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Official publication of the Indian Society of Nephrology
 
ORIGINAL ARTICLE
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Mortality and low serum bicarbonate level in patients on hemodiafiltration versus peritoneal dialysis


1 1st Department of Medicine-Propaedaetic, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
2 Department of Nuclear Medicine, General Hospital “LAΪKO”, Athens, Greece

Correspondence Address:
VD Raikou,
17, Agiou Thoma, Athens
Greece
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Source of Support: None, Conflict of Interest: None

Mortality is substantially elevated in patients on chronic kidney disease in comparison to general population. In this study, we observed the mortality rate in relation to risk factors including low serum bicarbonate level, coronary artery disease (CAD), and dialysis modality in patients on dialysis during a median follow-up time of 60 months. We studied 96 dialysis patients, 62 males and 34 females, on mean age 62.1 ± 14.27 years old. The treatment modalities which were applied were predilution hemodiafiltration (HDF, n = 76), and peritoneal dialysis (PD, n = 20). We performed Kaplan–Meier curves and a Cox-regression analysis to investigate significant risk factors for mortality including hypertension, diabetes mellitus, smoking, bone disease defined by intact-parathormone, serum albumin, serum bicarbonate levels < or >22 mEq/L, dialysis modality, and the existence of CAD. Cox-regression analysis revealed a significant impact of serum bicarbonate levels <22 mEq/L on mortality in combination to dialysis modality and CAD. The prevalence of CAD on mortality was found significant (log-rank = 5.507, P = 0.02). Furthermore, the impact of dialysis modality on mortality was shown significant (log rank = 22.4, P = 0.001), noting that during the first 28–30 months from the treatment initiation, the survival was better for PD; but then, the mortality was significantly increased comparatively to HDF. Uncorrected metabolic acidosis and CAD were shown as independent significant predictors for mortality in patients on renal replacement therapy. PD may provide worse survival after 2–2.5 years of treatment initiation than HDF.


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    -  Raikou V D
    -  Kyriaki D
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Indian Journal of Nephrology
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Online since 20th Sept '07