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J Urol. 1996 Apr;155(4):1324-7.

Japanese men have smaller prostate volumes but comparable urinary flow rates relative to American men: results of community based studies in 2 countries.

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  • 1Department of Urology and Public Health, Sapporo Medical University School of Medicine, Sapporo, Japan.

Abstract

PURPOSE:

We compared prostate volume and peak urinary flow rate in Japanese and American men 40 to 79 years old.

MATERIALS AND METHODS:

Prostate volume and peak urinary flow rate were measured in eligible Japanese men and results were compared to those of a randomly selected American cohort.

RESULTS:

Mean prostate volume plus or minus standard deviation averaged 20.3 +/- 10.6 ml. in Japanese and 29.6 +/- 13.4 ml. in American men, while predicted cross-sectional increases with age decade were 1.5 and 5.5 ml., respectively. Peak urinary flow rate was higher but the decrease with increasing age was greater in Japanese men.

CONCLUSIONS:

Prostate volume is larger and the increase with age is more pronounced in American than in Japanese men. However, Japanese men may have a higher peak urinary flow rate and greater cross-sectional decrease with age.

PMID:
8632564
[PubMed - indexed for MEDLINE]
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