This study compares the evolution of urinary dysfunction and associated distress (bother) during the first two years after radical prostatectomy (RP) or external beam radiation therapy (EBRT) between Japanese and U.S. men with localized prostate cancer. 

A total of 477 Japanese men and 385 U.S. men with localized prostate cancer who underwent RP or EBRT participated in paired longitudinal outcomes studies. Conclusions were that Japanese and U.S. men differed in their patterns of urinary recovery up to 24 months after curative therapy for localized prostate cancer.