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Predialysis nephrology care of older patients approaching end-stage renal disease.

ABSTRACT: Little is known about trends in the timing of first nephrology consultation and associated outcomes among older patients initiating dialysis.Data from patients aged 67 years or older who initiated dialysis in the United States between January 1, 1996, and December 31, 2006, were stratified by timing of the earliest identifiable nephrology visit. Trends of earlier nephrology consultation were formally examined in light of concurrently changing case mix and juxtaposed with trends in 1-year mortality rates after initiation of dialysis.Among 323,977 older patients initiating dialysis, the proportion of patients receiving nephrology care less than 3 months before initiation of dialysis decreased from 49.6% (in 1996) to 34.7% (in 2006). Patients initiated dialysis with increasingly preserved kidney function, from a mean estimated glomerular filtration rate of 8 mL/min/1.73 m(2) in 1996 to 12 mL/min/1.73 m(2) in 2006. Patients were less anemic in later years, which was partly attributable to increased use of erythropoiesis-stimulating agents, and fewer used peritoneal dialysis as the initial modality. During the same period, crude 1-year mortality rates remained unchanged (annual change in mortality rate, +0.2%; 95% confidence interval, 0% to +0.4%). Adjustment for changes in demographic and comorbidity patterns yielded estimated annual reductions in 1-year mortality rates of 0.9% (95% confidence interval, 0.7% to 1.1%), which were explained only partly by concurrent trends toward earlier nephrology consultation (annual mortality reduction after accounting for timing of nephrology care was attenuated to 0.4% [0.2% to 0.6%]).Despite significant trends toward earlier use of nephrology consultation among older patients approaching maintenance dialysis, we observed no material improvement in 1-year survival rates after dialysis initiation during the same time period.

SUBMITTER: Winkelmayer WC

PROVIDER: S-EPMC4123329 | biostudies-literature | 2011 Aug

REPOSITORIES: biostudies-literature

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Predialysis nephrology care of older patients approaching end-stage renal disease.

Winkelmayer Wolfgang C WC Liu Jun J Chertow Glenn M GM Tamura Manjula Kurella MK

Archives of internal medicine 20110801 15

<h4>Background</h4>Little is known about trends in the timing of first nephrology consultation and associated outcomes among older patients initiating dialysis.<h4>Methods</h4>Data from patients aged 67 years or older who initiated dialysis in the United States between January 1, 1996, and December 31, 2006, were stratified by timing of the earliest identifiable nephrology visit. Trends of earlier nephrology consultation were formally examined in light of concurrently changing case mix and juxta ...[more]

PMID: 21824952

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Project description:Anemia is common in patients with advanced chronic kidney disease. Whereas the treatment of anemia in patients with end-stage renal disease (ESRD) has attracted considerable attention, relatively little is known about patterns and trends in the anemia care received by patients before they start maintenance dialysis or undergo preemptive kidney transplantation.To determine the trends in anemia treatment received by Medicare beneficiaries approaching ESRD.Closed cohort study in the United States using national ESRD registry data (US Renal Data System) of patients 67 years or older who initiated maintenance dialysis or underwent preemptive kidney transplantation between 1995 and 2010. All eligible patients had uninterrupted Medicare (A+B) coverage for at least 2 years before ESRD.Time, defined as calendar year of incident ESRD.Use of erythropoiesis-stimulating agents (ESA), intravenous iron supplements, and blood transfusions in the 2 years prior to ESRD; hemoglobin concentration at the time of ESRD. We used multivariable modified Poisson regression to estimate utilization prevalence ratios (PRs).Records of 466,803 patients were analyzed. The proportion of patients with incident ESRD receiving any ESA in the 2 years before increased from 3.2% in 1995 to a peak of 40.8% in 2007; thereafter, ESA use decreased modestly to 35.0% in 2010 (compared with 1995; PR, 9.85 [95% CI, 9.04-10.74]). Among patients who received an ESA, median time from first recorded ESA use to ESRD increased from 120 days in 1995 to 337 days in 2010. Intravenous iron administration increased from 1.2% (1995) to 12.3% (2010; PR, 9.20 [95% CI, 7.97-10.61]). The proportion of patients receiving any blood transfusions increased monotonically from 20.6% (1995) to 40.3% (2010; PR, 1.88 [95% CI, 1.82-1.95]). Mean hemoglobin concentrations were 9.5 g/dL in 1995, increased to a peak of 10.3 g/dL in 2006, and then decreased moderately to 9.9 g/dL in 2010.Between 1995 and 2010, older adults approaching ESRD were increasingly more likely to be treated with ESAs and to receive intravenous iron supplementation, but also more likely to receive blood transfusions.

Project description:ImportanceMedicare beneficiaries with end-stage renal disease (ESRD) are a medically complex group accounting for less than 1% of the Medicare population but more than 7% of Medicare fee-for-service payments.ObjectiveTo evaluate the association of the Comprehensive End-Stage Renal Disease Care (CEC) model with Medicare payments, health care use, and quality of care.Design, setting, and participantsIn this economic evaluation, a difference-in-differences design estimated the change in outcomes for 73 094 Medicare fee-for-service beneficiaries aligned to CEC dialysis facilities between the baseline (from January 2014 to March 2015) and intervention periods (from October 2015 to December 2017) relative to 60 464 beneficiaries at matched dialysis facilities. In the CEC model, dialysis facilities, nephrologists, and other providers partner to form ESRD Seamless Care Organizations (ESCOs), specialty-oriented accountable care organizations that coordinate care for beneficiaries with ESRD. ESCOs with expenditures below a benchmark set by the Centers for Medicare & Medicaid Services are eligible to share in savings if they meet quality thresholds. A total of 685 dialysis facilities affiliated with 37 ESCOs participated in the CEC model as of January 2017. Thirteen ESCOs joined the CEC model on October 1, 2015 (wave 1), and 24 ESCOs joined on January 1, 2017 (wave 2). Patients with ESRD who were aligned with CEC dialysis facilities were compared with patients at matched dialysis facilities.Main outcomes and measuresMedicare total and service-specific payments per beneficiary per month; hospitalizations, readmissions, and emergency department visits; and select quality measures.ResultsRelative to the comparison group (n = 60 464; 55% men; mean [SD] age, 63.5 [14.4] years), total Medicare payments for CEC beneficiaries (n = 73 094; 56% men; mean [SD] age, 63.0 [14.4] years) decreased by $114 in payments per beneficiary per month (95% CI, -$202 to -$26; P = .01), associated primarily with decreases in payments for hospitalizations and readmissions. Payment reductions were offset by shared savings payments to ESCOs, resulting in net losses of $78 in payments per beneficiary per month (95% CI, -$8 to $164; P = .07). Relative to the comparison group, CEC beneficiaries had 5.01 fewer hospitalizations per 1000 beneficiaries per month (95% CI, -8.45 to -1.56; P = .004), as well as fewer catheter placements (CEC beneficiaries with catheter as vascular access for periods longer than 90 days decreased by 0.78 percentage points [95% CI, -1.36 to -0.19; P = .01]) and fewer hospitalizations for ESRD complications (CEC beneficiaries were 0.11 percentage points less likely [95% CI, -0.20 to -0.02; P = .01] to be hospitalized in a given month). Total dialysis sessions and payments increased, suggesting improved adherence to dialysis treatments.Conclusions and relevanceEarly findings from the CEC model demonstrate that a specialty accountable care organization model focused on a particular population was associated with reduced payments and improved quality of care. Future research can assess the longer-term outcomes of the CEC model and its applicability to populations with other complex chronic conditions.

Project description:BackgroundPrevious studies have demonstrated that early pre-end-stage renal disease (ESRD) nephrology care could improve postdialysis prognosis. However, less is known about the specific types of interventions responsible for the improved outcomes. We hypothesized that more frequent predialysis laboratory testing is associated with better postdialysis outcomes in incident ESRD patients.MethodsIn all, 23?089 patients with available outpatient laboratory tests performed during the 2-year predialysis (i.e. prelude) period were identified from a total of 52?172 American veterans with chronic kidney disease (CKD) transitioning to dialysis between October 2007 and September 2011. The associations between the frequency of combined laboratory tests, including serum creatinine, serum potassium and hemoglobin (test trio), with postdialysis mortality and hospitalization were examined in multivariable adjusted Cox and logistic regression models.ResultsWhen entering the 2-year prelude period, the mean age (Standard Deviation) of the patients was 66.2 (SD 11.3)?years and the mean estimated glomerular filtration rate was 46.8 (SD 23.9)?mL/min/1.73 m2. In all, 14% of patients had the test trio performed less than twice in 24?months and 8.9% had the trio measured more often than every other month. Over a 2.5-year median postdialysis follow-up period, 15?303 (66.3%) patients died (mortality rate 260/1000 patient-years). The adjusted hazard ratio of all-cause mortality and adjusted odds ratio of the composite of hospitalization or death associated with lab testing done >12/24?months compared with 2-?4/24 months were 0.68 [95% confidence interval (CI) 0.65-0.73] and 0.70 (95% CI 0.62-0.79), respectively.ConclusionsMore frequent laboratory testing in patients with advanced CKD is associated with better clinical outcomes after dialysis. Further examination in clinical trials is needed before the implementation of more frequent laboratory testing in clinical practice.

Project description:The transition from CKD to ESRD can be particularly unstable, with high rates of death and hospitalizations. Few studies have examined medication use during this critical period. We examined patterns of antihypertensive medication use from the four quarters before and eight quarters after incident ESRD treated with maintenance dialysis.We used the US Renal Data System to identify patients aged ?67 years initiating dialysis for ESRD between January 2008 and December 2010 with Medicare Part D and a low-income subsidy. We ascertained the incidence of AKI and hyperkalemia during each quarter on the basis of having at least 1 payment claim for the condition. We used Poisson regression with robust SEMs to formally test for changes in the trend and level of antihypertensive medication use in a series of intervention analyses.The number of antihypertensive drugs used increased as patients neared ESRD, peaking at an average of 3.4 in the quarter immediately preceding dialysis initiation, then declining to 2.2 medications by 2 years later. Angiotensin-converting enzyme inhibitor/angiotensin II receptor blocker use was stable at approximately 40%, even among patients with coronary disease and systolic heart failure, and did not correlate with AKI or hyperkalemia. Dialysis initiation was associated with a 40% (95% confidence interval, 38% to 43%) lower adjusted level of diuretic use, which continued to decline after ESRD. Three- and four-drug combinations that included a diuretic were most common before ESRD, whereas after ESRD, one- and two-drug ?-blocker or calcium-channel blocker-based combinations were most common.The use of antihypertensive medications, particularly angiotensin-converting enzyme inhibitor/angiotensin II receptor blockers and diuretics, may be suboptimal during the transition from CKD to ESRD, especially in patients with coronary disease or systolic heart failure. Future studies are needed to identify strategies to increase the appropriate use of antihypertensive medications during this critical transition period.

Project description:OBJECTIVE:Serum albumin is a marker of malnutrition and inflammation and has been demonstrated as a strong predictor of mortality in chronic kidney disease (CKD) and end-stage renal disease (ESRD) patients. Yet, whether serum albumin levels in late-stage CKD are associated with adverse outcomes after the transition to ESRD is unknown. We hypothesize that lower levels and a decline in serum albumin in late-stage CKD are associated with higher risk of mortality and hospitalization rates 1 year after transition to ESRD. DESIGN AND METHODS:This retrospective cohort study included 29,124 US veterans with advanced CKD transitioning to ESRD between 2007 and 2015. We evaluated the association of pre-ESRD (91 days before transition) serum albumin with 12-month post-ESRD all-cause, cardiovascular, and infection-related mortalities and hospitalization rates as well as the association of 1-year pre-ESRD albumin slope and 12-month post-ESRD mortality using hierarchical multivariable adjustments. RESULTS:There was a negative linear association between serum albumin and all-cause mortality, such that risk doubled (hazard ratio [HR]: 2.07, 95% confidence interval [CI]: 1.87, 2.28) for patients with the lowest serum albumin <2.8 g/dL (ref: ?4.0 g/dL) after full adjustment. A consistent relationship was observed between serum albumin and cardiovascular and infection-related mortality, and hospitalization outcomes. An increase in serum albumin of >0.25 g/dL/year was associated with reduced mortality risk (HR: 0.76, 95% CI: 0.63, 0.91) compared with a slight decline in albumin (ref: >-0.25 to 0 g/dL/year), whereas a decline more than 0.5 g/dL/year was associated with a 55% higher risk in mortality (HR: 1.55, 95% CI: 1.43, 1.68) in fully adjusted models. CONCLUSIONS:Lower pre-ESRD serum albumin was associated with higher post-ESRD all-cause, cardiovascular, and infection-related mortalities and hospitalization rates. Declining serum albumin levels in the pre-ESRD period were also associated with worse 12-month post-ESRD mortality.

Dataset Information

Predialysis nephrology care of older patients approaching end-stage renal disease.

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Predialysis nephrology care of older patients approaching end-stage renal disease.

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