Prostate-specific Antigen Velocity (PSAV) and PSAV per Initial Volume (PSAVD) for Early Detection of Prostate Cancer in Chinese Men

Aim: 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 andJune 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 suspicionof PCa. The total group were classified into PCa and non-PCa groups, and the variables of the two groups werecompared. Univariate and multivariate analyses were used to investigate which variables were predictove. Thediagnostic values of PSAV, PSAVD and prostate-specific antigen density (PSAD) were compared using receiveroperating 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 oddsratios of PCa across the quartile of PSAVD were 1, 4.06, 10.6, and 18.9 (P for trend <0.001).The area under theROC curves (AUCs) of PSAD (0.779) and PSAVD (0.776) were similar and both significantly greater than thatof PSA (AUC 0.667). PSAVD was a significantly better indicator of PCa than PSAV (AUC 0.736). There was nostatistical significant difference between the AUC of PSAV and that of last serum PSA level. The sensitivity andspecificity of PSAVD at a cutoff of 0.023ng in participants with last serum PSA levels of 4.0ng/mL-10.0ng was73.7% and 70.7%, respectively.
Conclusions: The results of this study demonstrated PSAVD may be a usefultool in PCa detection, especially in those undergoing previous TRUS examination.