Also , baseline prostate specific antigen ( PSA ) , prostate volume , creatinine , International Prostatic Symptom Score ( IPSS ) , IPSS-Quality of Life ( IPSS-QoL ) , maximal urinary flow rates ( Qmax ) , average urinary flow rates ( AFR ) , post void residual urine volumes ( PVR ) , nocturia and Pittsburgh Sleep Quality Score ( PSQS ) were similar in both groups .