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  • Title: [Progression of renal insufficiency in the pre-end-stage renal disease setting].
    Author: Caravaca F, Arrobas M, Luna E, Pizarro JL, García C, Espárrago JF, Sánchez-Casado E.
    Journal: Nefrologia; 2003; 23(6):510-9. PubMed ID: 15002786.
    Abstract:
    The rate of decline of renal function (RDRF) in the pre-end stage renal disease setting (pre-ESRD) is highly variable. Several factors have been involved as potential modifiers of renal failure progression. This retrospective study attempts to establish which were the main determinants of the RDRF in pre-ESRD patients followed in the predialysis consult. The study group consisted of 230 patients with pre-ESRD not yet on dialysis who were referred to the predialysis consult from January 1998 to July 2002. The mean follow-up time per patient was 356 days. RDRF was assessed as delta of the average of creatinine and urea clearances (CrCl-UCl). Data obtained at time of referral to the predialysis consult were analyzed as potential predictors of the subsequent RDRF. These independent variables included: demographics, comorbid conditions, main hematological and biochemical data, antihypertensive and statin treatment, mean blood pressure, and CrCl-UCl at time of referral. The predictors of delta CrCl-UCl were determined by multiple linear regression analysis. The determinants of the survival without dialysis were established by the Cox regression hazard model, adjusted to renal function at time of referral. Mean CrCl-UCl at time of referral was 10.98 +/- 2.58 ml/min/1.73 m2, and mean delta CrCl-UCl was -0.37 +/- 0.46 ml/min/1.73 m2/month. Patients with diabetic nephropathy and chronic glomerulonephritis had the fastest RDRF, while patients with ischemic nephropathy and chronic interstitial nephritis had the slowest RDRF. Seventy-five patients (46%) required EPO therapy. The best determinants of delta CrCl-UCl were: the 24-hour proteinuria (p < 0.0001), and the hematocrit at time of referral (p = 0.0024). The best determinants of the survival rate without dialysis during the study period were: the proteinuria (in g/24 hours) (R 1, 16; p < 0.0001), the hematocrit at time of referral (OR: 0.88; p < 0.0001), the treatment with EPO (OR: 0.59; p = 0.02), and the diagnosis of diabetes mellitus (OR: 1.59; p = 0.01). In conclusion, apart from the rate of proteinuria, which could represent the best marker of the RDRF in chronic renal diseases, the development of anemia was associated with faster decline in renal function.
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