Effect of dietary intake on urinary oxalate excretion in calcium oxalate stone formers in their forties

Purpose: To examine the influence of dietary intake on urinary oxalate excr etion in calcium oxalate stone formers in their forties. Patients and Methods: Dietary intake was recorded by using the dietary-reco rd method in 58 idiopathic stone formers in their forties. The patients col lected their urine for 24 h at home and their urinary oxalate excretion was measured. The relationship between the dietary intake of various nutrients and urinary oxalate excretion was examined by mono- and multivariate analy sis. Results: The intake of animal fat was correlated with urinary oxalate excre tion by monovariate analysis, but that of total protein, animal protein, ca lcium and carbohydrate were not, By multivariate analysis, the intake of an imal fat was correlated with urinary oxalate excretion and the intake of ca lcium was inversely correlated with urinary oxalate excretion. Conclusion: The intake of animal fat was positively and the intake of calci um was negatively correlated with the urinary oxalate excretion in stone fo rmers in their forties, It was shown that animal fat plays an important rol e in urinary oxalate excretion, Copyright (C) 2000 S. Karger AG, Basel.