Abstract
An epidemiological study about stone disease was carried out by mailing a postal questionnaire to 6000 persons; it concerned a sample of the population of the USL n. 5 (Fidenza - PR). This population sample was divided into two groups: those who live on the hills and those who live on the plain. No differences of any kind were found between the two groups. It came out that the incidence of stone disease in the general population is 8%. There was a relationship between stone disease and hypertension and other renal diseases. Stone-formers showed no alimentary difference from non-stone formers. Stone-formers drank more still mineral water than non-stone formers, but only 37% of them drank at least 2 litres a day.
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