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Lameire N, Van Biesen W, Vanholder R. The Role of Peritoneal Dialysis as First Modality in an Integrative Approach to Patients with End-Stage Renal Disease. Perit Dial Int 2020. [DOI: 10.1177/089686080002002s26] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Norbert Lameire
- Renal Division, Department of Internal Medicine, University Hospital, Gent, Belgium
| | - Wim Van Biesen
- Renal Division, Department of Internal Medicine, University Hospital, Gent, Belgium
| | - Raymond Vanholder
- Renal Division, Department of Internal Medicine, University Hospital, Gent, Belgium
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Port FK. Description and Clinical Outcomes of Peritoneal Dialysis: Analyses from the United States Renal Data System. Perit Dial Int 2020. [DOI: 10.1177/089686080002002s22] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Abstract
Objective Few data are available about elderly patients on peritoneal dialysis (PD). In the present study, we reviewed our experience with patients aged 70 years or more at the start of peritoneal dialysis (PD). Design This retrospective study was conducted at a single center in Japan. Patients and Methods Of 222 patients managed using PD at our hospital between 1991 and 2001 (including 219 cases of PD first), 150 patients were aged under 70 years and 72 patients were 70 years of age or older. For the two groups of patients, we determined clinical data, erythropoietin and PD prescriptions, reasons for selecting PD (elderly patients only), urine and ultrafiltration volumes, comprehensive functional assessment, quality of life (QOL), comorbidity, technique survival rate, and causes of death. Results Serum creatinine, serum β2-microglobulin, total dose of erythropoietin (EPO) needed to maintain hematocrit at 30%, number of continuous ambulatory peritoneal dialysis (CAPD) exchanges, and total volume of dialysis solution prescribed were significantly lower in the elderly patients as compared with patients aged under 70 years. The main reasons for starting PD in elderly patients at our hospital were advanced age (57%), patient's choice (25%), and cardiovascular complications (9%). Residual renal function was well maintained in CAPD patients aged 70 years or more as compared with patients aged under 70 years. Ultrafiltration volume was lower in the elderly CAPD patients. Scores on the Revised Hasegawa Dementia Scale, the Physical Self-Maintenance Scale, and the Instrumental Activities of Daily Living scale were significantly higher in CAPD patients than in hemodialysis patients. Subjective assessment using a linear analog scale showed a high QOL score in the elderly patients for overall feelings of well-being, mood, and anxiety. At the time of dialysis introduction, the major existing disorders in patients over 80 years of age were mostly cardiovascular disorders such as heart failure, myocardial infarction, serious arrhythmia, and cerebrovascular disease. The median technique survival in patients aged 70 years or more was 31.5 months. The main causes of death in elderly PD patients were heart failure (35.7%), peritonitis (14.3%), and cerebrovascular disease (11.9%). Conclusion Peritoneal dialysis should be considered the treatment method of choice when introducing dialysis in elderly patients.
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Affiliation(s)
- Makoto Hiramatsu
- Department of Nephrology, Okayama Saiseikai General Hospital, Okayama, Japan
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Schaubel DE, Morrison HI, Fenton SS. Comparing Mortality Rates on Capd/Ccpd and Hemodialysis the Canadian Experience: Fact or Fiction? Perit Dial Int 2020. [DOI: 10.1177/089686089801800504] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
← Objective To compare mortality rates on hemodialysis (HD) to rates on continuous ambulatory/cyclic peritoneal dialysis (CAPD/CCPD), to contrast our results with those of other recent investigations, and to discuss reasons for discrepancies. ← Data Sources Patient -specific data obtained from the Canadian Organ Replacement Register on patients initiating renal replacement therapy (RRT) between 1 January 1990 and 31 December 1995 (n = 14483). Recent mortality comparisons of CAPD and HD. ← Main Outcome Measures Mortality rate ratio (RR) based on “as-treated” (AT) analysis incorporating treatment modality switches and adjusting for age, primary renal diagnosis, and comorbid conditions using Poisson regression. Hazard ratios (HR) were estimated using Cox regression and based on an “intent-to-treat” (ITT) analysis wherein patients were classified based on dialytic modality received on follow-up day 90. ← Results Adjusted mortality rates were significantly decreased on CAPD/CCPD relative to HD [RR = 0.73, 95% confidence interval (CI) = (0.69, 0.77)] based on the AT analysis. Most of the protective effect of CAPD/CCPD was concentrated in the first 2 years of follow-up post-RRT initiation. Based on the ITT analysis, the estimated CAPD/ CCPD effect was greatly reduced, with HR = 0.93 (0.87, 0.99). ← Conclusions We provide further evidence that CAPD/ CCPD is not an inferior dialytic modality to HD, particularly in the short term. Comparing mortality rates on CAPD/ CCPD and HD is inherently difficult due to the potential for bias. Discrepancies between our results and those of previous investigations, and variability in findings among previous studies, relate to differences in clinical and demographic setting, patient populations, study design, statistical methods, and interaction between the dialytic modality effect and various other covariables.
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Affiliation(s)
| | | | - Stanley S.A. Fenton
- Division of Nephrology, Department of Medicine, The Toronto Hospital, University of Toronto, Toronto, Ontario, Canada
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Port FK, Webb R, Wolfe RA, Held PJ. The USRDS Role in Enhancing End-Stage Renal Disease Research: Interpretation of Research and Sharing of Analysis Files. Semin Dial 2007. [DOI: 10.1111/j.1525-139x.1998.tb00305.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Song YS, Jung H, Shim J, Oh C, Shin GT, Kim H. Survival analysis of Korean end-stage renal disease patients according to renal replacement therapy in a single center. J Korean Med Sci 2007; 22:81-8. [PMID: 17297256 PMCID: PMC2693574 DOI: 10.3346/jkms.2007.22.1.81] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study was to investigate clinical characteristics and any differential trends in survival among renal replacement therapy (hemodialysis [HD], peritoneal dialysis [PD], and kidney transplantation [KT]) in Korean end-stage renal disease (ESRD) population. We tried to analyze retrospectively the survival rate adjusted by risk factors and the relative risk stratified by key risk factors among 447 ESRD patients who began dialysis or had a kidney transplant at Ajou University Hospital from 1994 to 2004. In adjusted Cox survival curves, the KT patients had the best survival rate, and the HD patients had better survival than PD patients. The consistent trends in different subgroups stratified by age and diabetes were as following: 1) The risk of death for PD and HD was not proportional over time, 2) The relative risk of PD was similar or lower than that of HD for the first 12 months, but it became higher at later period. The significant predictors for mortality were age (over 55 yr), presence of diabetes, cerebrovascular accident at ESRD onset, and more than one time of hospitalization caused by malnutrition. Further large-scaled, multicenter-based comparative study is needed in Korean ESRD patients and more meticulous attention is required in high-risk patients.
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Affiliation(s)
- Young-Soo Song
- Department of Internal Medicine, Hallym University College of Medicine, Seoul, Korea
| | - Heesun Jung
- Department of Nephrology, Ajou University School of Medicine, Suwon, Korea
| | - Jinyoung Shim
- Department of Nephrology, Ajou University School of Medicine, Suwon, Korea
| | - Changkwon Oh
- Department of Surgery, Ajou University School of Medicine, Suwon, Korea
| | - Gyu-Tae Shin
- Department of Nephrology, Ajou University School of Medicine, Suwon, Korea
| | - Heungsoo Kim
- Department of Nephrology, Ajou University School of Medicine, Suwon, Korea
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Abstract
Nearly all published reports and clinical studies of hemodialysis solute kinetics are confined to thrice-weekly dialysis schedules. Over the past 40 years, clinical experience with dialysis treatments given three times per week has expanded enormously, but it was not until the Hemodialysis (HEMO) study results were revealed that nephrologists became fully aware of the limits of usefulness of infrequent dialysis. In light of continued reports of improved quality of life and survival with daily dialysis, it appears that the limits of thrice-weekly dialysis may be extended when treatments are given more often. Analysis of solute kinetics during and between dialyses supports the notion that a more frequent schedule delivers more efficient dialysis and that methods can be developed to allow a comparison of risks among patients treated 3-7 days per week. One such method, based on the concept of solute seclusion, suggests that at the currently established minimum standard dose, approximately 50% of the improvement in solute control afforded by seven treatments per week is achieved by increasing the frequency to four treatments per week. The same model shows that seven treatments per week afford an improvement in solute control that is approximately 80% as effective as continuous dialysis. These conclusions are similar to those derived from a completely different model based on peak concentration toxicity. Neither of these models has been clinically tested, so caution must be advised when treating individual patients.
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Affiliation(s)
- Thomas A Depner
- Department of Medicine, Nephrology Division, University of California-Davis, 4150 V Street, Suite 3500, Sacramento, CA 95817, USA.
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Ting GO, Kjellstrand C, Freitas T, Carrie BJ, Zarghamee S. Long-term study of high-comorbidity ESRD patients converted from conventional to short daily hemodialysis. Am J Kidney Dis 2003; 42:1020-35. [PMID: 14582046 DOI: 10.1016/j.ajkd.2003.07.020] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Conventional hemodialysis (CHD) is associated with suboptimal clinical outcomes and high mortality rates. Daily hemodialysis (DHD) has been reported to improve outcomes and quality of life (QOL), predominantly in self-care or home dialysis populations. The effect of short DHD (sDHD) on patients with end-stage renal disease (ESRD) with high comorbidities has not been established. METHODS This prospective study compared clinical outcomes and QOL in high-comorbidity patients with ESRD converted from CHD to sDHD while maintaining the same total weekly dialysis time. Study patients had 4.0 +/- 1.7 major comorbid conditions in addition to ESRD. Standard dialysis parameters, antihypertensive and erythropoietin (EPO) requirements, Kidney Disease Quality of Life (KDQOL) measurements, vascular access problems, and hospitalization rates were compared while on sDHD therapy versus the previous 12 months on CHD therapy. RESULTS Forty-two patients were studied on sDHD therapy for 793 patient-months during a 72-month period. During sDHD, standard Kt/V increased 31%, hospitalization days decreased significantly by 34%, and vascular access problems did not increase. Cumulative survival was 33% at 6 years. In the 20 patients who remained on sDHD therapy for 12 months, after 1 year, we found significant improvements in KDQOL scores, a 69% reduction in antihypertensive medications with stable blood pressure, and a 45% reduction in EPO requirements with stable hematocrits. We hypothesize that these improvements are the result of the less extreme solute and fluid fluctuations and greater dialysis dose provided by sDHD, even when weekly dialysis time is unchanged. CONCLUSION High-comorbidity patients with ESRD converted to sDHD therapy had significantly improved clinical outcomes and QOL and decreased hospitalizations, with no increase in vascular access problems.
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Affiliation(s)
- George O Ting
- El Camino Dialysis Services, Mountain View, CA, USA.
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Keough-Ryan T, Hutchinson T, MacGibbon B, Senecal M. Studies of prognostic factors in end-stage renal disease: an epidemiological and statistical critique. Am J Kidney Dis 2002; 39:1196-205. [PMID: 12046031 DOI: 10.1053/ajkd.2002.33391] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We reviewed prognostic studies for patients treated with renal replacement therapy by using an electronic database and bibliographic review for 1990 to 1998. Using the inclusion criteria of English language, adult patients, primary article, minimum 50 patients, primary focus on prognostic factors, and mortality outcome, 104 articles were identified. The 104 articles were reviewed for eight epidemiological and seven statistical criteria that addressed the scientific validity and interpretability of results. The following percentages of the 104 articles satisfied each of the eight epidemiological criteria: (1) a priori hypothesis, 6%; (2) zero time specified, 49%; (3) prognostic factors collected before zero time, 69%; (4) inception cohort, 59%; (5) control for treatment, 74%; (6) operational criteria, 82%; (7) missing variables reported, 12%; and (8) loss to follow-up reported, 42%. Summary analysis showed that 76% of studies satisfied four or fewer of the eight identified criteria. In the 77 articles (74%) that used the Cox proportional hazards model, the following percentages of articles met each of the seven statistical criteria: (1) proportional hazards verified, 26%; (2) censoring explained, 57%; (3) multivariate analysis performed, 91%; (4) significance levels given, 99%; (5) age adjusted, 95%; (6) diabetes adjusted, 66%; and (7) cardiac adjusted, 44%. Summary analysis found that 47% of the 77 studies satisfied four or fewer of the seven identified criteria. Superficially, results appear to show that when the Cox proportional hazards model was used, statistical analysis was better than the epidemiological design. However, studies we examined had serious defects in both epidemiological design and statistical analysis. The consequent validity of results for the quantification of prognostic factors is questionable.
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Affiliation(s)
- Tammy Keough-Ryan
- Department of Medicine, Division of Nephrology, Dalhousie University, Halifax, Nova Scotia, Canada.
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Jassal SV, Krishna G, Mallick NP, Mendelssohn DC. Attitudes of British Isles nephrologists towards dialysis modality selection: a questionnaire study. Nephrol Dial Transplant 2002; 17:474-7. [PMID: 11865095 DOI: 10.1093/ndt/17.3.474] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Dialysis demographics are changing around the world. Within the UK a striking decrease in the overall use of peritoneal dialysis (PD) has been noted. We set out to determine the opinions and attitudes of British Isles nephrologists about dialysis modality decisions and optimal dialysis system design. METHODS A survey questionnaire was mailed to a random selection of members of the Renal Association of Great Britain and Ireland. RESULTS A 63% response rate was achieved. Decisions about dialysis modality were based mostly on patient preference (mean score 4.4 on a scale of 1-5), quality of life data (mean score 3.8), and morbidity and mortality data (mean scores for both 3.6). The least important factors when choosing the modality of dialysis care were the treatment costs to either the patient or the health care system. Respondents felt that both PD and hospital-based haemodialysis (HD) were over-utilized in today's practice. They suggested that an 'ideal dialysis system' (based on patient survival, wellness, and quality of life) should have 27% of patients dialysed using hospital-based HD, 24% in a satellite unit, 11% dialysed using home HD, and 38% on some form of PD (19, 16, and 3% for CAPD, automated PD and intermittent PD, respectively). Few differences were identified between an ideal system which optimized patient survival, wellness, and quality of life, compared with one which optimized cost-effectiveness. CONCLUSION This survey suggests that most nephrologists in the British Isles feel that hospital-based HD and CAPD are being currently overused, and that future dialysis planning should include a higher proportion of patients on satellite dialysis, home HD, and automated PD to optimize both dialysis cost-effectiveness and patient outcomes.
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Kutner NG, Zhang R, McClellan WM, Cole SA. Psychosocial predictors of non-compliance in haemodialysis and peritoneal dialysis patients. Nephrol Dial Transplant 2002; 17:93-9. [PMID: 11773470 DOI: 10.1093/ndt/17.1.93] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Non-compliance with prescribed therapy significantly impacts dialysis patient care and outcomes. The underlying psychosocial issues leading to non-compliance are not well understood, especially in peritoneal dialysis (PD) patients. METHODS A multicentre cohort of 119 haemodialysis (HD) patients and 51 PD patients was studied. In-person interviews were conducted with patients and clinical and laboratory data were obtained from medical records. Missed and shortened dialysis treatments/sessions and excessive serum phosphate values provided indicators of non-compliance. Patients' perceived health status, perceived self-health care, depression, perceived control over future health, social support, and disease-specific perceived quality of life were measured, along with current smoking status. Associations of predictor variables with non-compliance indicators were examined in univariate and multivariable analyses. RESULTS Approximately one-third of both HD and PD patients were non-compliant on at least one indicator. Logistic regression models identified a significant association between smoking and each non-compliance indicator. Patient age (younger) also predicted missed treatments. Perceived (negative) effects of kidney disease on daily life, and (decreased) perceived control over future health also predicted shortened treatments. No significant association was found between dialysis modality (HD vs PD) and non-compliance. CONCLUSION Smoking, one marker of priority placed on health status, and intrusiveness/control issues should be addressed in intervention efforts to improve compliance in patients treated by HD and PD.
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Affiliation(s)
- Nancy G Kutner
- Department of Rehabilitation Medicine, School of Medicine, 1441 Clifton Road NE, Emory University, Atlanta, GA 30322, USA.
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Abstract
Noncompliance with prescribed therapy significantly impacts dialysis patient care and outcome. At least one-half of hemodialysis (HD) patients are likely to be noncompliant with some part of their treatment regimen, and one-third of peritoneal dialysis (PD) patients are believed to miss prescribed exchanges. Psychosocial issues, younger age, and smoking behavior have been linked with compliance problems in multiple studies. Few interventions have been rigorously tested, but patient education and/or individualized attention, supervision, encouragement, and support are widely advocated strategies to improve patient compliance. Areas in need of continued study include psychosocial determinants of compliance in PD as well as HD patients, compliance behavior patterns over time, and the parameters within which dialysis compliance can vary and still achieve specified treatment goals.
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Van Biesen W, Vanholder R, Debacquer D, De Backer G, Lameire N. Comparison of survival on CAPD and haemodialysis: statistical pitfalls. Nephrol Dial Transplant 2000; 15:307-11. [PMID: 10692513 DOI: 10.1093/ndt/15.3.307] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- W Van Biesen
- Renal Division, Department of Internal Medicine and Department of Social Medicine and Epidemiology, University Hospital Gent, Gent, Belgium
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Biesen WVAN, Vanholder RC, Veys N, Dhondt A, Lameire NH. An evaluation of an integrative care approach for end-stage renal disease patients. J Am Soc Nephrol 2000; 11:116-125. [PMID: 10616847 DOI: 10.1681/asn.v111116] [Citation(s) in RCA: 141] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Studies analyzing the outcome of integrative care of end-stage renal disease (ESRD) patients, whereby patients are transferred from one renal replacement modality to another according to individual needs, are scant. In this study, we analyzed 417 files of 223 hemodialysis (HD) and 194 peritoneal dialysis (PD) patients starting renal replacement therapy between 1979 and 1996, to evaluate the effect of such an approach. Analysis was done for survival of patients on their first modality, for intention-to-treat survival (counting total time on renal replacement therapy, but with exclusion of time on transplantation), and for total survival. Log rank analysis was used and correction for risk factors was performed by Cox proportional hazards regression. Intention-to-treat survival and total survival were not different between PD and HD patients (log rank, P > 0.05). Technique success was higher in HD patients compared to PD patients (log rank, P = 0.01), with a success rate after 3 yr of 61 and 48%, respectively. Thirty-five patients were transferred from HD to PD and 32 from PD to HD. Transfer of PD patients to HD was accompanied by an increase in survival compared to those remaining on PD (log rank, P = 0.001), whereas, in contrast, transfer of patients from HD to PD was not (log rank, P = 0.17). Survival of patients remaining more than 48 mo on their initial modality was lower for PD patients (log rank, P < 0.01). A matched-pair analysis between patients who started on PD and who were transferred to HD later (by definition called integrative care patients), and patients who started and remained on HD, showed a survival advantage for the integrative care patients. These results indicate that patient outcome is not jeopardized by starting patients on PD, at least if patients are transferred in a timely manner to HD when PD-related problems arise.
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Affiliation(s)
- Wim VAN Biesen
- Renal Division, Department of Internal Medicine, University Hospital Gent, Belgium
| | - Raymond C Vanholder
- Renal Division, Department of Internal Medicine, University Hospital Gent, Belgium
| | - Nic Veys
- Renal Division, Department of Internal Medicine, University Hospital Gent, Belgium
| | - Annemieke Dhondt
- Renal Division, Department of Internal Medicine, University Hospital Gent, Belgium
| | - Norbert H Lameire
- Renal Division, Department of Internal Medicine, University Hospital Gent, Belgium
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Vonesh EF, Schaubel DE, Hao W, Collins AJ. Statistical methods for comparing mortality among ESRD patients: Examples of regional/international variations. Kidney Int 2000. [DOI: 10.1046/j.1523-1755.2000.07405.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Elinder CG, Jones E, Briggs JD, Mehls O, Mendel S, Piccoli G, Rigden SP, Pinto dos Santos J, Simpson K, Tsakiris D, Vanrenterghem Y. Improved survival in renal replacement therapy in Europe between 1975 and 1992. An ERA-EDTA Registry study. Nephrol Dial Transplant 1999; 14:2351-6. [PMID: 10528657 DOI: 10.1093/ndt/14.10.2351] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The prevalence of Renal Replacement Therapy (RRT) is rising steadily, worldwide and in Europe. One reason for this is an increasing number of patients starting RRT, but improving survival on RRT may also be contributing. MATERIAL AND METHODS In an ERA-EDTA Registry study we have examined survival of patients with Standard Primary Renal Disease, or Diabetes, aged 20 to 75 years, who started RRT with haemodialysis (HD) or peritoneal dialysis (PD) between 1975 and 1992. Altogether close to a quarter of a million patients were included in the analysis which included conventional survival analysis of comparable subgroups of the whole cohort as well as Cox regression. RESULTS After accounting for age, mode of initial treatment, and diagnosis, an improvement in survival of RRT patients was evident. From Cox regression it was calculated the risk for death decreased by about 5% annually during the time period 1975 1992. Patients who started RRT using PD experienced a higher mortality than those starting with HD. According to Cox regression the relative risk ratio for death was 1.25 for the whole period. The difference in survival between patients starting with PD or HD diminished during the observation period (1975-1992). DISCUSSION The survival prospects of a patient presenting with end stage renal disease were considerably better in the early 1990s compared to the mid 1970s. This is reassuring despite the fact that mortality on RRT remains high. The higher mortality of RRT patients who started with PD is probably an 'historical' observation as the techniques of this treatment modality have improved considerably since the 1980s which was the time period from which came most of the data for the analysis.
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Affiliation(s)
- C G Elinder
- Department of Renal Medicine, Huddinge University Hospital and Karolinska Institute, Sweden
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