HealthDay News — Greater dietary intake of fiber, fruits, and vegetables is associated with a reduced risk of incident kidney stones in postmenopausal women, according to research published in The Journal of Urology.
“Recommendations of increased fluid intake, and low sodium, low animal protein and normal calcium intake diets have been the mainstays of the prevention of kidney stone recurrence,” said Mathew D. Sorensen, MD, of the University of Washington in Seattle, and colleagues.
“The identification of additional dietary factors associated with the risk of stone formation would be clinically beneficial.”
To evaluate the relationship between dietary fiber, fruit and vegetable intake, and the risk of incident kidney stone formation in women with and without a history of kidney stones, the investigators analyzed prospective data from 83,922 postmenopausal women, adjusting for nephrolithiasis risk factors.
Of the participants, 3.5% of women experienced a kidney stone during a median follow-up of eight years. In adjusted models of women without a stone history, higher total dietary fiber was associated with a 6% to 26% decreased risk (P<0.001), greater fruit intake was associated with a 12% to 25% decreased risk (P<0.001), and greater vegetable intake was associated with a 9% to 22% decreased risk (P<0.002).
There were no significant protective effects noted for fiber, fruit, or vegetable intake on the risk of kidney stone recurrence in women with a history of stones.
“The protective effects were independent of other known risk factors for kidney stones,” wrote the researchers.