title: [Vasectomy not associated with prostate cancer: a meta-analysis].
abstract: OBJECTIVE
  To evaluate the association between vasectomy and prostate cancer.
  
  
  METHODS
  We searched comprehensively the databases, CBMDisc, CMCC, CMAC, CNKI (from 1978 to January 6, 2009), and PubMed (from 1965 to January 6, 2009) using the key words "vasectomy" and "prostate cancer", screened the retrieved literature according to the inclusion and exclusion criteria, performed a Meta-analysis with the software RevMan 4.2 after identification of the relevant data, and calculated the overall pooled OR (95% CI) as well as that of the association of prostate cancer with <20 and > or =20 yr vasectomy.
  
  
  RESULTS
  A total of 20 088 cases and 232 506 controls in 27 reports (7 cohort and 20 case-control studies) were included in this investigation. The overall pooled OR (95% CI) was 1.10 (0.97-1.24), and those of <20 and > or =20 yr vasectomy were 0.94 (0.83-1.06) and 1.05 (0.90-1.23), respectively.
  
  
  CONCLUSIONS
  No existing literature show any positive association between vasectomy and prostate cancer.
authors: Department of Urology, The Third Hospital of Peking University, Beijing 100191, China. lingfengtang@bjmu.edu.cn
authors: Ling-feng
authors: LF
authors: Tang
authors: Hui
authors: H
authors: Jiang
authors: Xue-jun
authors: XJ
authors: Shang
authors: Lian-ming
authors: LM
authors: Zhao
authors: Quan
authors: Q
authors: Bai
authors: Kai
authors: K
authors: Hong
authors: De-feng
authors: DF
authors: Liu
authors: Jian-ming
authors: JM
authors: Liu
authors: Ren-pei
authors: RP
authors: Yuan
authors: Qian
authors: Q
authors: Chen
authors: Lu-lin
authors: LL
authors: Ma
mesh_terms: D006801:Humans; D008297:Male; D011471:Prostatic Neoplasms / Q000453:epidemiology* / Q000209:etiology*; D012307:Risk Factors; D014659:Vasectomy / Q000009:adverse effects*