KLK3 and benign prostatic hyperplasia: a patient-control comparison p=<0.001<br>b patient-BPH comparison p=<0.001<br>c control-BPH comparison p=<0.001<br>T-PSA: total prostate specific antigen, fPSA: free prostate specificantigen, f/T PSA: free/total PSA ratio, fPSA %: free PSA percentage.<br>The results were reported as mg of PSA per liter (mg/L) of blood.