title: Prostate-specific antigen velocity (PSAV) and PSAV per initial volume (PSAVD) for early detection of prostate cancer in Chinese men.
abstract: OBJECTIVE
  To investigate the utility of prostate-specific antigen velocity (PSAV) and PSAV per initial volume (PSAVD) for early detection of prostate cancer (PCa) in Chinese men.
  
  
  METHODS
  Between January 2009 and June 2012, a total of 193 men (aged 49-84 years, median 67 years) with at least 2 transrectal ultrasonography (TRUS) procedures and concurrent serum PSA measurements underwent prostate biopsy because of suspicion of PCa. The total group were classified into PCa and non-PCa groups, and the variables of the two groups were compared. Univariate and multivariate analyses were used to investigate which variables were predictove. The diagnostic values of PSAV, PSAVD and prostate-specific antigen density (PSAD) were compared using receiver operating characteristic (ROC) analysis.
  
  
  RESULTS
  Prostate cancer was diagnosed in 44 (22.8%) of the 193 men. There were significant differences between the groups in last and initial prostate volumes determined by TRUS, initial age, last serum PSA levels, PSAV, PSAD and PSAVD. After adjusting for confounding factors, the odds ratios of PCa across the quartile of PSAVD were 1, 4.06, 10.6, and 18.9 (P for trend <0.001).The area under the ROC curves (AUCs) of PSAD (0.779) and PSAVD (0.776) were similar and both significantly greater than that of PSA (AUC 0.667). PSAVD was a significantly better indicator of PCa than PSAV (AUC 0.736). There was no statistical significant difference between the AUC of PSAV and that of last serum PSA level. The sensitivity and specificity of PSAVD at a cutoff of 0.023ng in participants with last serum PSA levels of 4.0 ng/mL-10.0 ng was 73.7% and 70.7%, respectively.
  
  
  CONCLUSIONS
  The results of this study demonstrated PSAVD may be a useful tool in PCa detection, especially in those undergoing previous TRUS examination.
authors: Department of Urology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
authors: Xiang-Yi
authors: XY
authors: Zheng
authors: Peng
authors: P
authors: Zhang
authors: Li-Ping
authors: LP
authors: Xie
authors: Qi-Han
authors: QH
authors: You
authors: Bo-Sen
authors: BS
authors: Cai
authors: Jie
authors: J
authors: Qin
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019540:Area Under Curve; D044466:Asian People; D014408:Biomarkers, Tumor / Q000097:blood*; D042241:Early Diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D017430:Prostate-Specific Antigen / Q000097:blood*; D011471:Prostatic Neoplasms / Q000097:blood / Q000175:diagnosis*; D012372:ROC Curve
chemical_list: D014408:Biomarkers, Tumor; D017430:Prostate-Specific Antigen