Abstract
Although chronic kidney disease (CKD) has a high mortality rate, the estimation of CKD mortality burden in the general population may be challenging because CKD is not always listed as a cause of death in mortality registries. To overcome this limitation, relative survival was used to estimate the excess mortality attributable to CKD as compared to the general population using data of patients registered in the Prevenzione Insufficienza Renale Progressiva (PIRP) registry since 2005 and were followed up until 2013. Relative survival was the ratio of survival observed in CKD patients to the expected survival of the general population. Multivariate parametric survival analysis was used to identify factors predicting excess mortality. The relative survival of CKD patients at 9 years was 0.708. Survival was significantly lower in CKD patients with cardiovascular comorbidities, proteinuria, diabetes, anemia and high phosphate levels and in advanced CKD stages, males, older patients and those who underwent dialysis. Relative survival is a viable method to determine mortality attributable to CKD. Study limitations are that patients are representative only of CKD patients followed by nephrologists and that our follow-up duration may be relatively short as a model for mortality.
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References
Neovius M, Jacobson SH, Eriksson JK et al (2014) Mortality in chronic kidney disease and renal replacement therapy: a population-based cohort study. BMJ Open 4:e004251
Go AS, Chertow GM, Fan D et al (2004) Chronic kidney disease and the risks of death, cardiovascular events, and hospitalization. N Engl J Med 13:1296–1305
Elie C, De Rycke Y, Jais J, Landais P (2011) Appraising relative and excess mortality in population-based studies of chronic diseases such as end-stage renal disease. Clin Epidemiol 3:157–169
Tangri N, Kitsios GD, Inker LA, et al. (2013) Risk prediction models for patients with chronic kidney disease. Ann Intern Med 8:596–603
Gebhart J, Posch F, Koder S et al (2015) Increased mortality in patients with the lupus anticoagulant : the Vienna lupus anticoagulant and thrombosis study (LATS). Blood 125:3477–3484
Davis JS, He V, Anstey NM, Condon JR (2014) Long term outcomes following hospital admission for sepsis using relative survival analysis: a prospective cohort study of 1092 patients with 5 year follow up. PLoS One 9:e112224
Nelson CP, Lambert PC, Squire IB, Jones DR (2008) Relative survival: what can cardiovascular disease learn from cancer? Eur Heart J 29:941–947
Rucci P, Mandreoli M, Gibertoni D et al (2014) A clinical stratification tool for chronic kidney disease progression rate based on classification tree analysis. Nephrol Dial Transplant 29:603–610
World Health Organization BMI Classification. http://apps.who.int/bmi/index.jsp?introPage = intro_3.html. Accessed 7 Nov 2014
Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group (2013) KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney inter, Suppl 3:1–150
Ederer F, Axtell L, Cutler S (1961) The relative survival rate: a statistical methodology. Natl Cancer Inst Monogr 6:101–121
ISTAT (2014) Italian Population Life Tables. http://demo.istat.it/unitav2012/index.html?lingua = eng. Accessed 24 Nov 2014
Hakulinen T, Seppä K, Lambert PC (2011) Choosing the relative survival method for cancer survival estimation. Eur J Cancer 47:2202–2210
Tripepi G, Jager KJ, Dekker FW, Zoccali C (2008) Testing for causality and prognosis: etiological and prognostic models. Kidney Int 74:1512–1515
Royston P, Lambert PC (2011) Flexible parametric survival analysis using Stata: beyond the Cox model, First edit. Stata Press, College Station, pp 91–124
Bellasi A, Mandreoli M, Baldrati L et al (2011) Chronic kidney disease progression and outcome according to serum phosphorus in mild-to-moderate kidney dysfunction. Clin J Am Soc Nephrol 6:883–891
Schafer JL, Graham JW (2002) Missing data: our view of the state of the art. Psychol Methods 7:147–177
White IR, Royston P, Wood AM (2011) Multiple imputation using chained equations: issues and guidance for practice. Stat Med 30:377–399
Gondos A, Brenner H (2011) Relative survival of transplant patients: quantifying surplus mortality among renal transplant recipients compared with the general population. Transplantation 92:913–917
Nordio M, Limido A, Maggiore U et al (2012) Survival in patients treated by long-term dialysis compared with the general population. Am J Kidney Dis 59:819–828
Nordio M, Tessitore N, Feriani M et al (2013) Mortality in the Veneto population on renal replacement therapy. J Nephrol 26(Suppl 2):S23–S33
Van Walraven C, Manuel DG, Knoll G (2014) Survival trends in ESRD patients compared with the general population in the United States. Am J Kidney Dis 63:491–499
Santoro A, Mandreoli M (2014) Chronic renal disease and risk of cardiovascular morbidity-mortality. Kidney Blood Press Res 39:142–146
Gullion CM, Keith DS, Nichols GA, Smith DH (2006) Impact of comorbidities on mortality in managed care patients with CKD. Am J Kidney Dis 48:212–220
Chronic Kidney Disease Prognosis Consortium, Matsushita K, van der Velde M et al (2010) Association of estimated glomerular filtration rate and albuminuria with all-cause and cardiovascular mortality in general population cohorts: a collaborative meta-analysis. Lancet 375:2073–2081
Hemmelgarn BR, Manns BJ, Lloyd A et al (2010) Relation between kidney function, proteinuria, and adverse outcomes. JAMA 303:423–429
Eddington H, Hoefield R, Sinha S et al (2010) Serum phosphate and mortality in patients with chronic kidney disease. Clin J Am Soc Nephrol 5:2251–2257
Palmer S, Hayen A, Macaskill P et al (2011) Serum levels of phosphorus, parathyroid hormone, and calcium and risks of death and cardiovascular disease in individuals with chronic kidney disease: a systematic review and meta-analysis. JAMA 305:1119–1127
Singh A, Szczech L, Tang K et al (2006) Correction of anemia with epoetin alfa in chronic kidney disease. N Engl J Med 355:2085–2098
Pfeffer M, Burdmann E, Chen C et al (2009) A trial of darbepoetin alfa in type 2 diabetes and chronic kidney disease. N Engl J Med 361:2019–2032
Acknowledgments
The study was presented at the Poster Session CKD: Epidemiology and Outcomes—III at the ASN Kidney Week 2014 Annual Meeting, November 13-16 in Philadelphia, PA. De Amicis S., Ospedale G. Da Saliceto, Piacenza; David S., Ospedale Maggiore, Parma; Corradini M., Arcispedale S.Maria Nuova, Reggio Emilia; Caruso F., Ospedale Ramazzini, Carpi; Olmeda F., Ospedale Policlinico, Modena; Orsi C., Policlinico S.Orsola-Malpighi, Bologna; Cannarile DC., Policlinico S.Orsola-Malpighi, Bologna; Fantinati C., Ospedale S.Maria della Scaletta, Imola; Russo G., Ospedale S.Anna, Ferrara; Monti M., Ospedale S.Maria delle Croci, Ravenna; Gambaretto C., Ospedale Morgagni Pierantoni, Forlì; Ferri B., Ospedale Bufalini, Cesena; Flachi M., Ospedale degli Infermi, Rimini
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On behalf of all authors, the corresponding author states that there is no conflict of interest. The authors declare that no support was received for the current study.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Gibertoni, D., Mandreoli, M., Rucci, P. et al. Excess mortality attributable to chronic kidney disease. Results from the PIRP project. J Nephrol 29, 663–671 (2016). https://doi.org/10.1007/s40620-015-0239-4
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DOI: https://doi.org/10.1007/s40620-015-0239-4