAN and podocytopathy trials without SGLT2 inhibition as background therapy and without glomerular filtration rate decline as primary outcome criterion will be of limited value. These and other potential implications will trigger broad discussions and secondary research activities with conclusions difficult to predict today. However, one is for sure: Nephrology after the DAPA-CKD trial will be not the same as it was before. Finally!
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Affiliation(s)
- Hans-Joachim Anders
- Division of Nephrology, Medizinische Klinik und Poliklinik IV, LMU Klinikum, Munich, Germany
| | - Anna Julie Peired
- Excellence Centre for Research, Transfer and High Education for the Development of DE NOVO Therapies (DENOTHE), University of Florence, Florence, Italy.,Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence and Nephrology Unit, Florence, Italy
| | - Paola Romagnani
- Department of Clinical and Experimental Biomedical Sciences "Mario Serio", University of Florence and Nephrology Unit, Florence, Italy.,Nephrology Unit, Anna Meyer Children's Hospital, Florence, Italy
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164
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Age-adapted definition of chronic kidney disease based on Chronic Kidney Disease Epidemiology Collaboration and full age spectrum equation. Kidney Int 2020; 98:1350-1352. [PMID: 33126983 DOI: 10.1016/j.kint.2020.08.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/13/2020] [Accepted: 08/19/2020] [Indexed: 11/22/2022]
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165
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Kühn A, van der Giet M, Kuhlmann MK, Martus P, Mielke N, Ebert N, Schaeffner ES. Kidney Function as Risk Factor and Predictor of Cardiovascular Outcomes and Mortality Among Older Adults. Am J Kidney Dis 2020; 77:386-396.e1. [PMID: 33197533 DOI: 10.1053/j.ajkd.2020.09.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 09/17/2020] [Indexed: 01/29/2023]
Abstract
RATIONALE & OBJECTIVE Estimated glomerular filtration rate (eGFR) and urinary albumin-creatinine ratio (UACR) are associated with cardiovascular events in the general population but their utility among older adults is unclear. We investigated the associations of eGFR and UACR with stroke, myocardial infarction (MI), and death among older adults. STUDY DESIGN Population-based cohort study. SETTING & PARTICIPANTS 1,581 participants (aged≥70 years) in the Berlin Initiative Study (BIS) without prior stroke or MI. EXPOSURES & PREDICTORS Serum creatinine- and cystatin C-based eGFR, UACR categories, and measured GFR (n=436). OUTCOMES Stroke, MI, and all-cause mortality. ANALYTICAL APPROACH HRs and 95% CIs derived from multivariable-adjusted Cox proportional hazards models for association analyses. Net reclassification improvement (NRI) and C statistic differences comparing the predictive benefit of kidney measures with a traditional cardiovascular risk model. RESULTS During a median follow-up of 8.2 years, 193 strokes, 125 MIs, and 531 deaths occurred. Independent of UACR, when GFR was estimated using the creatinine- and cystatin C-based BIS equation, eGFR of 45 to 59mL/min/1.73m2 (vs eGFR>60mL/min/1.73m2) was associated with stroke (HR, 2.23; 95% CI, 1.55-3.21) but not MI or all-cause mortality. For those with eGFR<45mL/min/1.73m2, the HRs were 1.99 (95% CI, 1.23-3.20) for stroke, 1.38 (95% CI, 0.81-2.36) for MI, and 1.57 (95% CI, 1.20-2.06) for mortality. Compared with UACR<30mg/g, UACR of 30 to 300mg/g was not associated with stroke (HR, 0.91; 95% CI, 0.63-1.33) but was associated with MI (HR, 1.65; 95% CI, 1.09-2.51) and all-cause mortality (HR, 1.63; 95% CI, 1.34-1.98). Prediction analysis for stroke showed significant positive NRI for eGFR calculated using the cystatin C-based Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation and the creatinine- and cystatin C-based BIS and Full Age Spectrum equations. UACR demonstrated significant positive NRIs for MI and mortality. LIMITATIONS eGFR and UACR categorization based on single assessments; lack of cause-specific death data. CONCLUSIONS eGFR of 45 to 59mL/min/1.73m2 without albuminuria was associated with stroke but not MI or all-cause mortality in older adults. In contrast, UACR of 30 to 300mg/g was associated with MI and all-cause mortality but not with stroke. Furthermore, cystatin C-based eGFR improved risk prediction for stroke in this cohort of older adults.
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Affiliation(s)
- Andreas Kühn
- Institut für Public Health, Charité - Universitätsmedizin Berlin, Berlin, Germany.
| | - Markus van der Giet
- Med. Klinik mit SP Nephrologie und Internistische Intensivmedizin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Martin K Kuhlmann
- Innere Medizin - Nephrologie, Vivantes Klinikum im Friedrichshain, Berlin, Germany
| | - Peter Martus
- Institut für Klinische Epidemiologie und angewandte Biometrie, Universitätsklinikum Tübingen, Tübingen, Germany
| | - Nina Mielke
- Institut für Public Health, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Natalie Ebert
- Institut für Public Health, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Elke S Schaeffner
- Institut für Public Health, Charité - Universitätsmedizin Berlin, Berlin, Germany
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166
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De Broe M, Delanaye P. How to interpret an estimated glomerular filtration rate (eGFR) in 2020? Kidney Int 2020; 98:1090-1092. [PMID: 33126972 DOI: 10.1016/j.kint.2020.07.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 07/06/2020] [Indexed: 10/23/2022]
Abstract
Chronic kidney disease (CKD) is defined as abnormalities of kidney structure and function proven to be chronic. The prevalence of CKD in the majority of studies is 10%-16%, neglecting the chronicity character. Jonsson et al., in a nationwide study defining CKD adhering strictly to Kidney Disease: Improving Global Outcomes (KDIGO) criteria, found a clearly lower prevalence of CKD (6%). This indicated that to obtain a correct CKD prevalence, one should start by correctly applying the KDIGO guidelines.
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Affiliation(s)
- Marc De Broe
- Laboratory of Physiopathology, University of Antwerp, Antwerpen, Belgium.
| | - Pierre Delanaye
- Department of Nephrology-Dialysis-Transplantation, University of Liège, Centre Hospitalier Universitaire Sart Tilman, Liège, Belgium; Department of Nephrology-Dialysis-Apheresis, Hôpital Universitaire Caremeau, Nimes, France
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167
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Breath Ammonia Is a Useful Biomarker Predicting Kidney Function in Chronic Kidney Disease Patients. Biomedicines 2020; 8:biomedicines8110468. [PMID: 33142890 PMCID: PMC7692127 DOI: 10.3390/biomedicines8110468] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/27/2020] [Accepted: 10/27/2020] [Indexed: 12/28/2022] Open
Abstract
Chronic kidney disease (CKD) is a public health problem and its prevalence has increased worldwide; patients are commonly unaware of the condition. The present study aimed to investigate whether exhaled breath ammonia via vertical-channel organic semiconductor (V-OSC) sensor measurement could be used for rapid CKD screening. We enrolled 121 CKD stage 1–5 patients, including 19 stage 1 patients, 26 stage 2 patients, 38 stage 3 patients, 21 stage 4 patients, and 17 stage 5 patients, from July 2019 to January 2020. Demographic and laboratory data were recorded. The exhaled ammonia was collected and rapidly measured by the V-OSC sensor to correlate with kidney function. Results showed no significant difference in age, sex, body weight, hemoglobin, albumin level, and comorbidities in different CKD stage patients. Correlation analysis demonstrated a good correlation between breath ammonia and blood urea nitrogen levels, serum creatinine levels, and estimated glomerular filtration rate (eGFR). Breath ammonia concentration was significantly elevated with increased CKD stage compared with the previous stage (CKD stage 1/2/3/4/5: 636 ± 94; 1020 ± 120; 1943 ± 326; 4421 ± 1042; 12781 ± 1807 ppb, p < 0.05). The receiver operating characteristic curve analysis showed an area under the curve (AUC) of 0.835 (p < 0.0001) for distinguishing CKD stage 1 from other CKD stages at 974 ppb (sensitivity, 69%; specificity, 95%). The AUC was 0.831 (p < 0.0001) for distinguishing between patients with/without eGFR < 60 mL/min/1.73 m2 (cutoff 1187 ppb: sensitivity, 71%; specificity, 78%). At 886 ppb, the sensitivity increased to 80% but the specificity decreased to 69%. This value is suitable for kidney function screening. Breath ammonia detection with V-OSC is a real time, inexpensive, and easy to administer measurement device for screening CKD with reliable diagnostic accuracy.
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168
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Rubio-Aliaga I. Phosphate and Kidney Healthy Aging. Kidney Blood Press Res 2020; 45:802-811. [DOI: 10.1159/000509831] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Accepted: 06/29/2020] [Indexed: 11/19/2022] Open
Abstract
<b><i>Background:</i></b> The aging population is increasing rapidly, much faster than our understanding on how to promote healthy aging free of multimorbidities. The aging kidney shows a decline in its function. Whether this decline is preventable or physiological is still debated. Main risks factors for developing CKD are aging common comorbidites, such as hypertension, diabetes, and obesity. Phosphate is vital for our organism, but it is also present in a great variety of food products as food additive and preservative. Due to the higher consumption of processed food in the last century, concern has arisen if a chronic high consumption of phosphate may be toxic impacting on healthy aging. <b><i>Summary:</i></b> Several studies show an association between higher serum phosphate levels and a higher risk of overall mortality and cardiovascular disease. Moreover, higher phosphate levels also worsen CKD progression and may contribute to renal dysfunction in healthy individuals. Acute high phosphate intake is rare but can cause acute kidney injury. Yet, the question if controlling phosphate intake may modulate serum phosphate concentrations remains unanswered, as assessment of phosphate intake is still a difficult task. Phosphate consumption estimations by dietary recalls are largely underestimated, especially in populations groups consuming high amount of processed food. <b><i>Key Message:</i></b> A healthy diet with phosphate source from food may contribute to promote healthy aging and longevity.
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169
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Saunder T, Kitsos A, Radford J, Jose K, McKercher C, Raj R, Wiggins N, Stokes B, Jose MD. Chronic Kidney Disease in Tasmania: Protocol for a Data Linkage Study. JMIR Res Protoc 2020; 9:e20160. [PMID: 32940614 PMCID: PMC7530696 DOI: 10.2196/20160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/29/2020] [Accepted: 07/14/2020] [Indexed: 11/15/2022] Open
Abstract
Background Chronic kidney disease (CKD) is a significant and growing health burden globally. Tasmania has the highest state prevalence for non-Indigenous Australians and it has consistently had the lowest incidence and prevalence of dialysis in Australia. Objective To examine the gap between the high community prevalence of CKD in Tasmania and the low use of dialysis. Methods This is a retrospective cohort study using linked data from 5 health and 2 pathology data sets from the island state of Tasmania, Australia. The study population consists of any person (all ages including children) who had a blood measurement of creatinine with the included pathology providers between January 1, 2004, and December 31, 2017. This study population (N=460,737) includes within it a CKD cohort, which was detected via pathology or documentation of kidney replacement therapy (KRT; dialysis or kidney transplant). Kidney function (estimated glomerular filtration rate [eGFR]) was calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula. Individuals with 2 measures of eGFR<60 mL/min/1.73 m2, at least 90 days apart, were identified as having CKD and were included in the CKD cohort. Individuals treated with dialysis or transplant were identified from the Australia and New Zealand Dialysis and Transplant Registry. Results The study population consisted of 460,737 people (n=245,573 [53.30%] female, mean age 47.4 years) who were Tasmanian residents aged 18 years and older and were followed for a median of 7.8 years. During the later 5 years of the study period, 86.79% (355,622/409,729) of Tasmanian adults were represented. The CKD cohort consisted of 56,438 people (ie, 12.25% of the study population; 53.87% (30,405/56,438) female, mean age 69.9 years) followed for a median of 10.4 years with 56,039 detected via eGFR and 399 people detected via documentation of KRT. Approximately half (227,433/460,737, 49.36%) of the study population and the majority of the CKD cohort (41,448/56,438, 73.44%) had an admission episode. Of the 55,366 deaths recorded in the study population, 45.10% (24,970/55,366) had CKD. Conclusions Whole-of-population approaches to examine CKD in the community can be achieved by data linkage. Over this 14-year period, CKD affected 12.25% (56,438/460,737) of Tasmanian adult residents and was present in 45.10% (24,970/55,366) of deaths. International Registered Report Identifier (IRRID) DERR1-10.2196/20160
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Affiliation(s)
- Timothy Saunder
- School of Medicine, University of Tasmania, Hobart, Australia.,Axion Data, Hobart, Australia
| | - Alex Kitsos
- School of Medicine, University of Tasmania, Hobart, Australia.,Axion Data, Hobart, Australia
| | - Jan Radford
- School of Medicine, University of Tasmania, Launceston, Australia
| | - Kim Jose
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Charlotte McKercher
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Rajesh Raj
- School of Medicine, University of Tasmania, Launceston, Australia.,Renal Unit, Launceston General Hospital, Launceston, Australia
| | - Nadine Wiggins
- Tasmanian Data Linkage Unit, University of Tasmania, Hobart, Australia
| | - Brian Stokes
- Tasmanian Data Linkage Unit, University of Tasmania, Hobart, Australia
| | - Matthew D Jose
- School of Medicine, University of Tasmania, Hobart, Australia.,Renal Unit, Royal Hobart Hospital, Hobart, Australia.,Australia and New Zealand Dialysis and Transplant Registry (ANZDATA), Adelaide, Australia
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170
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Peer N, George J, Lombard C, Steyn K, Levitt N, Kengne AP. Prevalence, concordance and associations of chronic kidney disease by five estimators in South Africa. BMC Nephrol 2020; 21:372. [PMID: 32854641 PMCID: PMC7451105 DOI: 10.1186/s12882-020-02018-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 08/12/2020] [Indexed: 02/08/2023] Open
Abstract
Background To determine the prevalence, distribution, concordance and associations of chronic kidney disease (CKD) determined by five glomerular filtration rate (GFR) formulae in urban black residents of Cape Town. Methods Data collection in this cross-sectional study included interviews, clinical measurements and biochemical analyses, including serum creatinine and cystatin C levels. GFR was based on the CKD Epidemiology Collaboration (CKD-EPI) equations (CKD-EPI creatinine (CKD-EPIcr), CKD-EPI cystatin C (CKD-EPIcys), CKD-EPI creatinine-cystatins (CKD-EPIcr-cys)), Modification of Diet in Renal Disease (MDRD) and Cockcroft-Gault formula (CGF). GFR < 60 mL/min/1.73 m2 defined CKD. Results Among 392 men and 700 women, mean GFR, was between 114.0 (CKD-EPIcr) and 135.4 mL/min/1.73 m2 (CGF) in men, and between 107.5 (CKD-EPIcr-cys) and 173.4 mL/min/1.73 m2 (CGF) in women. CKD prevalence ranged from 2.3% (CKD-EPIcr and MDRD) to 5.1% (CKD-EPIcys) in men and 1.6% (CGF) to 6.7% (CKD-EPIcr-cys) in women. The kappa statistic was high between CKD-EPIcr and MDRD (0.934), and CKD-EPIcys and CKD-EPIcr-cys (0.815), but fair-to-moderate between the other eqs. (0.353–0.565). In the basic regressions, older age and body mass index ≥30 kg/m2, but not gender, were significantly associated with CKD-EPIcr-defined CKD. In the presence of these three variables, hypertension, heart rate ≥ 90 beats/minute, diabetes and low-density lipoprotein cholesterol were significant predictors of prevalent CKD. Conclusions Varying CKD prevalence estimates, because of different GFR equations used, underscores the need to improve accuracy of CKD diagnoses. Furthermore, screening for CKD should be incorporated into the routine assessment of high-risk patients such as those with hypertension or diabetes.
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Affiliation(s)
- Nasheeta Peer
- Non-communicable Diseases Research Unit, South African Medical Research Council, Durban and Cape Town, South Africa. .,Department of Medicine, University of Cape Town, Cape Town, South Africa.
| | - Jaya George
- Department of Chemical Pathology, University of the Witwatersrand, and National Health Laboratory Services, Johannesburg, South Africa
| | - Carl Lombard
- Biostatistics Unit, South African Medical Research Council, Cape Town, South Africa
| | - Krisela Steyn
- Chronic Disease Initiative for Africa, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Naomi Levitt
- Department of Medicine, University of Cape Town, Cape Town, South Africa.,Chronic Disease Initiative for Africa, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Andre-Pascal Kengne
- Non-communicable Diseases Research Unit, South African Medical Research Council, Durban and Cape Town, South Africa.,Department of Medicine, University of Cape Town, Cape Town, South Africa
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171
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Chu CD, McCulloch CE, Banerjee T, Pavkov ME, Burrows NR, Gillespie BW, Saran R, Shlipak MG, Powe NR, Tuot DS. CKD Awareness Among US Adults by Future Risk of Kidney Failure. Am J Kidney Dis 2020; 76:174-183. [PMID: 32305206 PMCID: PMC7387135 DOI: 10.1053/j.ajkd.2020.01.007] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 01/06/2020] [Indexed: 12/22/2022]
Abstract
RATIONALE & OBJECTIVE Persons with chronic kidney disease (CKD) are often unaware of their disease status. Efforts to improve CKD awareness may be most effective if focused on persons at highest risk for progression to kidney failure. STUDY DESIGN Serial cross-sectional surveys. SETTING & PARTICIPANTS Nonpregnant adults (aged≥20 years) with CKD glomerular filtration rate categories 3-4 (G3-G4) who participated in the National Health and Nutrition Examination Survey from 1999 to 2016 (n = 3,713). PREDICTOR 5-year kidney failure risk, estimated using the Kidney Failure Risk Equation. Predicted risk was categorized as minimal (<2%), low (2%-<5%), intermediate (5%-<15%), or high (≥15%). OUTCOME CKD awareness, defined by answering "yes" to the question "Have you ever been told by a doctor or other health professional that you had weak or failing kidneys?" ANALYTICAL APPROACH Prevalence of CKD awareness was estimated within each risk group using complex sample survey methods. Associations between Kidney Failure Risk Equation risk and CKD awareness were assessed using multivariable logistic regression. CKD awareness was compared with awareness of hypertension and diabetes during the same period. RESULTS In 2011 to 2016, unadjusted CKD awareness was 9.6%, 22.6%, 44.7%, and 49.0% in the minimal-, low-, intermediate-, and high-risk groups, respectively. In adjusted analyses, these proportions did not change over time. Awareness of CKD, including among the highest risk group, remains consistently below that of hypertension and diabetes and awareness of these conditions increased over time. LIMITATIONS Imperfect sensitivity of the "weak or failing kidneys" question for ascertaining CKD awareness. CONCLUSIONS Among adults with CKD G3-G4 who have 5-year estimated risks for kidney failure of 5%-<15% and≥15%, approximately half were unaware of their kidney disease, a gap that has persisted nearly 2 decades.
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Affiliation(s)
- Chi D Chu
- Departments of Medicine, University of California San Francisco, San Francisco, CA.
| | - Charles E McCulloch
- Biostatistics and Epidemiology, University of California San Francisco, San Francisco, CA
| | - Tanushree Banerjee
- Departments of Medicine, University of California San Francisco, San Francisco, CA
| | - Meda E Pavkov
- Division of Diabetes Translation, Centers for Disease Control and Prevention, Atlanta, GA
| | - Nilka R Burrows
- Division of Diabetes Translation, Centers for Disease Control and Prevention, Atlanta, GA
| | - Brenda W Gillespie
- Kidney Epidemiology and Cost Center, University of Michigan, Ann Arbor, MI
| | - Rajiv Saran
- Kidney Epidemiology and Cost Center, University of Michigan, Ann Arbor, MI; Division of Nephrology, Department of Medicine, University of Michigan, Ann Arbor, MI
| | - Michael G Shlipak
- Kidney Health Research Collaborative, San Francisco Veterans Affairs Hospital, San Francisco, CA
| | - Neil R Powe
- Departments of Medicine, University of California San Francisco, San Francisco, CA; Department of Medicine, Priscilla Chan and Mark Zuckerberg San Francisco General Hospital, San Francisco, CA
| | - Delphine S Tuot
- Departments of Medicine, University of California San Francisco, San Francisco, CA; Department of Medicine, Priscilla Chan and Mark Zuckerberg San Francisco General Hospital, San Francisco, CA
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172
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Jonsson AJ, Lund SH, Eriksen BO, Palsson R, Indridason OS. The prevalence of chronic kidney disease in Iceland according to KDIGO criteria and age-adapted estimated glomerular filtration rate thresholds. Kidney Int 2020; 98:1286-1295. [PMID: 32622831 DOI: 10.1016/j.kint.2020.06.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 06/02/2020] [Accepted: 06/04/2020] [Indexed: 10/23/2022]
Abstract
Most epidemiological studies on chronic kidney disease (CKD) are based solely on estimated glomerular filtration rate (eGFR). Few studies have included proteinuria, while the chronicity criterion is usually omitted. To explore this, we examined the prevalence of CKD stages 1-5 in Iceland based on multiple markers of kidney damage. All serum creatinine values, urine protein measurements and diagnostic codes for kidney diseases and comorbid conditions for people aged 18 years and older were obtained from electronic medical records of all healthcare institutions in Iceland in 2008-2016. CKD was defined according to the Kidney Disease: Improving Global Outcomes (KDIGO) clinical practice guideline using diagnoses indicative of a chronic kidney disease, proteinuria and/or an eGFR under 60 mL/min/1.73 m2 for over three months. Mean annual age-standardized prevalence of CKD stages 1-5 was calculated based on the KDIGO criteria and age-adapted eGFR thresholds from 2,120,147 creatinine values for 218,437 individuals, 306,531 proteinuria measurements for 86,364 individuals and 6973 individuals carrying a kidney disease diagnosis. Median age was 63 years (range, 18-106) and 47% were male. The mean annual age standardized CKD prevalence was 5.13% for men and 6.75% for women using the KDIGO criteria but by age-adapted eGFR cut-offs, the prevalence was 3.27% for men and 4.01% for women. Thus, our nationwide study, defining CKD in Iceland with strict adherence to the KDIGO criteria, demonstrates a lower prevalence of CKD than anticipated from most previous studies.
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Affiliation(s)
- Arnar J Jonsson
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland; Internal Medicine Services, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
| | - Sigrun H Lund
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Bjørn O Eriksen
- Metabolic and Renal Research Group, UiT The Arctic University of Norway, Tromsø, Norway
| | - Runolfur Palsson
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland; Internal Medicine Services, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland; Division of Nephrology, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
| | - Olafur S Indridason
- Internal Medicine Services, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland; Division of Nephrology, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland.
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173
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Kattah AG, Garovic VD. Understanding sex differences in progression and prognosis of chronic kidney disease. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:897. [PMID: 32793741 DOI: 10.21037/atm.2020.03.62] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Andrea G Kattah
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
| | - Vesna D Garovic
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN, USA
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174
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Lenders M, Nordbeck P, Canaan-Kühl S, Kreul L, Duning T, Lorenz L, Pogoda C, Brand SM, Wanner C, Brand E. Treatment switch in Fabry disease- a matter of dose? J Med Genet 2020; 58:342-350. [PMID: 32522756 DOI: 10.1136/jmedgenet-2020-106874] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 05/04/2020] [Accepted: 05/05/2020] [Indexed: 02/05/2023]
Abstract
BACKGROUND Patients with Fabry disease (FD) on reduced dose of agalsidase-beta or after switch to agalsidase-alfa show a decline in chronic kidney disease epidemiology collaboration-based estimated glomerular filtration rate (eGFR) and a worsened plasma lyso-Gb3 decrease. Hence, the most effective dose is still a matter of debate. METHODS In this prospective observational study, we assessed end-organ damage and clinical symptoms in 78 patients who had received agalsidase-beta (1.0 mg/kg) for >1 year, which were assigned to continue this treatment (agalsidase-beta, regular-dose group, n=17); received a reduced dose of agalsidase-beta and subsequent switch to agalsidase-alfa (0.2 mg/kg) or a direct switch to 0.2 mg/kg agalsidase-alfa (switch group, n=22); or were re-switched to agalsidase-beta after receiving agalsidase-alfa for 12 months (re-switch group, n=39) with a follow-up of 88±25 months. RESULTS No differences for clinical events were observed for all groups. Patients within the re-switch group started with the worst eGFR values at baseline (p=0.0217). Overall, eGFR values remained stable in the regular-dose group (p=0.1052) and decreased significantly in the re-switch and switch groups (p<0.0001 and p=0.0052, respectively). However, in all groups males presented with an annual loss of eGFR by -2.9, -2.5 and -3.9 mL/min/1.73 m² (regular-dose, re-switch, switch groups, all p<0.05). In females, eGFR decreased significantly only in the re-switch group by -2.9 mL/min/1.73 m² per year (p<0.01). Lyso-Gb3 decreased in the re-switch group after a change back to agalsidase-beta (p<0.05). CONCLUSIONS Our data suggest that a re-switch to high dosage of agalsidase results in a better biochemical response, but not in a significant renal amelioration especially in classical males.
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Affiliation(s)
- Malte Lenders
- Internal Medicine D, Department of Nephrology, Hypertension and Rheumatology and Interdisciplinary Fabry Center Münster (IFAZ), University Hospital Münster, Münster, Germany
| | - Peter Nordbeck
- Department of Internal Medicine I, Divisions of Cardiology and Nephrology, Comprehensive Heart Failure Center, Fabry Center for Interdisciplinary Therapy (FAZIT), University Hospital and University of Würzburg, Würzburg, Germany
| | - Sima Canaan-Kühl
- Department of Medicine, Division of Nephrology, Charité, Universitätsmedizin Campus Mitte, Berlin, Germany
| | - Lukas Kreul
- Department of Internal Medicine I, Divisions of Cardiology and Nephrology, Comprehensive Heart Failure Center, Fabry Center for Interdisciplinary Therapy (FAZIT), University Hospital and University of Würzburg, Würzburg, Germany
| | - Thomas Duning
- Department of Neurology, and Interdisciplinary Fabry Center Münster (IFAZ), University Hospital Münster, Münster, Germany
| | - Lora Lorenz
- Department of Internal Medicine I, Divisions of Cardiology and Nephrology, Comprehensive Heart Failure Center, Fabry Center for Interdisciplinary Therapy (FAZIT), University Hospital and University of Würzburg, Würzburg, Germany
| | - Christian Pogoda
- Department of Cardiology I - Coronary and Peripheral Vascular Disease, Heart Failure, and Interdisciplinary Fabry Center Münster (IFAZ), University Hospital Münster, Münster, Germany
| | - Stefan-Martin Brand
- Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease, and Interdisciplinary Fabry Center Münster (IFAZ), University Hospital Münster, Münster, Germany
| | - Christoph Wanner
- Department of Internal Medicine I, Divisions of Cardiology and Nephrology, Comprehensive Heart Failure Center, Fabry Center for Interdisciplinary Therapy (FAZIT), University Hospital and University of Würzburg, Würzburg, Germany
| | - Eva Brand
- Internal Medicine D, Department of Nephrology, Hypertension and Rheumatology and Interdisciplinary Fabry Center Münster (IFAZ), University Hospital Münster, Münster, Germany
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175
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Eriksen BO, Palsson R, Ebert N, Melsom T, van der Giet M, Gudnason V, Indridason OS, Inker LA, Jenssen TG, Levey AS, Solbu MD, Tighiouart H, Schaeffner E. GFR in Healthy Aging: an Individual Participant Data Meta-Analysis of Iohexol Clearance in European Population-Based Cohorts. J Am Soc Nephrol 2020; 31:1602-1615. [PMID: 32499396 DOI: 10.1681/asn.2020020151] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/07/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Population mean GFR is lower in older age, but it is unknown whether healthy aging is associated with preserved rather than lower GFR in some individuals. METHODS We investigated the cross-sectional association between measured GFR, age, and health in persons aged 50-97 years in the general population through a meta-analysis of iohexol clearance measurements in three large European population-based cohorts. We defined a healthy person as having no major chronic disease or risk factors for CKD and all others as unhealthy. We used a generalized additive model to study GFR distribution by age according to health status. RESULTS There were 935 (22%) GFR measurements in persons who were healthy and 3274 (78%) in persons who were unhealthy. The mean GFR was lower in older age by -0.72 ml/min per 1.73 m2 per year (95% confidence interval [95% CI], -0.96 to -0.48) for men who were healthy versus -1.03 ml/min per 1.73 m2 per year (95% CI, -1.25 to -0.80) for men who were unhealthy, and by -0.92 ml/min per 1.73 m2 per year (95% CI, -1.14 to -0.70) for women who were healthy versus -1.22 ml/min per 1.73 m2 per year (95% CI, -1.43 to -1.02) for women who were unhealthy. For healthy and unhealthy people of both sexes, both the 97.5th and 2.5th GFR percentiles exhibited a negative linear association with age. CONCLUSIONS Healthy aging is associated with a higher mean GFR compared with unhealthy aging. However, both the mean and 97.5 percentiles of the GFR distribution are lower in older persons who are healthy than in middle-aged persons who are healthy. This suggests that healthy aging is not associated with preserved GFR in old age.
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Affiliation(s)
- Bjørn O Eriksen
- Metabolic and Renal Research Group, University of Tromsø - The Arctic University of Norway, Tromsø, Norway .,Section of Nephrology, Clinic of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Runolfur Palsson
- Division of Nephrology, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland.,University of Iceland, Reykjavik, Iceland
| | - Natalie Ebert
- Institute of Public Health, Charité - Berlin University of Medicine, Berlin, Germany
| | - Toralf Melsom
- Metabolic and Renal Research Group, University of Tromsø - The Arctic University of Norway, Tromsø, Norway.,Section of Nephrology, Clinic of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Markus van der Giet
- Department of Nephrology, Charité - Berlin University of Medicine, Berlin, Germany
| | - Vilmundur Gudnason
- University of Iceland, Reykjavik, Iceland.,Icelandic Heart Association, Kopavogur, Iceland
| | - Olafur S Indridason
- Division of Nephrology, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
| | - Lesley A Inker
- Division of Nephrology, Tufts Medical Center, Boston, Massachusetts
| | - Trond G Jenssen
- Metabolic and Renal Research Group, University of Tromsø - The Arctic University of Norway, Tromsø, Norway.,Department of Organ Transplantation, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Andrew S Levey
- Division of Nephrology, Tufts Medical Center, Boston, Massachusetts
| | - Marit D Solbu
- Metabolic and Renal Research Group, University of Tromsø - The Arctic University of Norway, Tromsø, Norway.,Section of Nephrology, Clinic of Internal Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Hocine Tighiouart
- Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Boston, Massachusetts.,Tufts Clinical and Translational Science Institute, Tufts University, Boston, Massachusetts
| | - Elke Schaeffner
- Institute of Public Health, Charité - Berlin University of Medicine, Berlin, Germany
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176
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Malmgren L, McGuigan FE, Christensson A, Akesson KE. Longitudinal Changes in Kidney Function Estimated from Cystatin C and Its Association with Mortality in Elderly Women. Nephron Clin Pract 2020; 144:290-298. [PMID: 32392561 DOI: 10.1159/000507256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 03/14/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Prospective data on age-related changes in kidney function are required, especially since the current Kidney Disease Improving Global Outcomes (KDIGO) definition has been suggested to classify a large number of elderly people with CKD. OBJECTIVE This study, a complement to our previous Cr-based study in the same cohort, is aimed at evaluating cystatin C (cysC)-based changes in kidney function during aging in older women and analyzing the association between CKD and mortality through 10 years of follow-up. METHODS cysC was available in 981 women from the Osteoporosis Prospective Risk Assessment (OPRA) cohort, all aged 75 years on entry. Reinvestigations were made after 5 (n = 685) and 10 years (n = 365). Kidney function was estimated (estimated glomerular filtration rate [eGFR]) using Chronic Kidney Disease Epidemiology Collaboration cysC and Caucasian, Asian, Pediatric, and Adult cysC equations and the change in function calculated. Women were staged equivalent to CKD stage 1, 2, 3a, or 3b-5 according to the KDIGO classification. Mortality risk was estimated for 5-year or 10-year follow-up time using Cox proportional hazard analyses (reference category, CKD stages 1 and 2). RESULTS Mortality risk for women with the worst kidney function (CKD stages 3b-5) increased during both 5-year follow-up times compared to that for women in stages 1 and 2 (age 75-80 years: adjusted Hazard Ratio [HRadj] 3.9, 95% confidence interval [CI] 2.3-6.5; age 80-85 years: HRadj 1.7, 95% CI 1.0-2.7). In contrast, women in stage 3a had increased risk only in the first 5-year follow-up (HRadj 1.7, 95% CI 1.0-3.0, age 75-80 years). Change in kidney function amounted to a loss of 1.9 (±1.4) mL/min/1.73 m2 per year during the 10-year follow-up, and at age 85 years, 4 of every 5 women had an eGFR equivalent to CKD. CONCLUSION In the future, an age-adapted definition of CKD, lowering the threshold for CKD in the elderly, may be beneficial to avoid overdiagnosis of CKD.
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Affiliation(s)
- Linnea Malmgren
- Department of Clinical Sciences Malmö, Clinical and Molecular Osteoporosis Research Unit, Lund University, Malmö, Sweden.,Department of Geriatrics, Skåne University Hospital, Malmö, Sweden
| | - Fiona E McGuigan
- Department of Clinical Sciences Malmö, Clinical and Molecular Osteoporosis Research Unit, Lund University, Malmö, Sweden.,Department of Orthopedics, Skåne University Hospital, Malmö, Sweden
| | - Anders Christensson
- Department of Clinical Sciences Malmö, Clinical and Molecular Osteoporosis Research Unit, Lund University, Malmö, Sweden.,Department of Nephrology, Skåne University Hospital, Malmö, Sweden
| | - Kristina E Akesson
- Department of Clinical Sciences Malmö, Clinical and Molecular Osteoporosis Research Unit, Lund University, Malmö, Sweden, .,Department of Orthopedics, Skåne University Hospital, Malmö, Sweden,
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177
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Franzin R, Stasi A, Fiorentino M, Stallone G, Cantaluppi V, Gesualdo L, Castellano G. Inflammaging and Complement System: A Link Between Acute Kidney Injury and Chronic Graft Damage. Front Immunol 2020; 11:734. [PMID: 32457738 PMCID: PMC7221190 DOI: 10.3389/fimmu.2020.00734] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 03/31/2020] [Indexed: 12/13/2022] Open
Abstract
The aberrant activation of complement system in several kidney diseases suggests that this pillar of innate immunity has a critical role in the pathophysiology of renal damage of different etiologies. A growing body of experimental evidence indicates that complement activation contributes to the pathogenesis of acute kidney injury (AKI) such as delayed graft function (DGF) in transplant patients. AKI is characterized by the rapid loss of the kidney's excretory function and is a complex syndrome currently lacking a specific medical treatment to arrest or attenuate progression in chronic kidney disease (CKD). Recent evidence suggests that independently from the initial trigger (i.e., sepsis or ischemia/reperfusions injury), an episode of AKI is strongly associated with an increased risk of subsequent CKD. The AKI-to-CKD transition may involve a wide range of mechanisms including scar-forming myofibroblasts generated from different sources, microvascular rarefaction, mitochondrial dysfunction, or cell cycle arrest by the involvement of epigenetic, gene, and protein alterations leading to common final signaling pathways [i.e., transforming growth factor beta (TGF-β), p16 ink4a , Wnt/β-catenin pathway] involved in renal aging. Research in recent years has revealed that several stressors or complications such as rejection after renal transplantation can lead to accelerated renal aging with detrimental effects with the establishment of chronic proinflammatory cellular phenotypes within the kidney. Despite a greater understanding of these mechanisms, the role of complement system in the context of the AKI-to-CKD transition and renal inflammaging is still poorly explored. The purpose of this review is to summarize recent findings describing the role of complement in AKI-to-CKD transition. We will also address how and when complement inhibitors might be used to prevent AKI and CKD progression, therefore improving graft function.
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Affiliation(s)
- Rossana Franzin
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Bari, Italy
- Department Translational Medicine, University of Piemonte Orientale, Novara, Italy
| | - Alessandra Stasi
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Bari, Italy
| | - Marco Fiorentino
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Bari, Italy
| | - Giovanni Stallone
- Nephrology, Dialysis and Transplantation Unit, Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
| | - Vincenzo Cantaluppi
- Department Translational Medicine, University of Piemonte Orientale, Novara, Italy
| | - Loreto Gesualdo
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Bari, Italy
| | - Giuseppe Castellano
- Nephrology, Dialysis and Transplantation Unit, Department of Emergency and Organ Transplantation, University of Bari Aldo Moro, Bari, Italy
- Nephrology, Dialysis and Transplantation Unit, Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy
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178
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Zitt E, Fischer A, Lhotta K, Concin H, Nagel G. Sex- and age-specific variations, temporal trends and metabolic determinants of serum uric acid concentrations in a large population-based Austrian cohort. Sci Rep 2020; 10:7578. [PMID: 32371883 PMCID: PMC7200724 DOI: 10.1038/s41598-020-64587-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 04/14/2020] [Indexed: 11/19/2022] Open
Abstract
Little is known about sex- and age-specific variations and temporal trends in serum uric acid (SUA) concentrations, the prevalence of hyperuricemia and its association with metabolic risk factors in the general population. Between January 1, 1985 and June 30, 2005 146,873 participants (42% women) were recruited. Prevalence of hyperuricemia was estimated applying a common (SUA > 360 µmol/L) and sex-specific cut-off points (women > 340 µmol/L, men > 420 µmol/L). At baseline, mean age was 41.2 years in men and 51.5 years in women, mean SUA concentration was 314.8 µmol/L and 243.6 µmol/L, respectively. Applying a common cut-off point, the prevalence of hyperuricemia was 18.5% in men and 4.4% in women and by sex-specific cut-off points it was 15.1% and 13.8%, respectively. SUA levels increased by 6.7 µmol/L per decade in men, but remained constant in women until the age of 50 years with a sharp increase by approximately 22 µmol/L per decade thereafter. In men and women, hyperuricemia was associated with obesity, hypertriglyceridemia and elevated gamma-glutamyl transferase. With increasing age SUA levels and the prevalence of hyperuricemia rise in a sex-specific manner. Above the age of 65 years, the sex-specific prevalence of hyperuricemia in women outreaches that in men.
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Affiliation(s)
- Emanuel Zitt
- Vorarlberg Institute for Vascular Investigation and Treatment (VIVIT), Academic Teaching Hospital Feldkirch, Feldkirch, Austria.,Department of Internal Medicine III (Nephrology and Dialysis), Academic Teaching Hospital Feldkirch, Feldkirch, Austria.,Agency for Preventive and Social Medicine, Bregenz, Austria
| | - Anton Fischer
- Vorarlberg Institute for Vascular Investigation and Treatment (VIVIT), Academic Teaching Hospital Feldkirch, Feldkirch, Austria.,Agency for Preventive and Social Medicine, Bregenz, Austria
| | - Karl Lhotta
- Vorarlberg Institute for Vascular Investigation and Treatment (VIVIT), Academic Teaching Hospital Feldkirch, Feldkirch, Austria.,Department of Internal Medicine III (Nephrology and Dialysis), Academic Teaching Hospital Feldkirch, Feldkirch, Austria
| | - Hans Concin
- Agency for Preventive and Social Medicine, Bregenz, Austria
| | - Gabriele Nagel
- Agency for Preventive and Social Medicine, Bregenz, Austria. .,Institute for Epidemiology and Medical Biometry, Ulm University, Ulm, Germany.
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179
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Therapeutic management of HIV-infected patients with chronic kidney disease. J Nephrol 2020; 33:699-713. [PMID: 32020538 DOI: 10.1007/s40620-020-00701-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 01/02/2020] [Indexed: 02/06/2023]
Abstract
CKD and HIV infection are two chronic diseases impacting heavily on the survival of the affected patients. The interplay between HIV infection and chronic kidney disease (CKD) is complex and interactions occur at multiple levels. Approach to the management of HIV-infected patients requires special attention to face the numerous therapeutic difficulties ranging from drug-drug interactions to drug-toxicity. The most effective strategy is targeted to suppression of HIV viral load, as it dramatically changes the prognosis of the patients as well as prevents the development of HIV-associated kidney disease. As shown in this review, the approach to the therapeutic management of CKD in the setting of HIV infection varies in relation to the degree of renal impairment.
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180
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Knowledge related to Chronic Kidney Disease (CKD) and perceptions on inpatient management practices among nurses at selected referral hospitals in Rwanda: A non-experimental descriptive correlational study. INTERNATIONAL JOURNAL OF AFRICA NURSING SCIENCES 2020. [DOI: 10.1016/j.ijans.2020.100203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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181
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Should the definition of CKD be changed to include age-adapted GFR criteria? YES. Kidney Int 2020; 97:34-37. [DOI: 10.1016/j.kint.2019.08.033] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 08/27/2019] [Indexed: 11/20/2022]
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182
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Affiliation(s)
- Andrew D Rule
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota
| | - Kitty J Jager
- Department of Medical Informatics, Amsterdam UMC, University of Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
| | - Jan A J G van den Brand
- Department of Nephrology, Radboud Institute for Health Sciences, Radbound UMC, Nijmegen, The Netherlands; and
| | - Pierre Delanaye
- Department of Nephrology-Dialysis-Transplantation, University of Liège (ULg CHU), CHU Sart Tilman, Liège, Belgium
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183
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184
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Coresh J, Gansevoort RT, Levin A, Jadoul M. Current CKD Definition Takes into Account Both Relative and Absolute Risk. J Am Soc Nephrol 2019; 31:447-448. [PMID: 31871274 DOI: 10.1681/asn.2019101049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Josef Coresh
- Epidemiology, Medicine, Biostatistics, and CKD Prognosis Consortium, The Johns Hopkins University, Baltimore, Maryland;
| | - Ron T Gansevoort
- Nephrology, and CKD Prognosis Consortium, University of Groningen, Groningen, Netherlands
| | | | - Adeera Levin
- Nephrology, and KDIGO, St. Paul Hospital, Vancouver, Canada; and
| | - Michel Jadoul
- Department of Nephrology, Cliniques Universitaires St-Luc, and KDIGO, Université Catholique de Louvain, Brussels, Belgium
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185
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Nephrology a discipline evolving into complexity: between complex systems and philosophy. J Nephrol 2019; 33:1-4. [PMID: 31776945 DOI: 10.1007/s40620-019-00674-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 11/12/2019] [Indexed: 10/25/2022]
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186
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Affiliation(s)
- Donald E Wesson
- Baylor Scott and White Health and Wellness Center, Dallas, Texas; and .,Department of Internal Medicine, Texas A&M Health Sciences Center College of Medicine, Dallas, Texas
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187
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Chertow GM, Beddhu S. Modification of eGFR-Based CKD Definitions: Perfect, or Enemy of the Good? J Am Soc Nephrol 2019; 30:1807-1809. [PMID: 31506290 DOI: 10.1681/asn.2019070743] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- Glenn M Chertow
- Division of Nephrology, Departments of Medicine and .,Department of Health Research and Policy, Stanford University School of Medicine, Stanford, California; and
| | - Srinivasan Beddhu
- Medical Service, Veterans Affairs Salt Lake City Health Care System, and.,University of Utah School of Medicine, Salt Lake City, Utah
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