Racial variation in gender frequency of calcium urolithiasis.
Calcium oxalate stones are known to occur most frequently in the fifth and sixth decades of life and in a male-to-female ratio of approximately 2:1. However, previous data are from predominantly white populations or from multiracial populations that have included patients with infection stones. We reviewed a population of 444 consecutive patients (189 white, 123 black and 132 Hispanic) from 1 urban hospital treated by shock wave lithotripsy for symptomatic renal and ureteral calculi, and added a population of 260 patients treated at a university hospital in Japan. Patients with infection stones and those with uric acid or cystine stones were excluded. We found men to be more commonly afflicted in the white (62%) and Asian (64%) populations but noted a reversal of gender frequency in the black and Hispanic populations, of which women comprised 68% and 60% of the stone population, respectively. We conclude that calcium urolithiasis is more common in women than previously reported, and discuss the possible etiologies.
Department of Urology, University of Illinois College of Medicine at Chicago.
E K
EK
Michaels
Y
Y
Nakagawa
N
N
Miura
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S
Pursell
H
H
Ito
D000328:Adult; D000367:Age Factors; D000368:Aged; D002129:Calcium Oxalate / Q000032:analysis*; D002641:Chicago / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008096:Lithotripsy; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D044469:Racial Groups; D012189:Retrospective Studies; D012737:Sex Factors; D014545:Urinary Calculi / Q000737:chemistry / Q000208:ethnology* / Q000628:therapy
D002129:Calcium Oxalate