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- Aperia, A
(author)
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Renal dopamine system and salt balance
- 1998
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In: American journal of kidney diseases : the official journal of the National Kidney Foundation. - 0272-6386. ; 31:2, s. XLIII-XLV
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Journal article (peer-reviewed)
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- BERGSTROM, J
(author)
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Why are dialysis patients malnourished?
- 1995
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In: American journal of kidney diseases : the official journal of the National Kidney Foundation. - : Elsevier BV. - 0272-6386. ; 26:1, s. 229-241
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Journal article (peer-reviewed)
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- Kopple, JD, et al.
(author)
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A proposed glossary for dialysis kinetics
- 1995
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In: American journal of kidney diseases : the official journal of the National Kidney Foundation. - : Elsevier BV. - 0272-6386. ; 26:6, s. 963-981
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Journal article (other academic/artistic)
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- Uhlin, Fredrik, et al.
(author)
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Estimation of delivered dialysis dose by on-line monitoring of the ultraviolet absorbance in the spent dialysate
- 2003
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In: American Journal of Kidney Diseases. - 0272-6386 .- 1523-6838. ; 41:5, s. 1026-1036
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Journal article (peer-reviewed)abstract
- Background:Several methods are available to determine Kt/V, from predialysis and postdialysis blood samples to using on-line dialysate urea monitors or to ionic dialysance using a conductivity method. The aim of this study is to compare Kt/V calculated from the slope of the logarithmic on-line ultraviolet (UV) absorbance measurements, blood urea Kt/V, dialysate urea Kt/V, and Kt/V from the Urea Monitor 1000 (UM; Baxter Healthcare Corp, Deerfield, IL).Methods:Thirteen uremic patients on chronic thrice-weekly hemodialysis therapy were included in the study. The method uses absorption of UV radiation by means of a spectrophotometric set-up. Measurements were performed on-line with the spectrophotometer connected to the fluid outlet of the dialysis machine; all spent dialysate passed through a specially designed cuvette for optical single-wavelength measurements. UV absorbance measurements were compared with those calculated using blood urea and dialysate urea, and, in a subset of treatments, the UM.Results:Equilibrated Kt/V (eKt/V) obtained with UV absorbance (eKt/Va) was 1.19 ± 0.23; blood urea (eKt/Vb), 1.30 ± 0.20, and dialysate urea (eKt/Vd), 1.26 ± 0.21, and Kt/V in a subset measured by the UM (UM Kt/V) was 1.24 ± 0.18. The difference between eKt/Vb and eKt/Va was 0.10 ± 0.11, showing a variation similar to the difference between eKt/Vb and eKt/Vd (0.03 ± 0.10) and in a subset between eKt/Vb and UM Kt/V (−0.02 ± 0.11).Conclusion:The study suggests that urea Kt/V can be estimated by on-line measurement of UV absorption in the spent dialysate.
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- Albert, Christian, et al.
(author)
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Neutrophil Gelatinase-Associated Lipocalin Measured on Clinical Laboratory Platforms for the Prediction of Acute Kidney Injury and the Associated Need for Dialysis Therapy : A Systematic Review and Meta-analysis
- 2020
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In: American Journal of Kidney Diseases. - : Elsevier BV. - 0272-6386 .- 1523-6838. ; 76:6, s. 826-
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Research review (peer-reviewed)abstract
- Rationale & Objective: The usefulness of measures of neutrophil gelatinase-associated lipocalin (NGAL) in urine or plasma obtained on clinical laboratory platforms for predicting acute kidney injury (AKI) and AKI requiring dialysis (AKI-D) has not been fully evaluated. We sought to quantitatively summarize published data to evaluate the value of urinary and plasma NGAL for kidney risk prediction.Study Design: Literature-based meta-analysis and individual-study-data meta-analysis of diagnostic studies following PRISMA-IPD guidelines.Setting & Study Populations: Studies of adults investigating AKI, severe AKI, and AKI-D in the setting of cardiac surgery, intensive care, or emergency department care using either urinary or plasma NGAL measured on clinical laboratory platforms.Selection Criteria for Studies: PubMed, Web of Science, Cochrane Library, Scopus, and congress abstracts ever published through February 2020 reporting diagnostic test studies of NGAL measured on clinical laboratory platforms to predict AKI.Data Extraction: Individual-study-data meta analysis was accomplished by giving authors data specifications tailored to their studies and requesting standardized patient-level data analysis.Analytical Approach: Individual-study-data meta analysis used a bivariate time-to-event model for interval-censored data from which discriminative ability (AUC) was characterized. NGAL cutoff concentrations at 95% sensitivity, 95% specificity, and optimal sensitivity and specificity were also estimated. Models incorporated as confounders the clinical setting and use versus nonuse of urine output as a criterion for AKI. A literature-based meta-analysis was also performed for all published studies including those for which the authors were unable to provide individual-study data analyses.Results: We included 52 observational studies involving 13,040 patients. We analyzed 30 data sets for the individual-study-data meta-analysis. For AKI, severe AKI, and AKI-D, numbers of events were 837, 304, and 103 for analyses of urinary NGAL, respectively; these values were 705, 271, and 178 for analyses of plasma NGAL. Discriminative performance was similar in both meta-analyses. Individual-study-data meta-analysis AUCs for urinary NGAL were 0.75 (95% CI, 0.73-0.76) and 0.80 (95% CI, 0.79-0.81) for severe AKI and AKI-D, respectively; for plasma NGAL, the corresponding AUCs were 0.80 (95% CI, 0.790.81) and 0.86 (95% CI, 0.84-0.8 6). Cutoff concentrations at 95% specificity for urinary NGAL were >580 ng/mL with 27% sensitivity for severe AKI and >589 ng/mL with 24% sensitivity for AKI-D. Corresponding cutoffs for plasma NGAL were >364 ng/mL with 44% sensitivity and >546 ng/mL with 26% sensitivity, respectively.Limitations: Practice variability in initiation of dialysis. Imperfect harmonization of data across studies. Conclusions: Urinary and plasma NGAL concentrations may identify patients at high risk for AKI in clinical research and practice. The cutoff concentrations reported in this study require prospective evaluation.
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15. |
- Audard, Vincent, et al.
(author)
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A 59-kd renal antigen as a new target for rapidly progressive glomerulonephritis
- 2007
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In: American Journal of Kidney Diseases. - : Elsevier BV. - 1523-6838 .- 0272-6386. ; 49:5, s. 710-716
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Journal article (peer-reviewed)abstract
- Anti-glomerular basement membrane (anti-GBM) antibodies are the hallmark of anti-GBM disease, which is characterized by rapidly progressive glomerulonephritis. We describe the case of a 58-year-old woman who presented with rapidly progressive glomerulonephritis with typical anti-GBM staining found by means of direct immunofluorescence microscopy, associated with linear immunoglobin G deposits on tubules. Serum analysis showed circulating anti-tubular basement membrane antibodies, but failed to detect anti-GBM antibodies. Immunoblotting showed that serum antibodies reacted with a 59-kd antigen found along both the GBM and tubular basement membrane.
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- Bolignano, D, et al.
(author)
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Pulmonary hypertension in CKD
- 2013
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In: American journal of kidney diseases : the official journal of the National Kidney Foundation. - : Elsevier BV. - 1523-6838. ; 61:4, s. 612-622
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Journal article (peer-reviewed)
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- Chua, Horng-Ruey, et al.
(author)
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Initial and Extended Use of Femoral Versus Nonfemoral Double-Lumen Vascular Catheters and Catheter-Related Infection During Continuous Renal Replacement Therapy
- 2014
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In: American Journal of Kidney Diseases. - : Elsevier BV. - 0272-6386 .- 1523-6838. ; 64:6, s. 909-917
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Journal article (peer-reviewed)abstract
- Background: The risk of catheter-related infection or bacteremia, with initial and extended use of femoral versus nonfemoral sites for double-lumen vascular catheters (DLVCs) during continuous renal replacement therapy (CRRT), is unclear. Study Design: Retrospective observational cohort study. Setting & Participants: Critically ill patients on CRRT in a combined intensive care unit of a tertiary institution. Factor: Femoral versus nonfemoral venous DLVC placement. Outcomes: Catheter-related colonization (CRCOL) and bloodstream infection (CRBSI). Measurements: CRCOL/CRBSI rates expressed per 1,000 catheter-days. Results: We studied 458 patients (median age, 65 years; 60% males) and 647 DLVCs. Of 405 single-site only DLVC users, 82% versus 18% received exclusively 419 femoral versus 82 jugular or subclavian DLVCs, respectively. The corresponding DLVC indwelling duration was 6 +/- 4 versus 7 +/- 5 days (P = 0.03). Corresponding CRCOL and CRBSI rates (per 1,000 catheter-days) were 9.7 versus 8.8 events (P = 0.8) and 1.2 versus 3.5 events (P = 0.3), respectively. Overall, 96 patients with extended CRRT received femoral-site insertion first with subsequent site change, including 53 femoral guidewire exchanges, 53 new femoral venipunctures, and 47 new jugular/subclavian sites. CRCOL and CRBSI rates were similar for all such approaches (P = 0.7 and P = 0.9, respectively). On multivariate analysis, CRCOL risk was higher in patients older than 65 years and weighing >90 kg (ORs of 2.1 and 2.2, respectively; P < 0.05). This association between higher weight and greater CRCOL risk was significant for femoral DLVCs, but not for nonfemoral sites. Other covariates, including initial or specific DLVC site, guidewire exchange versus new venipuncture, and primary versus secondary DLVC placement, did not significantly affect CRCOL rates. Limitations: Nonrandomized retrospective design and single-center evaluation. Conclusions: CRCOL and CRBSI rates in patients on CRRT are low and not influenced significantly by initial or serial femoral catheterizations with guidewire exchange or new venipuncture. CRCOL risk is higher in older and heavier patients, the latter especially so with femoral sites.
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29. |
- Derner, Ondrej, et al.
(author)
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Incidence of Kidney Replacement Therapy and Subsequent Outcomes Among Patients With Systemic Lupus Erythematosus : Findings From the ERA Registry
- 2022
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In: American Journal of Kidney Diseases. - : Elsevier BV. - 0272-6386. ; 79:5, s. 635-645
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Journal article (peer-reviewed)abstract
- Rationale & Objective: There is a dearth of data characterizing patients receiving kidney replacement therapy (KRT) for kidney failure due to systemic lupus erythematosus (SLE) and their clinical outcomes. The aim of this study was to describe trends in incidence and prevalence of KRT among these patients as well as to compare their outcomes versus those of patients treated with KRT for diseases other than SLE. Study Design: Retrospective cohort study based on kidney registry data. Setting & Participants: Patients recorded in 14 registries of patients receiving KRT that provided data to the European Renal Association Registry between 1992 and 2016. Predictor: SLE as cause of kidney failure. Outcomes: Incidence and prevalence of KRT, patient survival while receiving KRT, patient and graft survival after kidney transplant, and specific causes of death. Analytical Approach: Kaplan-Meier methods and Cox regression models were fit to compare patient survival between the SLE and non-SLE groups, overall KRT, dialysis, and patient and graft survival after kidney transplant. Results: In total, 1,826 patients commenced KRT for kidney failure due to SLE, representing an incidence of 0.80 per million population (pmp) per year. The incidence remained stable during the study period (annual percent change, 0.1% [95% CI, −0.6% to 0.8%]). Patient survival among patients with SLE receiving KRT was similar to survival in the comparator group (hazard ratio [HR], 1.11 [95% CI, 0.99-1.23]). After kidney transplant, the risk of death was greater among patients with SLE than among patients in the comparator group (HR, 1.25 [95% CI, 1.02-1.53]), whereas the risk of all-cause graft failure was similar (HR, 1.09 [95% CI, 0.95-1.27]). Ten-year patient overall survival during KRT and patient and graft survival after kidney transplant improved over the study period (HRs of 0.71 [95% CI, 0.56-0.91], 0.43 [95% CI, 0.27-0.69], and 0.60 [95% CI, 0.43-0.84], respectively). Patients with SLE receiving KRT were significantly more likely to die of infections (24.8%) than patients in the comparator group (16.9%; P < 0.001). Limitations: No data were available on extrarenal manifestations of SLE, drug treatments, comorbidities, kidney transplant characteristics, or relapses of SLE. Conclusions: The prognosis of patients with SLE receiving KRT has improved over time. Survival of patients with SLE who required KRT was similar compared with patients who required KRT for other causes of kidney failure. Survival following kidney transplants was worse among patients with SLE.
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- Furth, SL, et al.
(author)
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Estimating Time to ESRD in Children With CKD
- 2018
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In: American journal of kidney diseases : the official journal of the National Kidney Foundation. - : Elsevier BV. - 1523-6838. ; 71:6, s. 783-792
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Journal article (peer-reviewed)
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- Grams, Morgan E, et al.
(author)
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A Meta-analysis of the Association of Estimated GFR, Albuminuria, Age, Race, and Sex With Acute Kidney Injury
- 2015
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In: American Journal of Kidney Diseases. - : Elsevier BV. - 0272-6386 .- 1523-6838. ; 66:4, s. 591-601
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Journal article (peer-reviewed)abstract
- BACKGROUND: Acute kidney injury (AKI) is a serious global public health problem. We aimed to quantify the risk of AKI associated with estimated glomerular filtration rate (eGFR), albuminuria (albumin-creatinine ratio [ACR]), age, sex, and race (African American and white).STUDY DESIGN: Collaborative meta-analysis.SETTING & POPULATION: 8 general-population cohorts (1,285,049 participants) and 5 chronic kidney disease (CKD) cohorts (79,519 participants).SELECTION CRITERIA FOR STUDIES: Available eGFR, ACR, and 50 or more AKI events.PREDICTORS: Age, sex, race, eGFR, urine ACR, and interactions.OUTCOME: Hospitalized with or for AKI, using Cox proportional hazards models to estimate HRs of AKI and random-effects meta-analysis to pool results.RESULTS: 16,480 (1.3%) general-population cohort participants had AKI over a mean follow-up of 4 years; 2,087 (2.6%) CKD participants had AKI over a mean follow-up of 1 year. Lower eGFR and higher ACR were strongly associated with AKI. Compared with eGFR of 80mL/min/1.73m(2), the adjusted HR of AKI at eGFR of 45mL/min/1.73m(2) was 3.35 (95% CI, 2.75-4.07). Compared with ACR of 5mg/g, the risk of AKI at ACR of 300mg/g was 2.73 (95% CI, 2.18-3.43). Older age was associated with higher risk of AKI, but this effect was attenuated with lower eGFR or higher ACR. Male sex was associated with higher risk of AKI, with a slight attenuation in lower eGFR but not in higher ACR. African Americans had higher AKI risk at higher levels of eGFR and most levels of ACR.LIMITATIONS: Only 2 general-population cohorts could contribute to analyses by race; AKI identified by diagnostic code.CONCLUSIONS: Reduced eGFR and increased ACR are consistent strong risk factors for AKI, whereas associations of AKI with age, sex, and race may be weaker in more advanced stages of CKD.
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- Grams, Morgan E, et al.
(author)
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Acute Kidney Injury After Major Surgery : A Retrospective Analysis of Veterans Health Administration Data.
- 2016
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In: American Journal of Kidney Diseases. - : Saunders Elsevier. - 0272-6386 .- 1523-6838. ; 67:6, s. 872-880
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Journal article (peer-reviewed)abstract
- BACKGROUND: Few trials of acute kidney injury (AKI) prevention after surgery have been conducted, and most observational studies focus on AKI following cardiac surgery. The frequency of, risk factors for, and outcomes after AKI following other types of major surgery have not been well characterized and may present additional opportunities for trials in AKI.STUDY DESIGN: Observational cohort study.SETTING & PARTICIPANTS: 3.6 million US veterans followed up from 2004 to 2011 for the receipt of major surgery (cardiac; general; ear, nose, and throat; thoracic; vascular; urologic; and orthopedic) and postoperative outcomes.FACTORS: Demographics, health characteristics, and type of surgery.OUTCOMES: Postoperative AKI defined by the KDIGO creatinine criteria, postoperative length of stay, end-stage renal disease, and mortality.RESULTS: Postoperative AKI occurred in 11.8% of the 161,185 major surgery hospitalizations (stage 1, 76%; stage 2, 15%, stage 3 [without dialysis], 7%; and AKI requiring dialysis, 2%). Cardiac surgery had the highest postoperative AKI risk (relative risk [RR], 1.22; 95% CI, 1.17-1.27), followed by general (reference), thoracic (RR, 0.92; 95% CI, 0.87-0.98), orthopedic (RR, 0.70; 95% CI, 0.67-0.73), vascular (RR, 0.68; 95% CI, 0.64-0.71), urologic (RR, 0.65; 95% CI, 0.61-0.69), and ear, nose, and throat (RR, 0.32; 95% CI, 0.28-0.37) surgery. Risk factors for postoperative AKI included older age, African American race, hypertension, diabetes mellitus, and, for estimated glomerular filtration rate < 90mL/min/1.73m(2), lower estimated glomerular filtration rate. Participants with postoperative AKI had longer lengths of stay (15.8 vs 8.6 days) and higher rates of 30-day hospital readmission (21% vs 13%), 1-year end-stage renal disease (0.94% vs 0.05%), and mortality (19% vs 8%), with similar associations by type of surgery and more severe stage of AKI relating to poorer outcomes.LIMITATIONS: Urine output was not available to classify AKI; cohort included mostly men.CONCLUSIONS: AKI was common after major surgery, with similar risk factor and outcome associations across surgery type. These results can inform the design of clinical trials in postoperative AKI to the noncardiac surgery setting.
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- Haarhaus, Mathias, et al.
(author)
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Bone Alkaline Phosphatase Isoforms in Hemodialysis Patients With Low Versus Non-Low Bone Turnover: A Diagnostic Test Study
- 2015
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In: American Journal of Kidney Diseases. - : Elsevier. - 0272-6386 .- 1523-6838. ; 66:1, s. 99-105
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Journal article (peer-reviewed)abstract
- Background: Renal osteodystrophy encompasses the bone histologic abnormalities seen in patients with chronic kidney disease (CKD). The bone-specific alkaline phosphatase (bALP) isoform B1x is exclusively found in serum of some patients with CKD. Study Design: The aim of this cross-sectional diagnostic test study was to examine the relationship between serum bALP isoform activity and histomorphometric parameters of bone in patients with CKD receiving maintenance hemodialysis. Settings and Participants: Anterior iliac crest bone biopsy samples from 40 patients with CKD were selected on the basis of bone turnover for histomorphometric analysis. There were samples from 20 patients with low and 20 with non-low bone turnover. Index Test: In serum, bALP, bALP isoforms (B/I, B1x, B1, and B2), and parathyroid hormone (PTH) were measured. Reference Test: Low bone turnover was defined by mineral apposition rate, 0.36 mu m/d. Non-low bone turnover was defined by mineral apposition rate greater than= 0.36 mu m/d. Other Measurements: PTH. Results: B1x was found in 21 patients (53%) who had lower median levels of bALP, 18.6 versus 46.9 U/L; B/I, 0.10 versus 0.22 mu kat/L; B1, 0.40 versus 0.88 mu kat/L; B2, 1.21 versus 2.66 mu kat/L; and PTH, 49 versus 287 pg/mL, compared with patients without B1x (P less than 0.001). 13 patients (65%) with low bone turnover and 8 patients (40%) with non-low bone turnover (P less than 0.2) had detectable B1x. B1x correlated inversely with histomorphometric parameters of bone turnover. Receiver operating characteristic curves showed that B1x can be used for the diagnosis of low bone turnover (area under the curve [AUC], 0.83), whereas bALP (AUC, 0.89) and PTH (AUC, 0.85) are useful for the diagnosis of non-low bone turnover. Limitations: Small number of study participants. Requirement of high-performance liquid chromatography methods for measurement of B1x. Conclusions: B1x, PTH, and bALP have similar diagnostic accuracy in distinguishing low from non-low bone turnover. The presence of B1x is diagnostic of low bone turnover, whereas elevated bALP and PTH levels are useful for the diagnosis of non-low bone turnover.
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- Harari, Florencia, 1986, et al.
(author)
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Blood Lead Levels and Decreased Kidney Function in a Population-Based Cohort
- 2018
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In: American Journal of Kidney Diseases. - : Elsevier BV. - 0272-6386. ; 72:3, s. 381-389
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Journal article (peer-reviewed)abstract
- Background: Environmental lead exposure has been associated with decreased kidney function, but evidence from large prospective cohort studies examining low exposure levels is scarce. We assessed the association of low levels of lead exposure with kidney function and kidney disease. Study Design: Prospective population-based cohort. Setting & Participants: 4,341 individuals aged 46 to 67 years enrolled into the Malmö Diet and Cancer Study-Cardiovascular Cohort (1991-1994) and 2,567 individuals subsequently followed up (2007-2012). Predictor: Blood lead concentrations in quartiles (Q1-Q4) at baseline. Outcomes: Change in estimated glomerular filtration rate (eGFR) between the baseline and follow-up visit based on serum creatinine level alone or in combination with cystatin C level. Chronic kidney disease (CKD) incidence (185 cases) through 2013 detected using a national registry. Measurements: Multivariable-adjusted linear regression models to assess associations between lead levels and eGFRs at baseline and follow-up and change in eGFRs over time. Cox regression was used to examine associations between lead levels and CKD incidence. Validation of 100 randomly selected CKD cases showed very good agreement between registry data and medical records and laboratory data. Results: At baseline, 60% of study participants were women, mean age was 57 years, and median lead level was 25 (range, 1.5-258) μg/L. After a mean of 16 years of follow-up, eGFR decreased on average by 6 mL/min/1.73 m2 (based on creatinine) and 24 mL/min/1.73 m2 (based on a combined creatinine and cystatin C equation). eGFR change was higher in Q3 and Q4 of blood lead levels compared with Q1 (P for trend = 0.001). The HR for incident CKD in Q4 was 1.49 (95% CI, 1.07-2.08) compared with Q1 to Q3 combined. Limitations: Lead level measured only at baseline, moderate number of CKD cases, potential unmeasured confounding. Conclusions: Low-level lead exposure was associated with decreased kidney function and incident CKD. Our findings suggest lead nephrotoxicity even at low levels of exposure.
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- Hellstrom, L, et al.
(author)
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Cadmium exposure and end-stage renal disease
- 2001
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In: American journal of kidney diseases : the official journal of the National Kidney Foundation. - : Elsevier BV. - 1523-6838. ; 38:5, s. 1001-1008
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Journal article (peer-reviewed)
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50. |
- Hellström, L, et al.
(author)
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Cadmium exposure and end-stage renal disease
- 2001
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In: American Journal of Kidney Diseases. - 0272-6386 .- 1523-6838. ; 38:5, s. 1001-1008
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Journal article (peer-reviewed)abstract
- Environmental exposure to cadmium may cause kidney damage and tubular proteinuria. We investigated the relationship between low-level cadmium exposure and end-stage renal disease (ESRD), indicated by renal replacement therapy (RRT), in a Swedish population environmentally or occupationally exposed to cadmium. Based on records of all persons in the population previously or presently employed in cadmium-battery production or residing in cadmium-polluted areas near the battery plants, we defined exposure as high (occupational), moderate (domicile < 2 km from a plant), low (domicile 2 to 10 km from a plant), or no exposure (domicile > 10 km from a plant). Comprehensive data were available for all individuals undergoing RRT since 1978. The annual incidence of RRT increased from 41 per million in the age group 20 to 29 years to 243 per million in the age group 70 to 79 years and was greater in a priori-defined populations with cadmium exposure. Adjusting for age and sex gave an increased Mantel-Haenszel rate ratio (MH-RR) of 1.8 (95% confidence interval [CI], 1.3 to 2.3) for RRT in the cadmium-exposed population compared with the unexposed group, the MH-RR was even higher for women (MH-RR, 2.3, 95% CI, 1.5 to 3.5). Directly age-standardized rate ratios for RRT and cadmium exposure increased from 1.4 (95% CI, 0.8 to 2.0) in the low-exposure group to 1.9 (95% CI, 1.3 to 2.5) and 2.3 (95% CI, 0.6 to 6.0) in the moderate- and high-exposure groups, respectively. We conclude that exposure to occupational or relatively low environmental levels of cadmium appears to be a determinant for the development of ESRD. ⌐ 2001 by the National Kidney Foundation, Inc.
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