title: [Volumes of total prostate and transitional zone are positively correlated with age in benign prostatic hyperplasia patients].
abstract: OBJECTIVE
  To investigate the total prostate volume (TPV) and prostate transitional zone volume (TZV) in different age groups of benign prostatic hyperplasia patients, calculate the transitional zone index (TZI), and analyze correlation of age with the above parameters.
  
  
  METHODS
  We divided 1,563 BPH patients into 4 age groups (50-59, 60-69, 70-79 and 80-89 y), measured their TPV and TZV by rectal ultrasonography, calculated their TZI and evaluated all the data obtained by statistical analysis.
  
  
  RESULTS
  The TPV, TZV and TZI of the BPH patients were shown to be (32.27 +/- 15.76) ml, (9.55 +/- 98) ml and 0.28 +/- 0.13 in the 50-59 y group; (40.93 +/- 17.45) ml, (14.94 +/- 11.83) ml and 0.34 +/- 0. 16 in the 60-69 y group; (46.56 +/- 20.31) ml, (19.54 +/- 19.25) ml and 0.39 +/- 0.16 in the 70-79 y group; and (47.85 +/- 26.63) ml, (20.40 +/- 16.78) ml and 0.41 +/- 0.19 in the 80-89 y group. Both TPV and TZV were positively correlated with the patients' age, (r1 = 0.232, r2 = 0.256).
  
  
  CONCLUSIONS
  TPV and TZV increase with age in BPH patients, the latter even more obviously than the former.
authors.affiliation: Department of Urology, Changhai Hospital, Shanghai 200433, China.
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Liu
authors.forename: Chuan-Liang
authors.initials: CL
authors.lastname: Xu
authors.forename: Xu
authors.initials: X
authors.lastname: Gao
authors.forename: Luo-Man
authors.initials: LM
authors.lastname: Zhang
authors.forename: Xiao-Feng
authors.initials: XF
authors.lastname: Gao
authors.forename: Zhen-Sheng
authors.initials: ZS
authors.lastname: Zhang
authors.forename: Tie
authors.initials: T
authors.lastname: Zhou
authors.forename: Ying-Hao
authors.initials: YH
authors.lastname: Sun
mesh_terms: D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D006801:Humans; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011467:Prostate / Q000000981:diagnostic imaging*; D011470:Prostatic Hyperplasia / Q000000981:diagnostic imaging*; D014463:Ultrasonography