Dietary and urinary risk factors for stones in idiopathic calcium stone formers compared with healthy subjects

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
F LeonettiY Berland

Abstract

The high social-economic cost of nephrolithiasis wholly justifies the attempts to understand its mechanism and avoid recurrences. The influence of dietary habits and urinary risk factors has been evaluated, but the results were discrepant, probably because of differences in the methodologies used to compare patients and controls. The aim was to assess dietary and urinary risk factors for urinary stones by comparison between 108 calcium stone formers (SF) and 210 healthy subjects (HS). All subjects were recruited during the same 1 year period. Personal characteristics, dietary habits (evaluated through a food frequency questionnaire) and urinary biochemical parameters were collected. The high predominance of men in the SF group led us to focus on the 79 SF and the 96 HS men. A familial history of stones was reported more frequently in SF than in HS, 42.9% vs 17.6%, P<0.005. Body weight was higher in SF, 76.8+/-12.2 kg vs 72.8+/-9.6 kg, P=0.02; and calcium intake was lower in SF, 794.8+/-294.1 mg vs 943.6+/-345.4 mg, P<0.01. For urinary parameters, calcium and oxalate output were significantly higher in SF. Urinary urea, as a reflection of daily protein intake, and uric acid were also higher in SF. Urinary citrate excretion relat...Continue Reading

Citations

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