At 3 months after surgery , both the experimental and the control groups showed remarkable improvement in the International Prostatic Symptoms Scores ( 4.9 + / - 2.2 vs 5.3 + / - 2.3 ) , maximum urine flow rate ( [ 21.5 + / - 5.6 ] ml/s vs [ 19.1 + / -4.9 ] ml/s ) , and residual urine ( [ 16.8 + / - 10.3 ] ml vs [ 18.9 + / - 12.3 ] ml ) , but with no significant differences between the two ( P > 0.05 ) , and no significant differences were observed in postoperative complications ( P > 0.05 ) .