After stratifying patients according to prostate volume , there was no significant difference between the two treatment groups with regard to urethral stricture rates in patients with a prostate volume @mL ( @ % in M-TURP vs @ % in TURis ) , but in the TURis group there was a significantly higher urethral stricture rate compared with the M-TURP group in patients with a prostate volume > @mL ( @ % in TURis vs @ % in M-TURP ; P = @ ) .