The two groups had comparable operation time ( p = 0.105 ) , catheterization time ( p = 0.173 ) , and length of hospital stay ( p = 0.395 ) , but were statistically different in the weight of resected prostate tissue ( p < 0.001 ) , bladder irrigation time ( p < 0.001 ) , hemoglobin levels ( p = 0.011 ) , and blood sodium levels ( p = 0.002 ) after surgery .