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2014, Number 3

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Rev cubana med 2014; 53 (3)

Sodium intake in lithiasic patients and its relationship to demographic and nutritional variables

Bacallao MRA, Mañalich CR, Gutiérrez GF, Llerena FB

Language: Spanish
References: 27
Page: 300-309
PDF size: 177.46 Kb.


ABSTRACT

Introduction: measurement of urinary sodium excretion is important in patients with urolithiasis, for a high level of excretion leads to hypercalciuria, the most common urinary metabolic disorder.
Objective: to determine sodium intake (equal to excretion) and identify its possible relationship to demographic and nutritional variables in patients with urinary lithiasis.
Methods: an analytical cross-sectional study was conducted in patientes with urinary lithiasis undergoing metabolic renal study at the Institute of Nephrology from January 2011 to December 2012. Patients with factors modifying sodium excretion were excluded. Creatinine determinations were made with Jaffé's kinetic method using a Jenway™ spectrophotometer. Urinary sodium was measured with a Roche™ electrolytic analyzer. Data was processed with the statistical software SPSS version 15.0. Variables for each category were estimated as mean and standard deviation of sodium excretion (mEq/d). Comparisons of averages were made with the t test or ANOVA.
Results: of the 1 985 patients studied, 1 363 were male (68.7 %) and 622 were female (31.3 %). Global mean sodium urinary excretion was 235.29 mEq/d, greater in men (252.69 mEq/d) than in women (197.14 mEq/d) (p= 0.00). Differences were also found when sodium excretion was compared by nutritional assessment (p= 0.00) and creatinine excretion (p= 0.0).
Conclusions: urinary sodium excretion is high in patients with urolithiasis. Values are higher in men, and in overweight and obese individuals.


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