title: The influence of serial prostate-specific antigen (PSA) screening on the PSA velocity at diagnosis.
abstract: BACKGROUND
  A prostate-specific antigen (PSA) velocity (PSAV) >2 ng/mL during the year before diagnosis has been associated with an increased risk of prostate cancer-specific mortality (PCSM) after radical prostatectomy (RP) or radiation therapy. The objective of the current study was to examine whether the proportion of men with a PSAV >2 ng/mL per year has changed significantly during the PSA era.
  
  
  METHODS
  The authors evaluated 1095 men from a prospective prostate cancer screening study who underwent RP between 1989 and 2002. For the purposes of this analysis, clinicopathologic features were compared between men who were treated during the following 3 periods: before 1995, from 1995 to 1998, and after 1998. Logistic regression analysis was used to evaluate for an association between the year of diagnosis and the proportion of men with a PSAV >2 ng/mL per year.
  
  
  RESULTS
  Two hundred sixty-two of 1095 men (24%) had a PSAV >2 ng/mL per year. There was a statistically significant reduction in the proportion of men presenting with a PSAV >2 ng/mL per year over the study period. Specifically, 35% of men presented with a PSAV >2 ng/mL per year in the early period compared with only 22% and 12% in the middle and late periods, respectively (P < .001). Over the studied periods, there also was a significantly greater proportion of men with >2 PSA values obtained before diagnosis (P < .001).
  
  
  CONCLUSIONS
  Men who were screened serially with PSA were less likely to present with a PSAV >2 ng/mL per year. This association lends support to the hypothesis that serial PSA-based screening may lead to a decrease in PCSM.
authors.affiliation: Department of Radiation Oncology, Harvard Radiation Oncology Program, Boston, Massachusetts, USA. nmartin@lroc.harvard.edu
authors.forename: Neil E
authors.initials: NE
authors.lastname: Martin
authors.forename: Ming-Hui
authors.initials: MH
authors.lastname: Chen
authors.forename: William J
authors.initials: WJ
authors.lastname: Catalona
authors.forename: Stacy
authors.initials: S
authors.lastname: Loeb
authors.forename: Kimberly A
authors.initials: KA
authors.lastname: Roehl
authors.forename: Anthony V
authors.initials: AV
authors.lastname: D'Amico
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis; D006801:Humans; D008297:Male; D008875:Middle Aged; D017430:Prostate-Specific Antigen / Q000032:analysis*; D011471:Prostatic Neoplasms / Q000175:diagnosis* / Q000401:mortality; D015996:Survival Rate; D013997:Time Factors
chemical_list: D014408:Biomarkers, Tumor; D017430:Prostate-Specific Antigen