Study Design
The patients’ medical records were retrospectively reviewed. Patients age, prostate volume (PV) total PSA (tPSA) and fPSA level (fPSA), rate of percentage of free to total prostate specific antigen (f/tPSA), PSA-Density (PSA-D) (mL) level were evaluated. Also PSA velocity (PSAv) was calculated according to difference of PSA forms (tPSAv, fPSAv, f/tPSAv and PSA-Dv) between first and second biopsy.