Spontaneous dietary protein intake during progression of chronic renal failure.

Journal of the American Society of Nephrology : JASN
T A IkizlerR M Hakim

Abstract

Malnutrition at the initiation of dialysis is a strong predictor of subsequent increased mortality on dialysis. Few studies have documented the relationship between the progression of renal failure and spontaneous dietary protein intake (DPI) and other indices of malnutrition. In this prospective study, renal function was sequentially measured by creatinine clearance (CrCl) and DPI by 24-h urine collection; simultaneously, multiple sequential biochemical nutritional indices, including serum albumin, transferrin, prealbumin, and insulin-like growth factor-I (IGF-I) concentrations, were measured. The study involved 90 patients (46 men and 44 women) with chronic renal failure (CRF) of various causes monitored in an outpatient clinic. Dietary interventions were minimal. The mean duration of follow-up was 16.5 +/- 11.8 months. The results show that the mean (+/- SD) DPI was 1.01 +/- 0.21 g/kg per day for patients with CrCl over 50 mL/min and decreased to 0.85 +/- 0.23 g/kg per day for patients with CrCl between 25 and 50 mL/min. The DPI further decreased to a level of 0.70 +/- 0.17 g/kg per day for patients with CrCl between 10 and 25 mL/min and was 0.54 +/- 0.16 g/kg per day for patients with CrCl below 10 mL/min. This trend was st...Continue Reading

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