[Predictability of Gleason score and reduction time (tau) of prostatic volume after castration for the prognosis of prostatic cancer].
OBJECTIVE
The efficacy of the reduction time (tau) after castration as a prognostic factor was examined by comparing to Gleason score.


METHODS
The change of prostatic volume after castration was observed from the castration to 3 months after in 24 cases of prostatic cancer. Prostatic volume was examined by transrectal ultrasonography of the prostate. Survival curves was calculated by Kaplan-Meier method. Differences among survival curves were analyzed using Cox-Mantel test.


RESULTS
tau had a close relationship to the prognosis of each case (Wilcoxon test: p < 0.05, Cox-Mantel test: p < 0.05). Gleason score had a weak relationship to prognosis (Wilcoxon test: N. S., Cox-Mantel test: p < 0.05).


CONCLUSIONS
tau was efficient as prognostic factor compared to Gleason score.
Hongo
F
F
Department of Urology, Kyoto Prefectural University of Medicine.
Nakanouchi
T
T
Nakamura
J
J
Azuma
Y
Y
Iida
A
A
Inoue
W
W
Okihara
K
K
Watanabe
M
M
Saitoh
M
M
Watanabe
H
H
Konishi
E
E
Ashihara
T
T
D000368:Aged; D000369:Aged, 80 and over; D002369:Castration; D006801:Humans; D008297:Male; D015999:Multivariate Analysis; D009929:Organ Size; D011237:Predictive Value of Tests; D011379:Prognosis; D011467:Prostate / Q000000981:diagnostic imaging / Q000473:pathology*; D011471:Prostatic Neoplasms / Q000145:classification / Q000473:pathology* / Q000601:surgery; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D013997:Time Factors; D014463:Ultrasonography