Abstract
To estimate the epidemiology of upper urinary stones in the elderly, a total of 1,957 patients (1,349 men and 608 women) with urolithiasis were studied. The ratio of men to women was approximately 3∶1 in middle-aged (between 30 and 59 years), 1∶1 in young (29 or younger) and 1∶1 in old patients (60 or older). Compared with the age distribution of the entire Japanese population, the incidence of urinary stones was very low in both male and female children, twice as high in middle-aged men, slightly higher in middle-aged women, and equal or slightly lower in the male and female elderly. Stones of calcium oxalate and uric acid occurred more frequently and those of calcium phosphate and struvite less frequently in men than in women. This tendency was especially obvious in the middle-aged. In the old generation, calcium oxalate stones occurred almost equally in men and women. Results of urinary stone analysis were similar among men of the three generations, although the incidence of uric acid stones increased with patient age. In women, however, the incidence of calcium oxalate was higher in the young and old generations, while that of calcium phosphate was higher in the middle-aged.
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Kohri, K., Ishikawa, Y., Katoh, Y. et al. Epidemiology of urolithiasis in the elderly. International Urology and Nephrology 23, 413–421 (1991). https://doi.org/10.1007/BF02583983
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DOI: https://doi.org/10.1007/BF02583983