• Am. J. Nephrol. · Jan 2008

    Competing risk factor analysis of end-stage renal disease and mortality in chronic kidney disease.

    • Rajiv Agarwal, Zerihun Bunaye, Dagim M Bekele, and Robert P Light.
    • Division of Nephrology, Department of Medicine, Indiana University School of Medicine, and Richard L. Roudebush VA Medical Center, Indianapolis, IN 46202, USA. ragarwal@iupui.edu
    • Am. J. Nephrol. 2008 Jan 1; 28 (4): 569-75.

    BackgroundDeath and dialysis are competing outcomes in patients with chronic kidney disease (CKD). The factors associated with end-stage renal disease (ESRD) versus death in this population are unknown. The purpose of our study was to evaluate the competing risk of ESRD versus mortality and to evaluate the risk factors associated with these two outcomes.MethodsWe prospectively recruited 220 consecutive patients at a Veterans Administration Medical Center attending a renal clinic who met the definition of CKD (estimated glomerular filtration rate (eGFR) <60 ml/min/1.73 m(2) or urine protein/creatinine ratio of >0.22 g/g). Using age, race, proteinuria, eGFR, systolic blood pressure, and coronary artery disease as predictors, we calculated the competing end-points of ESRD or death using a competing Cox regression model.ResultsThe cumulative incidence for ESRD was 17.6% and death 18.5% during follow-up that lasted up to 7 years. ESRD was predicted by younger age (hazard ratio (HR) 0.91/year), black race (HR 2.75), higher systolic blood pressure (HR 1.02/mm Hg), proteinuria (HR 1.37/log urine protein/creatinine ratio) and low eGFR (0.014/log eGFR ml/min/1.73 m(2)). Death was predicted by older age (HR 1.07/year), lower eGFR (HR 0.43/log eGFR ml/min/1.73 m(2)), proteinuria (HR 1.26/log urine protein/creatinine ratio) and coronary artery disease (HR 2.52). The coefficients were statistically different for age (p < 0.001), log eGFR (p < 0.001) and systolic blood pressure (p = 0.04) for ESRD and death outcomes.ConclusionsThe risk for mortality is similar to the risk of ESRD in the CKD population of veterans seen by nephrologists. Risk factors for ESRD and death appear to differ in this population. Certain clinical and demographic factors may discriminate between the end-points of death or dialysis and may influence decisions about planning for ESRD.Copyright 2008 S. Karger AG, Basel

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