Studies on the occurrence of urinary stone disease in Leeds between 1960 and 1980 show that there was an increase in the number of stones formed during the period 1960–1970, a fall between 1972 and 1976 and a subsequent rise between 1977 and 1980. The fluctuations in stone incidence were accounted for almost entirely be changes in the number of ‘pure’ calcium oxalate stones and, to a lesser extent, the number of uric acid stones produced. The incidence patterns of these types of stone closely reflected changes in the consumption of animal protein in the population as a whole during the same period. There were no parallel changes either in the number of stones consisting of a mixture of calcium oxalate and calcium phosphate or in the number of infection stones.

Keywords:
Urinary stones, Calcium oxalate, Calcium phosphate, Uric acid, Dietary animal protein
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© 1982 S. Karger AG, Basel
1982
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